PINION (22T) GROVE ON BACK SIDE FOR SLIDER SPRING WIRE. fits: Honda C70K1 1972 Honda C70M 1971 Honda CT70 1970, 1976, 1977, 1978, 1979 Honda CT70K1 1972 Honda CT70K2 1973 Honda CT70K3 1974 Honda CT70K4 1975 Honda Z50A 1969, 1976, 1977, 1978 Honda Z50AK1 1970 Honda Z50AK2 1971 Honda Z50AK3 1972 Honda Z50AK4 1973 Honda Z50AK5 1974 Honda Z50AK6 1975 Honda Z50R 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1987, 1988, 1989, 1991, 1992, 1993 Honda Z50RD 1986 Honda ZB50 1988 @ *PINION GEAR 22T STARTER DRIVE (50'S_TO_92) (70'S_TO_1978) (3_SPEED'S_ONLY) 28211-040-035 1/21M (R2245) R2245 @ *FRICTION SPRING FOR KICK START PINION GEAR 28223-035-010 28223-035-035 1/20M (R2124)(Z50'S TO "92") AND (CT70'S TO "78")ALL (SL CL XL 70'S) THIS FITS ALL THE HONDA HORIZONAL 70CC HAND CLUTCH MODELS ALSO FITS 3 SPEED AUTO CLUTCH 50'S_TO_1992 AND 70'S_TO_1978 R2124