THIS IS THE SHAFT THAT THE KICK START PEDAL BOLTS TO. IT IS A MAJOR PROCESS TO REPLACE, BUT ITS WORTH IT. THIS FITS 3 SPEEDS AND HAND CLUTCH FOUR SPEEDS 50 AND 70'S THRU 1978!!!! ACCUALLY ON THE Z50'S THIS WILL WORK THRU 1992.. 9B @ *PINION GEAR 22T STARTER DRIVE (50'S_TO_92) (70'S_TO_1978) (3_SPEED'S_ONLY) 28211-040-035 1/21M (R2245) R2245 @ **KICK_START PINION_24T CT70H_HK1 CL70_SL70_EARLY OEM_NUMBER 28211_065_005 1/21M (211B) 211B @ *FRICTION SPRING FOR KICK START PINION GEAR 28223-035-010 28223-035-035 1/20M (R2124) R2124 @ *KICK_SPRING "RETAINER" MOST 50'S AND 70'S CLICK TO SEE LIST 1/19M (208Z) 208Z @ *KICKSHAFT RETURN SPRING OLDER 50'S/70'S 28281-035-003 1/22M (209A) 209A @ *KICKSTART SHAFT THRUST WASHER 17MM 1/18M (209B) 209B @ *20MM KICK SHAFT SET-RING 1/19A (209C) 209C @ *17mm_CIRCLIP KICKSHAFT_SHAFT PRIMARY_GEAR SHAFT_50'S/70'S 90601-001-000 1/20A (R2232) R2232 @ *16MM_SNAP_RING FITS_KICKSHAFT 50/70'S OLDER BIKES 94510-16000 1/22A (209D) 209D @ *20MM FLAT WASHER THRUST KICK SHAFT 90482-035-025 1/22M (216K) 216K