MOTORCYCLES APPROVED FOR AMA CLASS C COMPETITION
1949 to 1989


NOTE: 1949 was the first year that the AMA published a list of approved models for competition.
Several models listed in the 1949 approval were approved prior to 1949.


Page content updated 11/26/2017




NOTE: Most searches do not work in combination with each other.

Year
Approved
Brand / Model Approx.
Displacement
Configuration Source AMA Vintage
National Class
1955 ADLER MB 250cc 248cc 2-stroke AC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1957 ADLER Moto Cross 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1969 1952-1968 era 250cc
1957 ADLER Sprinter 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1970 1952-1968 era 250cc
1949 AJS 18 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1971 1933-1951 era 750cc
1949 AJS 16M 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1972 1933-1951 era 750cc
1949 AJS 16MCS 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1973 1933-1951 era 750cc
1949 AJS 16MS 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1974 1933-1951 era 750cc
1949 AJS 18C 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1975 1933-1951 era 750cc
1949 AJS 18CS 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1976 1933-1951 era 750cc
1949 AJS 18S 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1977 1933-1951 era 750cc
1952 AJS 20 500cc 498cc 4-stroke OHV twin [66mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 AJS 20B 560cc 544cc 4-stroke OHV twin [69mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1956 AJS 30 600cc 592cc 4-stroke OHV twin [72mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 AJS 18CS 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 AJS 30CS 600cc 592cc 4-stroke OHV twin [72mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 AJS 14 Road Trim 250cc 246cc 4-stroke OHV single [70mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 AJS 14CS Scrambler 250cc 246cc 4-stroke OHV single [70mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 AJS 18 CST Typhoon 560cc 569cc 4-stroke OHV single [87.3mm bore x 95mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1958 AJS 18CS 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1958 AJS Clubman (Model 31) 650cc 646cc 4-stroke OHV twin [72mm bore x 79.35mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 AJS Hurricane 650cc 646cc 4-stroke OHV twin [72mm bore x 79.35mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 AJS 14 Road Model 250cc 249cc 4-stroke OHV single [69.85mm bore x 64.85mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 AJS 18 TCS Typhoon 600cc 588cc 4-stroke OHV single [87.3mm bore x 98.2mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1959 AJS 31CS Scrambler 650cc 646cc 4-stroke OHV twin [72mm bore x 79.3mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 AJS CS Scrambler 250cc 250cc 4-stroke OHV single [70mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1971 AJS Y40 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1953 ALL-STATE 9415 125cc 121cc 2-stroke single [52.1mm bore x 56.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1953 ALL-STATE 9417 ' 200' 250cc 198cc 2-stroke AC Split Single [45mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1954 ALL-STATE 9418 ' 250' 250cc 248cc 2-stroke AC Split Single [45mm bore x 78mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1956 ALL-STATE 9416 ' 175' 175cc 170cc 2-stroke AC Split Single [41.9mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1956 ALL-STATE 9417 ' 200' 250cc 198cc 2-stroke AC Split Single [45mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1956 ALL-STATE 9418 ' 250' 250cc 248cc 2-stroke AC Split Single [45mm bore x 78mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 ALL-STATE 94200 250cc 248cc 2-stroke Split Single [45mm bore x 78mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1978 AMERICAN 750-1 750cc 748cc 4-stroke twin [80mm bore x 74.5mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1950 ARIEL 4G Square 4 1000cc 996cc 4-stroke OHV 4-cyl [65mm bore x 75mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1950 ARIEL KG 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL KH Red Hunter 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL NG 360cc 346cc 4-stroke OHV single [72mm bore x 85mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL NH Red Hunter 360cc 346cc 4-stroke OHV single [72mm bore x 85mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL VB 600cc 598cc 4-stroke SV single [86.4mm bore x 102mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL VG 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ARIEL VH Red Hunter 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1953 ARIEL KH 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 ARIEL KHA 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 ARIEL VCH Competition 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 ARIEL VH 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 ARIEL VHA 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 ARIEL FH 650cc 646cc 4-stroke OHV twin [70mm bore x 84mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1954 ARIEL HS Red Hunter Scrambler 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 ARIEL HT Red Hunter Scrambler 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 ARIEL LH Colt 250cc 198cc 4-stroke OHV single [60mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 ARIEL HT Speedway 500cc 499cc 4-stroke OHV single [81.8mm bore x 95mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1958 ARIEL FH 650cc 646cc 4-stroke OHV twin [70mm bore x 84mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 ARIEL Leader 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 ARIEL Arrow 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1985 ATK ATK 560 560cc 562cc 4-stroke single [94mm bore x 81mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1965 BENELLI Barracuda 250cc 245cc 4-stroke OHV single [74mm bore x 57mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 BENELLI Imperial 125cc 124cc 4-stroke OHV single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 BENELLI Sprite 250cc 198cc 4-stroke OHV single [66.5mm bore x 57mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1970 BENELLI 650 Tornado 660cc 658cc 4-stroke twin [85mm bore x 58mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 BENELLI 175cc Enduro 175cc 170cc 2-stroke single [60mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 BENELLI Banshee 100cc 88cc 2-stroke single [51mm bore x 43mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 BENELLI Panther 125cc 121cc 2-stroke single [56mm bore x 49mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 BENELLI Phantom 250cc 232cc 2-stroke AC twin [56mm bore x 47mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1974 BENELLI SEI 750cc 750cc 4-stroke AC OHC 6-cyl [56mm bore x 50.6mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1975 BENELLI Quattro 500cc 500cc 4-stroke AC OHC 4-cyl [56mm bore x 50.6mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1964 BIANCHI Guardian 80cc 71cc 2-stroke single [46mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1951 BMW R51-3 500cc 494cc 4-stroke OHV twin [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1957 BMW R50 500cc 494cc 4-stroke OHV twin [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 BMW R60/5 500cc 494cc 4-stroke OHV twin [68mm bore x 68mm stroke] Bulletin #61, 10/2/1973 1952-1968 era 750cc
1960 BMW R26 250cc 247cc 4-stroke OHV single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 BMW R27 250cc 247cc 4-stroke OHV single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 BMW R50S 500cc 494cc 4-stroke OHV twin [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1961 BMW R69S 600cc 594cc 4-stroke OHV twin [72mm bore x 73mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1970 BMW R75/5 750cc 746cc 4-stroke OHV twin [82mm bore x 70.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1974 BMW R75/6 750cc 746cc 4-stroke AC twin [82mm bore x 70.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 BMW R90/6 1000cc 898cc 4-stroke AC twin [90mm bore x 70.6mm stroke] Bulletin #61, 9/18/1974 Hot Rod Multis
1974 BMW R90S 1000cc 898cc 4-stroke AC twin [90mm bore x 70.6mm stroke] Bulletin #61, 9/18/1974 Hot Rod Multis
1977 BMW R100S 1000cc 980cc 4-stroke twin [94mm bore x 70.6mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1966 BRIDGESTONE Dual Twin "R" 175cc 176cc 2-stroke twin [49.76mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 BRIDGESTONE Mountain C210 100cc 88cc 2-stroke single [50mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 BRIDGESTONE Sport C301 80cc 58cc 2-stroke single [41.9mm bore x 41.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 BRIDGESTONE Sport C302 100cc 88cc 2-stroke single [50mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 BRIDGESTONE Sports C300 50cc 50cc 2-stroke single [38.9mm bore x 41.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 BRIDGESTONE Trail Scr C209 100cc 88cc 2-stroke single [50mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 BRIDGESTONE C304 100cc 99cc 2-stroke single [53mm bore x 45mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 BRIDGESTONE C306 100cc 88cc 2-stroke single [50mm bore x 45mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 BRIDGESTONE C314 100cc 99cc 2-stroke single [53mm bore x 45mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 BRIDGESTONE C315 175cc 176cc 2-stroke twin [50mm bore x 45mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 BRIDGESTONE C320 360cc 344cc 2-stroke twin [61mm bore x 59mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1969 BRIDGESTONE Sport 100 100cc 99cc 2-stroke single [53mm bore x 45mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 BRIDGESTONE Sport 200 250cc 198cc 2-stroke twin [53mm bore x 45mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1969 BRIDGESTONE Trail 100 100cc 99cc 2-stroke single [53mm bore x 45mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 BRIDGESTONE Trail 200 250cc 198cc 2-stroke twin [53mm bore x 45mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1971 BRONCCO APACHE TX9 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1954 BSA A10 Road Rocket 650cc 646cc 4-stroke OHV twin [70mm bore x 84mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1954 BSA A7 Shooting Star 500cc 496cc 4-stroke OHV twin [66mm bore x 72.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 BSA B32GS 360cc 348cc 4-stroke OHV single [71mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 BSA B33 Gold Star 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 BSA B34 Gold Star 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 BSA B34GS Gold Star 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 BSA C10L 250cc 249cc 4-stroke SV single [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1954 BSA C11 250cc 249cc 4-stroke OHV single [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 BSA A10R 650cc 646cc 4-stroke OHV twin [70mm bore x 84mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 BSA A10RR Rocket Scrambler 650cc 646cc 4-stroke OHV twin [70mm bore x 84mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 BSA B32 Alloy Clipper 360cc 348cc 4-stroke OHV single [71mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 BSA B34 Alloy Clipper 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 BSA B34 Catalina Scrambler 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 BSA B34 Dirt Track 500cc 499cc 4-stroke OHV single [85mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 BSA D3 175cc 148cc 2-stroke single [57mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 BSA D5 Bantam Super 175cc 172cc 2-stroke single [61.5mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 BSA D5 Super Bantam 175cc 172cc 2-stroke single [61.5mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 BSA Bantam D1 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 BSA C15 Scrambler 250cc 247cc 4-stroke OHV single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 BSA C15 Standard 250cc 247cc 4-stroke OHV single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 BSA D7 175cc 172cc 2-stroke single [61.5mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 BSA C15 Scrambler 250cc 247cc 4-stroke OHV single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 BSA B40 360cc 343cc 4-stroke OHV single [79mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 BSA A50 500cc 498cc 4-stroke OHV twin [65.5mm bore x 74mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 BSA A65 Royal Star 650cc 654cc 4-stroke OHV twin [75mm bore x 74mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1964 BSA A502C Cyclone 500cc 498cc 4-stroke OHV twin [65.5mm bore x 74mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 BSA A65-2L Lightening 650cc 654cc 4-stroke OHV twin [75mm bore x 74mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1964 BSA A65-2SPH Hornet 650cc 654cc 4-stroke OHV twin [75mm bore x 74mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1964 BSA A65-IT Thunderbolt 650cc 654cc 4-stroke OHV twin [75mm bore x 74mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1964 BSA Cyclone Competition 500cc 498cc 4-stroke OHV twin [65.5mm bore x 74mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1966 BSA Victor Scrambler 500cc 441cc 4-stroke OHV single [79mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1966 BSA Victor Special 500cc 441cc 4-stroke OHV single [79mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1967 BSA B25 250cc 247cc 4-stroke OHV single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 BSA B25 360cc 343cc 4-stroke OHV single [79mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1952-1968 era 750cc
1967 BSA B25 360cc 352cc 4-stroke OHV single [80mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1952-1968 era 750cc
1967 BSA B25 360cc 356cc 4-stroke OHV single [80.5mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1952-1968 era 750cc
1969 BSA Rocket 3 750cc 741cc 4-stroke OHV triple [67mm bore x 70mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1971 BSA A70L 750cc 752cc 4-stroke OHV twin [75mm bore x 85mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 BSA A75V 750cc 741cc 4-stroke OHV triple [67mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 BSA B50SS 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1971 BSA B50T 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1972 BSA RICKMAN METISSE 250MX 250cc 248cc 4-stroke OHV single [72.5mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1987 BUELL RR1000 B.T. 1000cc 998cc 4-stroke twin [81mm bore x 96.8mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1962 BULTACO Sherpa 125cc 125cc 2-stroke single [51.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 BULTACO Sherpa 175cc 175cc 2-stroke single [60.9mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 BULTACO Sherpa 250cc 196cc 2-stroke single [64.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 BULTACO Metisse 250cc 244cc 2-stroke AC single [72mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 BULTACO TSS Road Racer 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 BULTACO Lobito 100cc 99cc 2-stroke single [49.5mm bore x 51.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 BULTACO Metralia 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 BULTACO Pursang 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 BULTACO "E Bandido 360cc 346cc 2-stroke single [83mm bore x 64mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1968 BULTACO "F" Bandido 360cc 355cc 2-stroke single [84mm bore x 64mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1970 BULTACO 30 100cc 99cc 2-stroke single [49.5mm bore x 51.5mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 BULTACO M90 Astro 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 BULTACO M87 Pursang 360cc 326cc 2-stroke single [83.2mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1974 BULTACO 117 Pursang 125cc 125cc 2-stroke AC single [51.5mm bore x 60mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 BULTACO 120 Pursang 250cc 244cc 2-stroke AC single [72mm bore x 60mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 BULTACO 121 Pursang 360 360cc 360cc 2-stroke single [84.6mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1974 BULTACO 121 Pursang MK7 360 360cc 352cc 2-stroke AC single [83.7mm bore x 64mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1974 BULTACO 123-360 Astro 360cc 352cc 2-stroke AC single [83.7mm bore x 64mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1975 BULTACO 135 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 BULTACO 136 360cc 363cc 2-stroke single [85mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1975 BULTACO 146 360cc 355cc 2-stroke single [84mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1975 BULTACO 146 360cc 360cc 2-stroke single [84.6mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1977 BULTACO M123 Astro 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1977 BULTACO M146 Astro 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1977 BULTACO M164 Astro 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1977 BULTACO M195 Astro 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1985 CAGIVA WMX 125/85 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 CAGIVA WMX 500/85 500cc 487cc 2-stroke WC single [87mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 CAGIVA WMX 125/86 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 CAGIVA WMX 125Cross 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1974 CAN-AM 4843 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 CAN-AM 4851 175cc 174cc 2-stroke single [62mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 CAN-AM MX 250 (4863) 250cc 247cc 2-stroke single [74mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM 125 MX2 (5844) 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM 125 T'NT (5841) 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM 175 MX2 (5854) 175cc 174cc 2-stroke single [62mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM 175 T'NT (5851) 175cc 174cc 2-stroke single [62mm bore x 57.5mm stroke] Bulletin #61, 6/20/1978 1969-1976 era 250cc
1975 CAN-AM 250 T'NT (5861) 250cc 247cc 2-stroke single [74mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM 250MX II (5864) 250cc 247cc 2-stroke single [74mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 CAN-AM GP250 (5860) 250cc 247cc 2-stroke single [74mm bore x 57.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1982 CAN-AM 8507 500cc 494cc 4-stroke single [89mm bore x 79.4mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 500cc
1964 CAPRIOLO Antelope 80cc 75cc 4-stroke OHC single [47mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 CAPRIOLO Cheetah 125cc 124cc 4-stroke OHC single [55mm bore x 52mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 CAPRIOLO Gazelle 100cc 98cc 4-stroke OHC single [54mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1976 CARABELA CE 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1976 CARABELA IVE 500cc 453cc 2-stroke single [86mm bore x 78mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1973 COOPER 250 5-V 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1962 COTTON Cougar 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 COTTON Cobra 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 COTTON Cougar 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 COTTON Telstar Racer 250cc 247cc 2-stroke AC single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 DANUVIA - 125cc 124cc 2-stroke AC single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 DANUVIA Sport 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1955 DMW MK5 MotoX 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1955 DMW MK6 MotoX 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1956 DOT SCH Scrambler 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 DOT THX4 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI 125 Super Sport 125cc 124cc 4-stroke OHC single [55.2mm bore x 52mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI 175 Americano 175cc 175cc 4-stroke OHC single [62mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI 175 Super Sport 175cc 175cc 4-stroke OHC single [62mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI Americano 250cc 204cc 4-stroke OHC single [67mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI Scrambler 175cc 175cc 4-stroke OHC single [62mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI Scrambler 250cc 204cc 4-stroke OHC single [67mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 DUCATI Super Sport 250cc 204cc 4-stroke OHC single [67mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 DUCATI Diana 250cc 249cc 4-stroke OHC single [74mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 DUCATI Monza 250cc 249cc 4-stroke OHC single [74mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1963 DUCATI Monza Diana 250cc 249cc 4-stroke OHC single [74mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 DUCATI Diana 250cc 249cc 4-stroke OHC single [74mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 DUCATI Falcon 80cc 80cc 2-stroke single [47mm bore x 46.1mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 DUCATI Falcon 100cc 87cc 2-stroke single [49mm bore x 46.1mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 DUCATI Mountaineer 100cc 87cc 2-stroke single [49mm bore x 46.1mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 DUCATI Sebring 360cc 340cc 4-stroke OHC single [76mm bore x 75mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1968 DUCATI Scrambler 250cc 249cc 4-stroke OHC single [74mm bore x 57.8mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 DUCATI Scrambler 360cc 340cc 4-stroke OHC single [76mm bore x 75mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1969 DUCATI Desmo Diana 360cc 340cc 4-stroke OHC single [76mm bore x 75mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1970 DUCATI 250 Desmo 250cc 249cc 4-stroke OHV single [74mm bore x 57.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 DUCATI 450 Desmo 500cc 436cc 4-stroke OHV single [86mm bore x 75mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1970 DUCATI 450 Scrambler 500cc 436cc 4-stroke OHV single [86mm bore x 75mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 DUCATI 750GT 750cc 748cc 4-stroke AC twin [80mm bore x 74.4mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 DUCATI 750cc SS 750cc 748cc 4-stroke twin [80mm bore x 74.4mm stroke] Bulletin #61, 6/4/1982 1969-1976 era 750cc
1978 DUCATI 900SS 1000cc 864cc 4-stroke twin [86mm bore x 74.4mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1982 DUCATI Pantah 650cc 650cc 4-stroke twin [82mm bore x 61.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1982 DUCATI Pantah 750cc 748cc 4-stroke twin [88mm bore x 61.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1949 FRANCIS BARNETT Falcon 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1949 FRANCIS BARNETT Merlin 125cc 122cc 2-stroke single [50mm bore x 62mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1969 GARELLI KL100 100cc 98cc 2-stroke single [48mm bore x 54mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 GARELLI KL125 125cc 124cc 4-stroke single [54mm bore x 54mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 GARELLI KL150 175cc 148cc 4-stroke OHV single [58mm bore x 56mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1967 GILERA Estrada 125cc 123cc 4-stroke OHV single [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 GREEVES 20S Scrambler 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 GREEVES 20T Trials 250cc 197cc 2-stroke single [59mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 GREEVES 24DB 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 GREEVES MCS 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 GREEVES SCS 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 GREEVES 24MDS 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 GREEVES 24TE 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 GREEVES 25DC 250cc 250cc 2-stroke twin [50mm bore x 63.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 GREEVES 24 MX Challenger 250cc 232cc 2-stroke single [64mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 GREEVES 24MX Challenger 250cc 232cc 2-stroke single [64mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1978 GTR NRE 1 750cc 742cc 4-stroke twin [73.04mm bore x 88.5mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1948 HARLEY-DAVIDSON F 1310cc 1206cc 4-stroke OHV twin [87.3mm bore x 100.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1948 HARLEY-DAVIDSON FL 1310cc 1206cc 4-stroke OHV twin [87.3mm bore x 100.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1948 HARLEY-DAVIDSON U 1310cc 1208cc 4-stroke SV twin [84.1mm bore x 108.7mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1948 HARLEY-DAVIDSON UL 1310cc 1208cc 4-stroke SV twin [84.1mm bore x 108.7mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1948 HARLEY-DAVIDSON W 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1948 HARLEY-DAVIDSON WL 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 HARLEY-DAVIDSON WR 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 HARLEY-DAVIDSON WRTT 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 HARLEY-DAVIDSON EL 1000cc 988cc 4-stroke OHV twin [84.1mm bore x 88.9mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1952 HARLEY-DAVIDSON K 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 HARLEY-DAVIDSON KR 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 HARLEY-DAVIDSON KRTT 750cc 742cc 4-stroke SV twin [69.9mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 HARLEY-DAVIDSON KH 1000cc 890cc 4-stroke SV twin [69.9mm bore x 115.9mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1954 HARLEY-DAVIDSON KHRM 1000cc 890cc 4-stroke SV twin [69.9mm bore x 115.9mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1954 HARLEY-DAVIDSON KHRTT 1000cc 890cc 4-stroke SV twin [69.9mm bore x 115.9mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 HARLEY-DAVIDSON 165 175cc 165cc 2-stroke single [60.3mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 HARLEY-DAVIDSON FL 1310cc 1206cc 4-stroke OHV twin [87.3mm bore x 100.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 HARLEY-DAVIDSON FLH 1310cc 1206cc 4-stroke OHV twin [87.3mm bore x 100.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 HARLEY-DAVIDSON Hummer 125cc 125cc 2-stroke single [52.4mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 HARLEY-DAVIDSON KHRTT 1000cc 890cc 4-stroke SV twin [69.9mm bore x 115.9mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 HARLEY-DAVIDSON Sportster 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 HARLEY-DAVIDSON XL 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 HARLEY-DAVIDSON XLC 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 HARLEY-DAVIDSON XLCH 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 HARLEY-DAVIDSON XLH 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 HARLEY-DAVIDSON XLRTT 1000cc 886cc 4-stroke OHV twin [76.3mm bore x 96.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 HARLEY-DAVIDSON B 125cc 125cc 2-stroke single [52.4mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HARLEY-DAVIDSON ST 175cc 165cc 2-stroke single [60.3mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HARLEY-DAVIDSON STU 175cc 165cc 2-stroke single [60.3mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 HARLEY-DAVIDSON BT 175cc 165cc 2-stroke single [60.3mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HARLEY-DAVIDSON Sprint C 250cc 246cc 4-stroke OHV single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HARLEY-DAVIDSON Sprint CR Road Racer 250cc 246cc 4-stroke OHV single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 HARLEY-DAVIDSON BT Pacer 175cc 176cc 2-stroke single [60.5mm bore x 61.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 HARLEY-DAVIDSON BTF Ranger 175cc 166cc 2-stroke single [60.5mm bore x 57.9mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 HARLEY-DAVIDSON BTH Scat 175cc 176cc 2-stroke single [60.5mm bore x 61.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 HARLEY-DAVIDSON H Sprint 250cc 246cc 4-stroke OHV single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1963 HARLEY-DAVIDSON BT Pacer 175cc 176cc 2-stroke single [60.5mm bore x 61.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1963 HARLEY-DAVIDSON BTH Scat 175cc 176cc 2-stroke single [60.5mm bore x 61.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1963 HARLEY-DAVIDSON BTU Pacer 175cc 176cc 2-stroke single [60.5mm bore x 61.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 HARLEY-DAVIDSON Sprint CR 250cc 246cc 4-stroke OHV single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 HARLEY-DAVIDSON CRS 250cc 246cc 4-stroke OHV single [66mm bore x 72mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HARLEY-DAVIDSON CR Sprint 250cc 248cc 4-stroke OHV single [72mm bore x 61mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HARLEY-DAVIDSON M50 50cc 50cc 2-stroke single [38.8mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HARLEY-DAVIDSON M50 Sport 50cc 50cc 2-stroke single [38.8mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 HARLEY-DAVIDSON CRS 250cc 248cc 4-stroke OHV single [72mm bore x 61mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 HARLEY-DAVIDSON H Sprint 250cc 248cc 4-stroke OHV single [72mm bore x 61mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 HARLEY-DAVIDSON M65 80cc 64cc 2-stroke single [44mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 HARLEY-DAVIDSON ML 125cc 124cc 2-stroke single [56.1mm bore x 50mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 HARLEY-DAVIDSON XLH 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 5/15/1968 Hot Rod Multis
1969 HARLEY-DAVIDSON 750 Sportster 750cc 748cc 4-stroke OHV twin [76.3mm bore x 81.8mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1969 HARLEY-DAVIDSON ERS Scrambler 360cc 344cc 4-stroke single [74mm bore x 80mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1969 HARLEY-DAVIDSON SS Sprint 360cc 344cc 4-stroke single [74mm bore x 80mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1970 HARLEY-DAVIDSON MSR 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 HARLEY-DAVIDSON SS 750cc 688cc 4-stroke twin [74mm bore x 80mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1970 HARLEY-DAVIDSON XLCH 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 10/2/1973 Hot Rod Multis
1970 HARLEY-DAVIDSON XLH 1000cc 882cc 4-stroke OHV twin [76.2mm bore x 96.8mm stroke] Bulletin #61, 10/2/1973 Hot Rod Multis
1970 HARLEY-DAVIDSON XR 750cc 748cc 4-stroke OHV twin [76.3mm bore x 81.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 HARLEY-DAVIDSON XR750 750cc 750cc 4-stroke OHV twin [79.4mm bore x 75.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 HARLEY-DAVIDSON SR100 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 HARLEY-DAVIDSON SS350 360cc 344cc 4-stroke single [74mm bore x 80mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 HARLEY-DAVIDSON SX350 360cc 344cc 4-stroke single [74mm bore x 80mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 HARLEY-DAVIDSON TX125 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 HARLEY-DAVIDSON X90 100cc 90cc 2-stroke single [48mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 HARLEY-DAVIDSON Z90 100cc 90cc 2-stroke single [48mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 HARLEY-DAVIDSON RR250 250cc 246cc 2-stroke WC twin [56mm bore x 50mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1974 HARLEY-DAVIDSON SR100 100cc 98cc 2-stroke AC single [50mm bore x 50mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 HARLEY-DAVIDSON SX125 125cc 123cc 2-stroke AC single [56mm bore x 50mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 HARLEY-DAVIDSON SX175 175cc 174cc 2-stroke AC single [61mm bore x 59.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 HARLEY-DAVIDSON SX250 250cc 243cc 2-stroke single [72mm bore x 59.6mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 HARLEY-DAVIDSON 500WC Varese 500cc 488cc 2-stroke WC twin [72mm bore x 60mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1975 HARLEY-DAVIDSON MX250 250cc 243cc 2-stroke single [72mm bore x 59.6mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1975 HARLEY-DAVIDSON RR250 250cc 246cc 2-stroke WC twin [56mm bore x 50mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 360cc
1976 HARLEY-DAVIDSON MX360 360cc 342cc 2-stroke single [80mm bore x 68mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 360cc
1978 HARLEY-DAVIDSON XLCR1000 1000cc 998cc 4-stroke OHV twin [81mm bore x 96.8mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1984 HARLEY-DAVIDSON HD500R 500cc 494cc 4-stroke single [89mm bore x 79.4mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 500cc
1984 HARLEY-DAVIDSON HD560R 560cc 562cc 4-stroke single [94mm bore x 81mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1959 HERCULES J-BE-K 125cc 115cc 2-stroke single [52mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1975 HERCULES 125MX 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1975 HERCULES W-2000 Wankel 360cc 294cc Rotary [- bore x - stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1966 HODAKA Ace 90 100cc 90cc 2-stroke single [48mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 HODAKA Ace 90 100cc 90cc 2-stroke single [48mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 HODAKA Ace 100 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1952-1968 era 250cc
1970 HODAKA Ace 100/92A (100-B) 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 HODAKA Ace 100/MX 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HODAKA 125/94 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1959 HONDA C71 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HONDA CB71 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HONDA CB92 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HONDA CR71 Dream Super Sport 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HONDA CR76 Dream Super Sport 360cc 306cc 4-stroke OHC twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 HONDA Henly C90 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 HONDA Sports CB92 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CA100 50cc 49cc 4-stroke OHV single [40mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CA110 50cc 49cc 4-stroke OHV single [40mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CA72 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CA77 360cc 306cc 4-stroke OHC twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1961 HONDA CA95 175cc 154cc 4-stroke OHC twin [49mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CB72 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CB77 360cc 306cc 4-stroke OHC twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1961 HONDA CB95R 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CL72 250cc 248cc 4-stroke OHC twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 HONDA CL77 360cc 306cc 4-stroke OHC twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 HONDA CA105T 50cc 54cc 4-stroke OHV single [42mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 HONDA CB77 360cc 306cc 4-stroke OHC twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 HONDA CA200 100cc 87cc 4-stroke OHV single [49mm bore x 46mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 HONDA CB160 175cc 162cc 4-stroke OHC twin [50mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 HONDA CB450 500cc 444cc 4-stroke DOHC twin [70mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1965 HONDA S65 80cc 63cc 4-stroke OHC single [44mm bore x 41.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 HONDA S90 100cc 90cc 4-stroke OHC single [50mm bore x 45.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HONDA CA160 175cc 162cc 4-stroke OHC twin [50mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HONDA CL160 175cc 162cc 4-stroke OHC twin [50mm bore x 41mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HONDA CM91 100cc 90cc 4-stroke OHC single [50mm bore x 45.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 HONDA CT90 100cc 90cc 4-stroke OHC single [50mm bore x 45.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 HONDA CL90 100cc 88cc 4-stroke OHC single [50mm bore x 45mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 HONDA CA175 Tour 175cc 174cc 4-stroke OHC twin [52mm bore x 41mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 250cc
1968 HONDA CB350 Super 360cc 326cc 4-stroke OHC twin [64mm bore x 50.6mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 750cc
1968 HONDA CB450K1 500cc 444cc 4-stroke OHC twin [70mm bore x 57.8mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 750cc
1968 HONDA CL125 SCR 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 250cc
1968 HONDA CL175 SCR 175cc 174cc 4-stroke OHC twin [52mm bore x 41mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 250cc
1968 HONDA CL350 SCR 360cc 326cc 4-stroke OHC twin [64mm bore x 50.6mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 750cc
1968 HONDA CL450 500cc 444cc 4-stroke OHC twin [70mm bore x 57.8mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 750cc
1968 HONDA SS125 Super 125cc 124cc 4-stroke OHC twin [44mm bore x 41mm stroke] Bulletin #61, 3/1/1969 1952-1968 era 250cc
1970 HONDA CB750 750cc 736cc 4-stroke 4-cyl [61mm bore x 63mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1970 HONDA CB750K1 750cc 736cc 4-stroke 4-cyl [61mm bore x 63mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1970 HONDA SL100 100cc 99cc 4-stroke single [50.5mm bore x 49.5mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1970 HONDA SL350 360cc 326cc 4-stroke twin [64mm bore x 50.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1970 HONDA SL350K1 360cc 326cc 4-stroke twin [64mm bore x 50.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1970 HONDA SL90 100cc 90cc 4-stroke single [50mm bore x 45.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HONDA CB350 Four 360cc 348cc 4-stroke 4-cyl [47mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1972 HONDA CB500K1 500cc 500cc 4-stroke 4-cyl [56mm bore x 50.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 HONDA SL125K1 125cc 122cc 4-stroke single [56mm bore x 49.5mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HONDA XL250 250cc 249cc 4-stroke single [74mm bore x 57.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 HONDA CR125M 125cc 123cc 2-stroke AC single [56mm bore x 50mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1973 HONDA CR250M 250cc 248cc 2-stroke single [70mm bore x 64.4mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 HONDA MT125 125cc 123cc 2-stroke AC single [56mm bore x 50mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1973 HONDA MT250 250cc 248cc 2-stroke AC single [70mm bore x 64.4mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1973 HONDA XL175 175cc 174cc 4-stroke AC single [64mm bore x 54mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1973 HONDA XL350 360cc 348cc 4-stroke AC single [79mm bore x 71mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1973 HONDA XR75 80cc 72cc 4-stroke single [47mm bore x 41.4mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 HONDA CB200 250cc 198cc 4-stroke AC twin [55.5mm bore x 41mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1974 HONDA CB360 360cc 356cc 4-stroke AC twin [67mm bore x 50.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1974 HONDA CB550 560cc 544cc 4-stroke AC 4-cyl [58.5mm bore x 50.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 HONDA MR50 50cc 50cc 2-stroke AC single [40mm bore x 39.7mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1975 HONDA CB400F 500cc 408cc 4-stroke 4-cyl [51mm bore x 50mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 HONDA CB500T 500cc 498cc 4-stroke twin [70mm bore x 64.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 HONDA CB550F 560cc 544cc 4-stroke 4-cyl [58.5mm bore x 50.6mm stroke] Bulletin #61, 6/4/1982 1969-1976 era 750cc
1975 HONDA CB750F 750cc 736cc 4-stroke 4-cyl [61mm bore x 63mm stroke] Bulletin #61, 6/4/1982 1969-1976 era 750cc
1975 HONDA CR250M1 250cc 248cc 2-stroke single [70mm bore x 64.4mm stroke] Bulletin #61, 6/22/1989 1969-1976 era 250cc
1975 HONDA GL1000 1000cc 1000cc 4-stroke WC 4-cyl [72mm bore x 61.4mm stroke] Bulletin #61, 8/5/1975 Hot Rod Multis
1975 HONDA MR175 175cc 171cc 2-stroke single [66mm bore x 50mm stroke] Bulletin #61, 6/4/1982 1969-1976 era 250cc
1975 HONDA TL250 250cc 249cc 4-stroke single [74mm bore x 57.8mm stroke] Bulletin #61, 6/4/1982 1969-1976 era 250cc
1977 HONDA CB750F-77 750cc 736cc 4-stroke 4-cyl [61mm bore x 63mm stroke] Bulletin #61, 6/4/1982 Hot Rod Multis
1977 HONDA MT125-RII 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1978 HONDA CB400T1 500cc 396cc 4-stroke twin [70.5mm bore x 50.6mm stroke] Bulletin #61, 6/4/1982 Hot Rod Multis
1978 HONDA CR250R 250cc 248cc 2-stroke single [70mm bore x 64.4mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1978 HONDA CX500 500cc 496cc 4-stroke WC twin [78mm bore x 52mm stroke] Bulletin #61, 6/4/1982 Hot Rod Multis
1978 HONDA XL250S 250cc 249cc 4-stroke single [74mm bore x 57.8mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1979 HONDA CB750F 750cc 748cc 4-stroke 4-cyl [62mm bore x 62mm stroke] Bulletin #61, 6/4/1982 Hot Rod Multis
1979 HONDA XR500 500cc 498cc 4-stroke AC single [89mm bore x 80mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 500cc
1980 HONDA CR250R 250cc 248cc 2-stroke single [70mm bore x 64.4mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1981 HONDA CB900F 1000cc 900cc 4-stroke 4-cyl [64.5mm bore x 69mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1981 HONDA CR250R 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1981 HONDA CR450R 500cc 431cc 2-stroke single [85mm bore x 76mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1981 HONDA NS750 750cc 750cc 4-stroke WC twin [87mm bore x 63mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1981 HONDA XR500R 500cc 498cc 4-stroke AC single [89mm bore x 80mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 500cc
1982 HONDA CR480R 500cc 473cc 2-stroke single [89mm bore x 76mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1982 HONDA VF750 750cc 748cc 4-stroke 4-cyl [70mm bore x 48.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 HONDA CR250R 250cc 246cc 2-stroke single [66mm bore x 72mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1983 HONDA CR480R 500cc 473cc 2-stroke single [89mm bore x 76mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1983 HONDA RS750 750cc 750cc 4-stroke AC twin [79.5mm bore x 75.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1983 HONDA VF750F 750cc 748cc 4-stroke 4-cyl [70mm bore x 48.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 HONDA XL600R 600cc 589cc 4-stroke AC single [100mm bore x 75mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1983 HONDA XR500R 500cc 499cc 4-stroke AC single [92mm bore x 75mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 500cc
1985 HONDA CR250R 250cc 246cc 2-stroke WC single [66mm bore x 72mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 HONDA CR500R 500cc 491cc 2-stroke WC single [89mm bore x 79mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1985 HONDA RS500D 500cc 499cc 4-stroke AC single [92mm bore x 75mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 500cc
1985 HONDA RS500D (RS600D) 600cc 589cc 4-stroke AC single [100mm bore x 75mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1985 HONDA RS660D 660cc 662cc 4-stroke AC single [102.61mm bore x 80mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 HONDA CR125R 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 HONDA CR250R 250cc 249cc 2-stroke WC single [66.4mm bore x 72mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 HONDA CR500R 500cc 491cc 2-stroke WC single [89mm bore x 79mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 HONDA VFR750R 750cc 748cc 4-stroke 4-cyl [70mm bore x 48.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1987 HONDA CR125 125cc 125cc 2-stroke WC single [54mm bore x 54.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 HONDA CR250 250cc 250cc 2-stroke WC single [66.5mm bore x 72mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 HONDA CR500 500cc 491cc 2-stroke WC single [89mm bore x 79mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1988 HONDA CR125 125cc 125cc 2-stroke WC single [54mm bore x 54.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 HONDA CR250 250cc 249cc 2-stroke single [66.4mm bore x 72mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1955 HOREX Imperator 500cc 392cc 4-stroke OHC twin [61.5mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1968 HUSQVARNA Husky 250cc 245cc 2-stroke single [69.5mm bore x 64.5mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 HUSQVARNA Viking 360cc 351cc 2-stroke single [78.75mm bore x 72mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1972 HUSQVARNA 125CR M-X 125cc 124cc 2-stroke single [55mm bore x 52mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HUSQVARNA 250CR M-X 250cc 245cc 2-stroke single [69.5mm bore x 64.5mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HUSQVARNA 250CR M-X 360cc 341cc 2-stroke single [82mm bore x 64.5mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1972 HUSQVARNA 250CR M-X 360cc 350cc 2-stroke single [81.5mm bore x 67mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1972 HUSQVARNA 250CR M-X 360cc 351cc 2-stroke single [78.75mm bore x 72mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1972 HUSQVARNA 250WR M-X 250cc 245cc 2-stroke single [69.55mm bore x 64.5mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 HUSQVARNA 400CR M-X 500cc 396cc 2-stroke single [81.5mm bore x 76mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 HUSQVARNA 450WR Cross Country 500cc 454cc 2-stroke single [84mm bore x 82mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1975 HUSQVARNA 175cc 175cc 157cc 2-stroke single [62mm bore x 52mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 HUSQVARNA 250CR 250cc 245cc 2-stroke single [69.5mm bore x 64.5mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1975 HUSQVARNA 360CR 360cc 350cc 2-stroke single [81.5mm bore x 67mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1986 HUSQVARNA - 500cc 488cc 2-stroke single [86mm bore x 84mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 HUSQVARNA 250MX 250cc 245cc 2-stroke single [69.5mm bore x 64.5mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 HUSQVARNA 250CR 250cc 246cc 2-stroke WC single [66.5mm bore x 70.8mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1948 INDIAN CZ 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1948 INDIAN Scout 750cc 744cc 4-stroke SV twin [73mm bore x 88.9mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 INDIAN Scout 500cc 436cc 4-stroke OHV twin [60.3mm bore x 76.2mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 INDIAN Chief 1310cc 1310cc 4-stroke SV twin [82.6mm bore x 122.2mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1950 INDIAN Warrior 500cc 498cc 4-stroke OHV twin [64.5mm bore x 76.2mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1955 INDIAN Fire Arrow 250cc 248cc 4-stroke OHV single [64mm bore x 77mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1955 INDIAN Trailblazer 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1955 INDIAN Woodsman 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1956 INDIAN Scrambler 360cc 346cc 4-stroke OHV single [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 INDIAN Apache 750cc 690cc 4-stroke OHV twin [69.9mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 INDIAN Hounds Arrow 250cc 248cc 4-stroke OHV single [64mm bore x 77mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 INDIAN Lance 175cc 148cc 2-stroke single [56mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 INDIAN Tomahawk 560cc 510cc 4-stroke OHV twin [69.9mm bore x 66.4mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 INDIAN Westerner 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 INDIAN Apache Intercepter 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 INDIAN Arrow 250cc 218cc 4-stroke OHV single [60.3mm bore x 76.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 INDIAN Chief 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 INDIAN Hounds Arrow 250cc 248cc 4-stroke OHV single [69.9mm bore x 64.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 INDIAN Tomahawk 500cc 496cc 4-stroke OHV twin [69.9mm bore x 64.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 JAMES MK2F Comet 100cc 99cc 2-stroke AC single [47mm bore x 57mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAMES L25S Scrambler 250cc 248cc 2-stroke single [65.9mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAMES L25T Trials 250cc 248cc 2-stroke single [65.9mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1954 JAWA 500 500cc 488cc 4-stroke OHC twin [65mm bore x 73.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 JAWA 356 Road 175cc 172cc 2-stroke single [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA 958 Scrambler 175cc 172cc 2-stroke single [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA CZ Road 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA CZ Scrambler 360cc 344cc 2-stroke twin [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 JAWA CZ353 Roadster 250cc 249cc 2-stroke single [65mm bore x 75mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA CZ353 Scr. 250cc 249cc 2-stroke AC single [65mm bore x 75mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA CZ354 Roadster 360cc 344cc 2-stroke twin [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 JAWA CZ557 MotoX 250cc 249cc 2-stroke single [65mm bore x 75mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 JAWA CZ558 MotoX 360cc 344cc 2-stroke twin [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 JAWA CZ957 Scr. 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 JAWA 450 175cc 172cc 2-stroke single [58mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 JAWA 453 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 JAWA 579/01 MotoX 250cc 249cc 2-stroke single [65mm bore x 75mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1969 JAWA-CZ 980 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1969 JAWA-CZ 980 360cc 357cc 2-stroke single [79.5mm bore x 72mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1966 KAWASAKI W1 650cc 624cc 4-stroke OHV twin [74mm bore x 72.6mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1967 KAWASAKI A1 250cc 248cc 2-stroke twin [53mm bore x 56mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 KAWASAKI A1R 250cc 248cc 2-stroke twin [53mm bore x 56mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 KAWASAKI C2 125cc 116cc 2-stroke single [53.1mm bore x 52.6mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1967 KAWASAKI D1 100cc 100cc 2-stroke single [52mm bore x 47mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 KAWASAKI F1 175cc 169cc 2-stroke single [62mm bore x 56mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 KAWASAKI F2 175cc 169cc 2-stroke single [62mm bore x 56mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 KAWASAKI F21M 250cc 239cc 2-stroke single [70mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 KAWASAKI A7 360cc 338cc 2-stroke twin [62mm bore x 56mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1968 KAWASAKI W2SS 650cc 624cc 4-stroke OHV twin [74mm bore x 72.6mm stroke] Bulletin #61, 5/15/1968 Hot Rod Multis
1969 KAWASAKI F3 175cc 169cc 2-stroke single [62mm bore x 56mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 KAWASAKI F4 250cc 239cc 2-stroke single [70mm bore x 62mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 KAWASAKI G3 100cc 90cc 2-stroke single [47mm bore x 51.8mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 KAWASAKI H1 500cc 498cc 2-stroke triple [60mm bore x 58.8mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1970 KAWASAKI F5 360cc 347cc 2-stroke single [80.5mm bore x 68.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1970 KAWASAKI F9 360cc 347cc 2-stroke single [80.5mm bore x 68.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1970 KAWASAKI G31M 100cc 99cc 2-stroke single [49.3mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 KAWASAKI G4TR 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 KAWASAKI 100G3TRA 100cc 100cc 2-stroke single [49.5mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 KAWASAKI F6 125E 125cc 125cc 2-stroke single [52mm bore x 58.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 KAWASAKI F7 175E 175cc 175cc 2-stroke single [61.5mm bore x 58.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 KAWASAKI F8 (250 Enduro) 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 KAWASAKI F9 360cc 347cc 2-stroke single [80.5mm bore x 68.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1972 KAWASAKI F9 360cc 355cc 2-stroke single [81.5mm bore x 68mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1972 KAWASAKI G5 100cc 100cc 2-stroke single [49.5mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 KAWASAKI H2 750cc 747cc 2-stroke triple [71mm bore x 63mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 KAWASAKI S2 360cc 348cc 2-stroke AC triple [53.1mm bore x 52.3mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 KAWASAKI F11 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 KAWASAKI KX125 125cc 125cc 2-stroke single [56mm bore x 50.6mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1973 KAWASAKI KX250 250cc 250cc 2-stroke single [70mm bore x 64.9mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1973 KAWASAKI KX250 (domestic model) 250cc 246cc 2-stroke single [69.5mm bore x 64.9mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1973 KAWASAKI KX450 500cc 441cc 2-stroke single [86mm bore x 76mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1973 KAWASAKI S1 250cc 249cc 2-stroke triple [45mm bore x 52.3mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 KAWASAKI Z1 1000cc 904cc 4-stroke 4-cyl [66mm bore x 66mm stroke] Bulletin #61, 10/2/1973 Hot Rod Multis
1974 KAWASAKI G3SSD 100cc 90cc 2-stroke single [47mm bore x 51.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI G4TRD 100cc 100cc 2-stroke single [49.5mm bore x 51.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI G5B 100cc 100cc 2-stroke single [49.5mm bore x 51.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI H2-S (Expert Comp) 750cc 747cc 2-stroke triple [71mm bore x 63mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1974 KAWASAKI KS125 125cc 125cc 2-stroke single [56mm bore x 50.6mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI KZ400 500cc 398cc 4-stroke twin [64mm bore x 62mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1974 KAWASAKI MC1 100cc 90cc 2-stroke AC single [47mm bore x 51.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI MC1 M 100cc 90cc 2-stroke single [47mm bore x 51.8mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 KAWASAKI S3 500cc 399cc 2-stroke triple [57mm bore x 52.3mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1974 KAWASAKI Z1A 1000cc 904cc 4-stroke 4-cyl [66mm bore x 66mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1974 KAWASAKI Z2 (Expert Comp) 750cc 748cc 4-stroke OHC 4-cyl [64mm bore x 58mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 KAWASAKI KR250 250cc 250cc 2-stroke WC twin [54mm bore x 54.4mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1975 KAWASAKI KR750 750cc 741cc 2-stroke WC triple [68mm bore x 68mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 KAWASAKI KX400 500cc 401cc 2-stroke single [82mm bore x 76mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 KAWASAKI Z1B 1000cc 904cc 4-stroke 4-cyl [66mm bore x 66mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1976 KAWASAKI KZ750 750cc 746cc 4-stroke twin [78mm bore x 78mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1976 KAWASAKI KZ900 1000cc 904cc 4-stroke 4-cyl [66mm bore x 66mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1977 KAWASAKI KX250 250cc 250cc 2-stroke single [70mm bore x 64.9mm stroke] Bulletin #61, 6/20/1978 1977-1988 era 250cc
1977 KAWASAKI KZ1000 1310cc 1016cc 4-stroke 4-cyl [70mm bore x 66mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 KAWASAKI KZ650 650cc 652cc 4-stroke 4-cyl [62mm bore x 54mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1978 KAWASAKI KZ1000 1310cc 1016cc 4-stroke 4-cyl [70mm bore x 66mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1978 KAWASAKI KZ1000 Z1R 1310cc 1016cc 4-stroke 4-cyl [70mm bore x 66mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1979 KAWASAKI KZ1000 1310cc 1016cc 4-stroke 4-cyl [70mm bore x 66mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1979 KAWASAKI KZ650 650cc 652cc 4-stroke 4-cyl [62mm bore x 54mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1980 KAWASAKI KX250-A6 250cc 250cc 2-stroke single [70mm bore x 64.9mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1980 KAWASAKI KX420-A1 500cc 422cc 2-stroke single [83mm bore x 78mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1980 KAWASAKI KZ750E 750cc 740cc 4-stroke 4-cyl [66mm bore x 54mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1981 KAWASAKI KZ1000-JE 1000cc 1000cc 4-stroke 4-cyl [69.4mm bore x 66mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1982 KAWASAKI KX250-B1 250cc 250cc 2-stroke single [70mm bore x 64.9mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1982 KAWASAKI KX500 500cc 500cc 2-stroke single [86mm bore x 86mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1982 KAWASAKI KZ1000-R1 1000cc 1000cc 4-stroke 4-cyl [69.4mm bore x 66mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1982 KAWASAKI KZ750 R&L 750cc 740cc 4-stroke 4-cyl [66mm bore x 54mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 KAWASAKI ZX750-A 750cc 740cc 4-stroke 4-cyl [66mm bore x 54mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1985 KAWASAKI KX125-D1 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 KAWASAKI KX250-D1 250cc 250cc 2-stroke WC single [70mm bore x 64.9mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 KAWASAKI KX500-B1 500cc 500cc 2-stroke WC single [86mm bore x 86mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 KAWASAKI KL600B2 560cc 565cc 4-stroke single [96mm bore x 78mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 KAWASAKI KX125-E1 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 KAWASAKI KX250-D2 250cc 250cc 2-stroke WC single [70mm bore x 64.9mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 KAWASAKI KX500-B2 500cc 500cc 2-stroke WC single [86mm bore x 86mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1987 KAWASAKI KX125-E2 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 KAWASAKI KX250-E1 250cc 250cc 2-stroke WC single [67.4mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 KAWASAKI KX500-C1 500cc 500cc 2-stroke WC single [86mm bore x 86mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1987 KAWASAKI ZX750-F1 750cc 748cc 4-stroke 4-cyl [68mm bore x 51.5mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1988 KAWASAKI KX125-F1 125cc 125cc 2-stroke WC single [56mm bore x 50.6mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 KAWASAKI KX250-F1 250cc 250cc 2-stroke WC single [67.4mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 KAWASAKI KX500-D1 500cc 500cc 2-stroke WC single [86mm bore x 86mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 KTM 125MX 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 KTM 250MX 250cc 247cc 2-stroke WC single [67.5mm bore x 69mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 KTM 500MX 500cc 485cc 2-stroke WC single [89mm bore x 78mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1974 LAVERDA 3CL 1000cc 981cc 4-stroke triple [75mm bore x 74mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1956 MAICO Scrambler 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 MAICO Scrambler 175cc 174cc 2-stroke single [61mm bore x 59.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MAICO Endro 360cc 345cc 2-stroke single [77mm bore x 74mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1967 MAICO Endro 360cc 354cc 2-stroke single [77mm bore x 76mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1970 MAICO T-5 250 250cc 247cc 2-stroke AC single [67mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 MAICO X-5 400 500cc 386cc 2-stroke AC single [77mm bore x 83mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 MAICO K501 500cc 501cc 2-stroke single [91.6mm bore x 76mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 MAICO 250 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1973 MAICO 400 500cc 386cc 2-stroke single [77mm bore x 83mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1973 MAICO 450 500cc 438cc 2-stroke single [82mm bore x 83mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1981 MAICO Mega 2 Type 352 500cc 488cc 2-stroke single [86.5mm bore x 83mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1981 MAICO Mega 2-250 Reed Valve 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1949 MATCHLESS G3L 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 MATCHLESS G3LS Clubman 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 MATCHLESS G80 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 MATCHLESS G80S Clubman 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 MATCHLESS G9 Super Clubman 500cc 498cc 4-stroke OHV twin [66mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 MATCHLESS G3LC Clubman 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 MATCHLESS G9 Super Clubman 500cc 498cc 4-stroke OHV twin [66mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1952 MATCHLESS G3LCS 360cc 348cc 4-stroke OHV single [69mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 MATCHLESS G80C 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 MATCHLESS G80CS Comp. 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 MATCHLESS G9B 560cc 544cc 4-stroke OHV twin [69mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1956 MATCHLESS G11 600cc 592cc 4-stroke OHV twin [72mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 MATCHLESS G11CS 600cc 592cc 4-stroke OHV twin [72mm bore x 72.8mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1957 MATCHLESS G80CS 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 MATCHLESS G80R 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 MATCHLESS G80S 500cc 497cc 4-stroke OHV single [82.5mm bore x 93mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1958 MATCHLESS G12 Super Clubman 650cc 646cc 4-stroke OHV twin [72mm bore x 79.35mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 MATCHLESS G12 Super Hurricane 650cc 646cc 4-stroke OHV twin [72mm bore x 79.35mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 MATCHLESS G80CS MotoX 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1958 MATCHLESS G80CST Typhoon 600cc 597cc 4-stroke OHV single [89mm bore x 96mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1958 MATCHLESS Road Trim 250cc 246cc 4-stroke OHV single [70mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 MATCHLESS Scrambler 250cc 246cc 4-stroke OHV single [70mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 MATCHLESS G12 Road Clubman 650cc 646cc 4-stroke OHV twin [72mm bore x 79.3mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 MATCHLESS G12CS Scrambler 650cc 646cc 4-stroke OHV twin [72mm bore x 79.3mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 MATCHLESS G2CS Scrambler 250cc 249cc 4-stroke OHV single [69.85mm bore x 64.85mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 MATCHLESS G80TCS Typhoon 600cc 588cc 4-stroke OHV single [87.3mm bore x 98.2mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1959 MATCHLESS Road Model 250cc 249cc 4-stroke OHV single [69.85mm bore x 64.85mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 MATCHLESS G12 Trailblazer 650cc 646cc 4-stroke OHV twin [72mm bore x 79.3mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 MATCHLESS G12CSR Apache 650cc 646cc 4-stroke OHV twin [72mm bore x 79.3mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 MATCHLESS G80CS Westerner 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 MATCHLESS G80CS Woodsman 500cc 497cc 4-stroke OHV single [86mm bore x 85.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 MATCHLESS G80TCS Typhoon 600cc 596cc 4-stroke OHV single [88.9mm bore x 96mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1960 MATCHLESS G9CS Tomahawk 500cc 496cc 4-stroke OHV twin [66mm bore x 72.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 MATCHLESS Pinto G1 175cc 170cc 2-stroke AC single [62.69mm bore x 55mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 MATCHLESS G50CSR 500cc 496cc 4-stroke OHC single [90mm bore x 78mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1969 MB 100 SCRF 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1969 MB XC 100 SCR 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1958 MONTESA BR10-91 125cc 125cc 2-stroke single [51.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 MONTESA BR10-110 125cc 125cc 2-stroke single [51.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 MONTESA Impala Scrambler 175cc 175cc 2-stroke single [60.9mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 MONTESA Impala Sport 175cc 175cc 2-stroke single [60.9mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 MONTESA MotoX Scrambler 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MONTESA Impala 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MONTESA LaCross 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MONTESA Scorpion 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1972 MONTESA 125 Cappra MX 18M 125cc 125cc 2-stroke single [51.5mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 MONTESA 250 Cappra MX-63M 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 MONTESA 250 King Scorpion 34M 250cc 248cc 2-stroke AC single [72.5mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 MONTESA Cota 123-28M 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 MONTESA Cota 247-21M 250cc 248cc 2-stroke single [72.5mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 MONTESA 250 Automix King Scorpion-44M 250cc 246cc 2-stroke AC single [70mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1973 MONTESA 250 Cappra VR-73M 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1976 MONTESA 360VA 360cc 350cc 2-stroke single [83.5mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 360cc
1952 MOTO GUZZI Falcone 500cc 499cc 4-stroke OHV single [88mm bore x 82mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 MOTO GUZZI Astore 500cc 499cc 4-stroke OHV single [88mm bore x 82mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 MOTO GUZZI Lodola Sport 175cc 175cc 4-stroke OHC single [62mm bore x 57.8mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1970 MOTO GUZZI Ambassador 750 750cc 758cc 4-stroke OHV twin [83mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1976 MOTO GUZZI 850 Le Mans 1000cc 844cc 4-stroke OHV twin [83mm bore x 78mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1978 MOTO GUZZI 850 Le Mans 1000cc 844cc 4-stroke twin [83mm bore x 78mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1985 MOTO GUZZI 1000 Le Mans 1000cc 948cc 4-stroke twin [88mm bore x 78mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1965 MOTO MORINI DD 100cc 98cc 4-stroke OHV single [50mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI EV 125cc 123cc 4-stroke OHV single [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI PT Corsarino 175cc 143cc 4-stroke OHV single [58mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI Scrambler 125cc 123cc 4-stroke OHV single [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI Z 80cc 61cc 4-stroke OHV single [44mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI ZT Corsarino 80cc 66cc 4-stroke OHV single [46mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 MOTO MORINI ZZ 80cc 61cc 4-stroke OHV single [44mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MOTO MORINI Tornado 250cc 247cc 4-stroke OHV single [69mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 MOTO MORINI Typhoon 250cc 247cc 4-stroke OHV single [69mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1980 MOTO MORINI 500 500cc 478cc 4-stroke twin [69mm bore x 64mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1975 MOTO VILLA FV CR250 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1975 MOTO VILLA FV CR360 360cc 326cc 2-stroke single [80.5mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 360cc
1976 MOTO VILLA 450 500cc 448cc 2-stroke single [85mm bore x 79mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1960 MOTOBI Catria 175cc 172cc 4-stroke OHV single [62mm bore x 57mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 MOTOBI Catria Sport 125cc 124cc 4-stroke OHV single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1963 MOTOBI Sprite 250cc 198cc 4-stroke OHV single [66.5mm bore x 57mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 MOTOM - 50cc 51cc 4-stroke OHV single [40.2mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1952 MUSTANG Catalina 360cc 319cc 4-stroke SV single [73mm bore x 76.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1952 MUSTANG Special 360cc 319cc 4-stroke SV single [73mm bore x 76.2mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1949 NORTON 18 500cc 490cc 4-stroke OHV single [79mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 16H 500cc 490cc 4-stroke SV single [79mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 30 International 500cc 490cc 4-stroke OHC single [79mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 30 Manx 500cc 498cc 4-stroke OHC single [79.62mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 40 International 360cc 348cc 4-stroke OHC single [71mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 40 Manx 360cc 348cc 4-stroke OHC single [71mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON 7 Dominator 500cc 496cc 4-stroke OHV twin [66mm bore x 72.6mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON Big 4 600cc 597cc 4-stroke SV single [82mm bore x 113mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 NORTON ES2 500cc 490cc 4-stroke OHV single [79mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1953 NORTON 500T 500cc 490cc 4-stroke OHV single [79mm bore x 100mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 NORTON 88 Dominator 500cc 496cc 4-stroke OHV twin [66mm bore x 72.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 NORTON 99 600cc 596cc 4-stroke OHV twin [68mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 NORTON Jubilee 250cc 248cc 4-stroke OHV twin [60mm bore x 44mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 NORTON Nomad 600cc 596cc 4-stroke OHV twin [68mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1961 NORTON Manxman 650cc 646cc 4-stroke OHV twin [68mm bore x 89mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1962 NORTON 88SS 500cc 496cc 4-stroke OHV twin [66mm bore x 72.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 NORTON Atlas 750cc 744cc 4-stroke OHV twin [73mm bore x 89mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1964 NORTON Scrambler 750cc 744cc 4-stroke OHV twin [73mm bore x 89mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1967 NORTON P11 750cc 744cc 4-stroke OHV twin [73mm bore x 89mm stroke] Bulletin #61, 5/15/1968 Hot Rod Multis
1969 NORTON Commando 750cc 744cc 4-stroke OHV twin [73mm bore x 89mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1971 NORTON Commando "S" 750cc 744cc 4-stroke OHV twin [73mm bore x 89mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1974 NORTON Commando Short Stroke 750cc 748cc 4-stroke twin [77mm bore x 80.4mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1971 NORTON-AJS Y40 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1951 NSU Consul II 500cc 498cc 4-stroke OHV single [80mm bore x 99mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1957 NSU Maxi 175cc 175cc 4-stroke OHC single [62mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1957 NSU Super Max 250cc 247cc 4-stroke OHC single [69mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 NSU Maxi 175cc 175cc 4-stroke OHC single [62mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 NSU S20 Super Max 250cc 247cc 4-stroke OHC single [69mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 OSSA SE 175cc 175cc 2-stroke single [60.9mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 OSSA Scrambler 250cc 231cc 2-stroke single [70mm bore x 60mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1969 OSSA Pioneer M25 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 OSSA Stiletto M26 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1971 OSSA Pioneer 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 OSSA Stilleto (used in the DMR) 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 OSSA Phantom 250MX 250cc 244cc 2-stroke AC single [72mm bore x 60mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1977 OSSA GPIII 250cc 244cc 2-stroke single [72mm bore x 60mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1961 PANNONIA TLF Standard 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1949 PANTHER 65 250cc 249cc 4-stroke OHV single [60mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 PANTHER 75 360cc 348cc 4-stroke OHV single [71mm bore x 88mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 PANTHER 100 600cc 594cc 4-stroke OHV single [87mm bore x 100mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1958 PARILLA Clipper 360cc 350cc 4-stroke OHV twin [62mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1958 PARILLA Grand Sport 175cc 174cc 4-stroke OHV single [59.8mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 PARILLA Phantom 100cc 98cc 4-stroke OHV single [50mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 PARILLA Speedster 175cc 174cc 4-stroke OHV single [59.8mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 PARILLA Wildcat Scr. 175cc 174cc 4-stroke OHV single [59.8mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA Antelope Scr. 125cc 124cc 4-stroke OHV single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA Hornet 50cc 49cc 4-stroke OHV single [40mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA MotoX 175cc 142cc 4-stroke OHV single [54mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA Ramjet 100cc 98cc 4-stroke OHV single [52mm bore x 46mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA Road Model 175cc 142cc 4-stroke OHV single [54mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 PARILLA Vanguard 125cc 124cc 4-stroke OHV single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 PARILLA Impala 175cc 175cc 4-stroke OHV single [62mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 PARILLA Grand Sport 250cc 199cc 4-stroke OHV single [64mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 PARILLA Scrambler 250cc 247cc 4-stroke OHV single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 PARILLA Speedster 250cc 199cc 4-stroke OHV single [64mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 PARILLA Trailmaster 250cc 247cc 4-stroke OHV single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 PARILLA Grand Sport 125cc 124cc 4-stroke OHV single [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 PARILLA Olimpa 125cc 109cc 4-stroke OHV single [55mm bore x 46mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 PARILLA Grand Sport 250cc 247cc 4-stroke OHV single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1972 PENTON 125 125cc 124cc 2-stroke single [54mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 PENTON 175 175cc 171cc 2-stroke single [63.5mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 PENTON Mint 400 360cc 356cc 2-stroke single [81mm bore x 69mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1973 PENTON-KTM 250cc 250cc 245cc 2-stroke single [71mm bore x 62mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1974 POWER-DYNE 360 Gringo 360cc 352cc 2-stroke AC single [80mm bore x 70mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1972 ROKON RT 340 360cc 334cc 2-stroke single [78mm bore x 70mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1950 ROYAL ENFIELD Bullet 360cc 346cc 4-stroke OHV single [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ROYAL ENFIELD Bullet Scrambler 360cc 346cc 4-stroke OHV single [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ROYAL ENFIELD G 360cc 346cc 4-stroke OHV single [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ROYAL ENFIELD J2 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ROYAL ENFIELD RE 125cc 125cc 2-stroke AC single [53.79mm bore x 55mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1950 ROYAL ENFIELD S51 250cc 248cc 4-stroke OHV single [64mm bore x 77mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 ROYAL ENFIELD Twin 500cc 496cc 4-stroke OHV twin [64mm bore x 77mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1954 ROYAL ENFIELD Bullet Scrambler 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 ROYAL ENFIELD Constellation 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 ROYAL ENFIELD Crusader 250cc 248cc 4-stroke OHV single [69.9mm bore x 64.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 ROYAL ENFIELD Fury Scrambler 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 ROYAL ENFIELD Fury Scrambler 360cc 346cc 4-stroke OHV single [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 ROYAL ENFIELD Intercepter 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 ROYAL ENFIELD Meteor Minor Twin 500cc 496cc 4-stroke OHV twin [64mm bore x 77mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 ROYAL ENFIELD Scrambler 250cc 248cc 4-stroke OHV single [69.9mm bore x 64.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 ROYAL ENFIELD Super Meteor 750cc 692cc 4-stroke OHV twin [70mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1961 ROYAL ENFIELD Fury F6 600cc 597cc 4-stroke OHV single [86mm bore x 102.7mm stroke] Bulletin #61, 5/15/1967 Hot Rod Singles
1962 ROYAL ENFIELD Crusader Super 5 250cc 248cc 4-stroke OHV single [70mm bore x 64.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1962 ROYAL ENFIELD Intercepter 750cc 736cc 4-stroke OHV twin [71mm bore x 93mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 RUMI Junior 125cc 124cc 2-stroke twin [42mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI 80K 80cc 80cc 2-stroke single [45mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI K11 80cc 80cc 2-stroke single [45mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI M12 50cc 50cc 2-stroke single [41mm bore x 38mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI S31 125cc 124cc 2-stroke twin [42mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI SKB 175cc 150cc 2-stroke twin [46mm bore x 45mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 SUZUKI T10 250cc 246cc 2-stroke twin [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 SUZUKI K15 80cc 80cc 2-stroke single [45mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 SUZUKI T20 Hustler 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 SUZUKI X6 Hustler 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1968 SUZUKI T500/5 500cc 492cc 2-stroke twin [70mm bore x 64mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1969 SUZUKI AC100 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 SUZUKI AS50 50cc 50cc 2-stroke single [41.1mm bore x 37.8mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 SUZUKI T125 125cc 124cc 2-stroke twin [42.9mm bore x 42.9mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1969 SUZUKI TC120 125cc 119cc 2-stroke single [52.1mm bore x 55.9mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 SUZUKI TR250 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1969 SUZUKI TR350 360cc 316cc 2-stroke twin [61mm bore x 54mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1969 SUZUKI TR500 500cc 492cc 2-stroke twin [70mm bore x 64mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1969 SUZUKI TS250 250cc 247cc 2-stroke AC single [70.1mm bore x 64mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1970 SUZUKI TC90 100cc 90cc 2-stroke single [47mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 SUZUKI TS90 100cc 90cc 2-stroke single [47mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 SUZUKI TM400R 500cc 396cc 2-stroke single [82mm bore x 74.9mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 SUZUKI TS125R 125cc 123cc 2-stroke single [55.9mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 SUZUKI TS185R 250cc 183cc 2-stroke single [64mm bore x 56.9mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 SUZUKI GT380J 360cc 372cc 2-stroke triple [54.1mm bore x 54.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 SUZUKI GT550J 560cc 543cc 2-stroke triple [61mm bore x 62mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 SUZUKI GT750J 750cc 741cc 2-stroke triple [70.1mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 SUZUKI RV90J 100cc 88cc 2-stroke single [50mm bore x 45mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1972 SUZUKI TC125J 125cc 123cc 2-stroke single [55.9mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 SUZUKI TM250J 250cc 247cc 2-stroke single [70.1mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 SUZUKI TS400J 500cc 396cc 2-stroke single [82mm bore x 74.9mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 SUZUKI GT185 250cc 184cc 2-stroke twin [47mm bore x 53.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 SUZUKI GT250 250cc 248cc 2-stroke twin [54.1mm bore x 54.1mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 SUZUKI RV125 125cc 123cc 2-stroke single [55.9mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 SUZUKI TC100 100cc 98cc 2-stroke single [49mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 SUZUKI TM125 125cc 123cc 2-stroke single [55.9mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1973 SUZUKI TS100 100cc 98cc 2-stroke single [49mm bore x 51.8mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1974 SUZUKI TM100 100cc 98cc 2-stroke single [50mm bore x 50mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 250cc
1974 SUZUKI TM75 80cc 73cc 2-stroke AC single [47mm bore x 42mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 250cc
1975 SUZUKI GT750S 750cc 738cc 2-stroke WC triple [70mm bore x 64mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1976 SUZUKI RM250A 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1976 SUZUKI RM250B 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1976 SUZUKI RM250C 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1976 SUZUKI RM370A 360cc 373cc 2-stroke single [77mm bore x 80mm stroke] Bulletin #61, 6/20/1978 1969-1976 era 750cc
1976 SUZUKI RM370B 360cc 373cc 2-stroke single [77mm bore x 80mm stroke] Bulletin #61, 6/20/1978 1969-1976 era 750cc
1977 SUZUKI GS400B 500cc 398cc 4-stroke twin [65mm bore x 60mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 SUZUKI GS400XB 500cc 398cc 4-stroke twin [65mm bore x 60mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 SUZUKI GS550B 560cc 548cc 4-stroke 4-cyl [56mm bore x 55.8mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 SUZUKI GS750B 750cc 748cc 4-stroke 4-cyl [65mm bore x 56.4mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1978 SUZUKI GS1000C 1000cc 984cc 4-stroke 4-cyl [70mm bore x 64mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1978 SUZUKI GS1000EC 1000cc 996cc 4-stroke WC 4-cyl [70mm bore x 64.8mm stroke] Bulletin #61B, 6/22/1989 Hot Rod Multis
1978 SUZUKI GS550 560cc 548cc 4-stroke 4-cyl [56mm bore x 55.8mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1978 SUZUKI GS750C 750cc 748cc 4-stroke 4-cyl [65mm bore x 56.4mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1978 SUZUKI GS750EC 750cc 748cc 4-stroke 4-cyl [65mm bore x 56.4mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1978 SUZUKI RM400C 500cc 402cc 2-stroke single [80mm bore x 80mm stroke] Bulletin #61, 6/20/1978 1977-1988 era 750cc
1979 SUZUKI GS1000S 1000cc 996cc 4-stroke 4-cyl [70mm bore x 64.8mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1979 SUZUKI RM250N 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1979 SUZUKI RM400N 500cc 417cc 2-stroke single [80mm bore x 83mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1980 SUZUKI GS750ET 750cc 748cc 4-stroke 4-cyl [67mm bore x 53mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1980 SUZUKI PE250T 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1981 SUZUKI DR500X 500cc 499cc 4-stroke single [88mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 500cc
1981 SUZUKI PE250X 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1982 SUZUKI GS1000SZ 1000cc 1000cc 4-stroke 4-cyl [69.4mm bore x 66mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 SUZUKI GS750ED 750cc 748cc 4-stroke 4-cyl [67mm bore x 53mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 SUZUKI GS750ESD 750cc 748cc 4-stroke 4-cyl [67mm bore x 53mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 SUZUKI GS750SD 750cc 748cc 4-stroke 4-cyl [67mm bore x 53mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1984 SUZUKI RM500E 500cc 492cc 2-stroke single [88.5mm bore x 80mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1985 SUZUKI GS700E 750cc 700cc 4-stroke 4-cyl [67mm bore x 49.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1985 SUZUKI GS700ESF 750cc 700cc 4-stroke 4-cyl [67mm bore x 49.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1985 SUZUKI RM125F 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 SUZUKI RM250F 250cc 246cc 2-stroke WC single [70mm bore x 64mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 SUZUKI SP600F 600cc 590cc 4-stroke single [94mm bore x 85mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 SUZUKI GSXR750G 750cc 748cc 4-stroke 4-cyl [70mm bore x 48.7mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1986 SUZUKI RM125G 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 SUZUKI RM250G 250cc 247cc 2-stroke WC single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 SUZUKI RM125H 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 SUZUKI RM250H 250cc 247cc 2-stroke WC single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 SUZUKI GSX600FJ 600cc 592cc 4-stroke 4-cyl [62.2mm bore x 48.7mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1988 SUZUKI GSXR750J 1000cc 816cc 4-stroke 4-cyl [73mm bore x 48.7mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1988 SUZUKI RM125J 125cc 124cc 2-stroke WC single [54mm bore x 54mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 SUZUKI RM250J 250cc 247cc 2-stroke WC single [67mm bore x 70mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1980 SWM RS250MC TF1 250cc 248cc 2-stroke single [72mm bore x 61mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1961 TOHATSU CA 50cc 49cc 2-stroke single [40mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 TOHATSU CA2 50cc 49cc 2-stroke single [40mm bore x 39mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 TOHATSU LD2 125cc 124cc 2-stroke twin [43mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 TOHATSU LD3 125cc 124cc 2-stroke twin [43mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1949 TRIUMPH 3T 360cc 348cc 4-stroke OHV twin [55mm bore x 73.4mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 TRIUMPH 5T Speed Twin 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 TRIUMPH Grand Prix 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 TRIUMPH T100 Tiger 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1949 TRIUMPH TR5 Trophy 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 TRIUMPH 6T Thunderbird 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1952 TRIUMPH T100 Tiger 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1953 TRIUMPH T15 Terrier 175cc 149cc 4-stroke OHV single [57mm bore x 58.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1954 TRIUMPH Tiger Cub 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1955 TRIUMPH T100R 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1956 TRIUMPH TR5R 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 TRIUMPH T100R/R 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 TRIUMPH T100RS 500cc 498cc 4-stroke OHV twin [63mm bore x 80mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1957 TRIUMPH T20C Cub 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1958 TRIUMPH 21 360cc 350cc 4-stroke OHV twin [58.25mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 TRIUMPH 3TA "21" 360cc 350cc 4-stroke OHV twin [58.25mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 TRIUMPH 5TA Speed Twin 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 TRIUMPH T110 Tiger 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 TRIUMPH T120 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1959 TRIUMPH T20 Road Model 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 TRIUMPH T20C Tiger Cub 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 TRIUMPH T20CA 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 TRIUMPH T20S 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 TRIUMPH TR6B 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 TRIUMPH 5TA Speed Twin 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 TRIUMPH T100A Tiger 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1960 TRIUMPH T110 Tiger 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 TRIUMPH T120 Bonneville 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1960 TRIUMPH TR7A Bonneville 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1961 TRIUMPH T120R 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1961 TRIUMPH T20SL 250cc 200cc 4-stroke OHV single [63mm bore x 64mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 TRIUMPH TR5AC 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1961 TRIUMPH TR5AR 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1963 TRIUMPH T120C 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1963 TRIUMPH T120R 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1963 TRIUMPH TR6C 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1963 TRIUMPH TR6R 650cc 650cc 4-stroke OHV twin [71mm bore x 82mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1967 TRIUMPH T100R 500cc 490cc 4-stroke OHV twin [69mm bore x 65.5mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1968 TRIUMPH TR25W 250cc 247cc 4-stroke OHV single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 TRIUMPH TR25W 360cc 343cc 4-stroke single [79mm bore x 70mm stroke] Bulletin #61, 8/5/1975 1952-1968 era 750cc
1968 TRIUMPH TR25W 360cc 352cc 4-stroke single [80mm bore x 70mm stroke] Bulletin #61, 8/5/1975 1952-1968 era 750cc
1968 TRIUMPH TR25W 360cc 356cc 4-stroke single [80.5mm bore x 70mm stroke] Bulletin #61, 8/5/1975 1952-1968 era 750cc
1969 TRIUMPH Trident T150 750cc 741cc 4-stroke OHV triple [67mm bore x 70mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1970 TRIUMPH T120/RT 750cc 744cc 4-stroke twin [76mm bore x 82mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 TRIUMPH T150V 750cc 741cc 4-stroke triple [67mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 TRIUMPH T140V (aka "short rod") 750cc 744cc 4-stroke twin [76mm bore x 82mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 TRIUMPH TR7 RV Tiger 750cc 744cc 4-stroke OHV twin [76mm bore x 82mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 TRIUMPH TRX-75V 750cc 741cc 4-stroke triple [67mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1979 TRIUMPH T140EUK 750cc 744cc 4-stroke twin [76mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1951 TWN BDG 125cc 122cc 2-stroke AC Split Single [35.5mm bore x 62mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1958 TWN BDGSL 125cc 128cc 2-stroke AC Split Single [35.5mm bore x 65mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1951 VELOCETTE MAC 360cc 349cc 4-stroke OHV single [68mm bore x 96mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1951 VELOCETTE MOV 250cc 248cc 4-stroke OHV single [68mm bore x 68.25mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1951 VELOCETTE MSS 500cc 495cc 4-stroke OHV single [81mm bore x 96mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1953 VELOCETTE MAC 360cc 349cc 4-stroke OHV single [68mm bore x 96mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1954 VELOCETTE MSS 500cc 495cc 4-stroke OHV single [81mm bore x 96mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 VELOCETTE MSS Scrambler 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1962 VELOCETTE VM Endurance 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 VELOCETTE Endro 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 VELOCETTE MSS 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 VELOCETTE Vee 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1964 VELOCETTE Venom Clubman 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1967 VELOCETTE Thruxton 500cc 500cc 4-stroke OHV single [86mm bore x 86mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1950 VINCENT Comet 500cc 499cc 4-stroke OHV single [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 1933-1951 era 750cc
1950 VINCENT Shadow 1000cc 998cc 4-stroke OHV twin [84mm bore x 90mm stroke] Bulletin #61, 5/15/1967 Hot Rod Multis
1967 WHITE Mark I 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1983 WOOD-ROTAX Newport 500 500cc 494cc 4-stroke AC OHC single [89mm bore x 79.4mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 500cc
1984 WOOD-ROTAX Newport 560 560cc 562cc 4-stroke AC OHC single [94mm bore x 81mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1985 WOOD-ROTAX Newport 660 660cc 657cc 4-stroke AC OHC single [101.6mm bore x 81mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 WOOD-ROTAX 600 600cc 599cc 4-stroke AC OHC single [97mm bore x 81mm stroke] n/a 1977-1988 era 750cc
1986 WOOD-ROTAX 614 600cc 611cc 4-stroke AC OHC single [99mm bore x 79.4mm stroke] n/a 1977-1988 era 750cc
1986 WOOD-ROTAX 676 660cc 675cc 4-stroke AC OHC single [103mm bore x 81mm stroke] n/a 1977-1988 era 750cc
1991 WOOD-ROTAX 605 600cc 599cc 4-stroke WC DOHC single [97mm bore x 81mm stroke] n/a 1989-2006 era 1000cc
1959 YAMAHA YA Road Model 125cc 123cc 2-stroke single [52mm bore x 58mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 YAMAHA YDS Road Model 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 YAMAHA YDS Road Model 250cc 246cc 2-stroke AC twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 YAMAHA YDS Road Racer 250cc 246cc 2-stroke AC twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1960 YAMAHA YDS Scrambler 250cc 246cc 2-stroke AC twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1961 YAMAHA TD1 (YDS1) 250cc 246cc 2-stroke AC twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 YAMAHA TD1A (YDS1) 250cc 246cc 2-stroke twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 YAMAHA YG1 Street 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1964 YAMAHA YG1 Trail 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA TD1B (YDS3 / YDS3C) 250cc 246cc 2-stroke twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YA6 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YD3 250cc 246cc 2-stroke twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YG1 Street 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YG1 Trail 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YGS1 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YJ1 80cc 55cc 2-stroke single [42mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1965 YAMAHA YM1 360cc 306cc 2-stroke twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1966 YAMAHA 50U5 50cc 50cc 2-stroke single [40mm bore x 40mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 YAMAHA YA7 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 YAMAHA YJ2 80cc 58cc 2-stroke single [42mm bore x 42mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1966 YAMAHA YL1 100cc 98cc 2-stroke twin [38mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA TD1C (YDS5) 250cc 246cc 2-stroke twin [56mm bore x 50mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA YCS1 250cc 180cc 2-stroke twin [50mm bore x 46mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA YL1E 100cc 98cc 2-stroke twin [38mm bore x 43mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA YL2 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA YL2C 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1967 YAMAHA YM2C 360cc 306cc 2-stroke twin [60mm bore x 54mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1967 YAMAHA YR1 360cc 348cc 2-stroke twin [61mm bore x 59.6mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1968 YAMAHA AS1 125cc 124cc 2-stroke twin [43mm bore x 43mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 YAMAHA CS1 250cc 180cc 2-stroke twin [50mm bore x 46mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 YAMAHA DT1 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 YAMAHA YG5T 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 250cc
1968 YAMAHA YR2 360cc 348cc 2-stroke twin [61mm bore x 59.6mm stroke] Bulletin #61, 5/15/1968 1952-1968 era 750cc
1969 YAMAHA 65-5 80cc 73cc 2-stroke single [47mm bore x 42mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 YAMAHA AS2C 125cc 124cc 2-stroke twin [43mm bore x 43mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 360cc
1969 YAMAHA AT1 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 YAMAHA DT1 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 YAMAHA L5T 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 250cc
1969 YAMAHA R3 360cc 348cc 2-stroke twin [61mm bore x 59.6mm stroke] Bulletin #61, 3/1/1969 1969-1976 era 750cc
1969 YAMAHA TD2 (DS6 / DS6C / YDS6) 250cc 246cc 2-stroke AC twin [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1969 YAMAHA TR2 360cc 348cc 2-stroke twin [61mm bore x 59.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1969 YAMAHA TR2V 360cc 348cc 2-stroke twin [61mm bore x 59.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1970 YAMAHA AT1B 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 YAMAHA CS3C 250cc 196cc 2-stroke twin [52mm bore x 46mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1970 YAMAHA CT1B 175cc 171cc 2-stroke single [66mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 YAMAHA L5TA 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1970 YAMAHA XS650 650cc 654cc 4-stroke twin [75mm bore x 74mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 YAMAHA DT1E 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1971 YAMAHA GXS-1 (XS650 Modified) 750cc 744cc 4-stroke twin [80mm bore x 74mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 YAMAHA R5 360cc 348cc 2-stroke twin [64mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 YAMAHA R5B 360cc 348cc 2-stroke twin [64mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1971 YAMAHA RT1 360cc 352cc 2-stroke single [80mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1971 YAMAHA TD2B (YDS6) 250cc 246cc 2-stroke twin [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1971 YAMAHA TR3 360cc 348cc 2-stroke twin [64mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 YAMAHA AT2 125cc 123cc 2-stroke single [56mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 YAMAHA CT2 175cc 171cc 2-stroke single [66mm bore x 50mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 YAMAHA DT2 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 YAMAHA LS2 100cc 98cc 2-stroke twin [38mm bore x 43mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1972 YAMAHA LT2 100cc 97cc 2-stroke single [52mm bore x 45.6mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 250cc
1972 YAMAHA R5X 360cc 348cc 2-stroke twin [64mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1972 YAMAHA RT2 360cc 352cc 2-stroke single [80mm bore x 70mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1972 YAMAHA TD3 (DS7 / YDS7) 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1972 YAMAHA XS2 650cc 654cc 4-stroke twin [75mm bore x 74mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1973 YAMAHA MX360 360cc 352cc 2-stroke single [80mm bore x 70mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1973 YAMAHA TA125 125cc 124cc 2-stroke twin [43mm bore x 43mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1973 YAMAHA TA250 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 360cc
1973 YAMAHA TZ350 360cc 348cc 2-stroke WC twin [64mm bore x 54mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1974 YAMAHA SC500A 500cc 496cc 2-stroke AC single [95mm bore x 70mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 YAMAHA TX500A 500cc 498cc 4-stroke AC twin [73mm bore x 59.6mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 YAMAHA TX750A 750cc 744cc 4-stroke twin [80mm bore x 74mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1974 YAMAHA TZ250A 250cc 248cc 2-stroke WC twin [54mm bore x 54mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 360cc
1974 YAMAHA TZ750A 750cc 696cc 2-stroke WC 4-cyl [64mm bore x 54mm stroke] Bulletin #61, 9/18/1974 1969-1976 era 750cc
1975 YAMAHA TZ750B 750cc 748cc 2-stroke WC 4-cyl [66.4mm bore x 54mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 750cc
1975 YAMAHA YZ360B 360cc 352cc 2-stroke AC single [80mm bore x 70mm stroke] Bulletin #61, 8/5/1975 1969-1976 era 360cc
1976 YAMAHA XS-DTC (XS650 Modified / OW72) 750cc 744cc 4-stroke AC twin [80mm bore x 74mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1976 YAMAHA TT500C 500cc 499cc 4-stroke AC single [87mm bore x 84mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1976 YAMAHA TZ250C 250cc 248cc 2-stroke WC twin [54mm bore x 54mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 360cc
1976 YAMAHA YZ250C 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 250cc
1976 YAMAHA YZ400C 500cc 397cc 2-stroke single [85mm bore x 70mm stroke] Bulletin #61, 10/31/1977 1969-1976 era 750cc
1977 YAMAHA TZ250D 250cc 248cc 2-stroke twin [54mm bore x 54mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 YAMAHA TZ750D 750cc 748cc 2-stroke 4-cyl [66.4mm bore x 54mm stroke] Bulletin #61, 10/31/1977 Hot Rod Multis
1977 YAMAHA XS750 (1J7) 750cc 747cc 4-stroke triple [68mm bore x 68.6mm stroke] Bulletin #61, 6/20/1978 Hot Rod Multis
1977 YAMAHA YZ250D 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 10/31/1977 1977-1988 era 250cc
1978 YAMAHA YZ250E 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 6/20/1978 1977-1988 era 250cc
1980 YAMAHA IT250G (3R7) 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1980 YAMAHA IT425G (3R8) 500cc 426cc 2-stroke single [85mm bore x 75mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1980 YAMAHA TT250G (3Y0) 250cc 250cc 4-stroke single [75mm bore x 56.5mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1980 YAMAHA YZ250G (3R4) 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1980 YAMAHA YZ465G (3R5) 500cc 465cc 2-stroke single [85mm bore x 82mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1981 YAMAHA XV750 750cc 748cc 4-stroke twin [83mm bore x 69.2mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1981 YAMAHA XV920RH 1000cc 920cc 4-stroke twin [92mm bore x 69.2mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1982 YAMAHA YZ250J 250cc 246cc 2-stroke single [70mm bore x 64mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 250cc
1982 YAMAHA YZ490J 500cc 487cc 2-stroke single [87mm bore x 82mm stroke] Bulletin #61, 6/4/1982 1977-1988 era 750cc
1983 YAMAHA TT600 600cc 595cc 4-stroke single [95mm bore x 84mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1983 YAMAHA XJ750RK 750cc 748cc 4-stroke 4-cyl [65mm bore x 56.4mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1983 YAMAHA XT550K 560cc 558cc 4-stroke single [92mm bore x 84mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1983 YAMAHA YZ250K 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 YAMAHA FZ750 (IAE) 750cc 748cc 4-stroke 4-cyl [68mm bore x 51.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1985 YAMAHA YZ125N 125cc 123cc 2-stroke WC single [56mm bore x 50mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 YAMAHA YZ250N 250cc 247cc 2-stroke single [68mm bore x 68mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1985 YAMAHA YZ490N 500cc 487cc 2-stroke AC single [87mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1986 YAMAHA YZ125S 125cc 123cc 2-stroke WC single [56mm bore x 50mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 YAMAHA YZ250S 250cc 247cc 2-stroke WC single [68mm bore x 68mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1986 YAMAHA YZ490S 500cc 487cc 2-stroke AC single [87mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1987 YAMAHA FZR750RT 750cc 748cc 4-stroke 4-cyl [68mm bore x 51.6mm stroke] Bulletin #61, 6/22/1989 Hot Rod Multis
1987 YAMAHA YZ125T 125cc 123cc 2-stroke WC single [56mm bore x 50mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1987 YAMAHA YZ250T 500cc 487cc 2-stroke AC single [87mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1988 YAMAHA YZ125 125cc 123cc 2-stroke WC single [56mm bore x 50mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 YAMAHA YZ250 250cc 247cc 2-stroke WC single [68mm bore x 68mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 250cc
1988 YAMAHA YZ490 500cc 487cc 2-stroke AC single [87mm bore x 82mm stroke] Bulletin #61, 6/22/1989 1977-1988 era 750cc
1970 YANKEE 500Z 500cc 488cc 2-stroke twin [72mm bore x 60mm stroke] Bulletin #61, 10/2/1973 1969-1976 era 750cc
1954 ZUNDAPP Endro 250cc 198cc 2-stroke single [60mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 ZUNDAPP Challenger 250cc 199cc 2-stroke AC single [64mm bore x 62mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc
1959 ZUNDAPP Citation 500cc 452cc 4-stroke OHC twin [66mm bore x 66mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 750cc
1959 ZUNDAPP Super Sabre 250cc 247cc 2-stroke single [67mm bore x 70mm stroke] Bulletin #61, 5/15/1967 1952-1968 era 250cc


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