THIS WILL FIT ON ALL K0 THRU 82 CT70S ALL Z50'S AND PASSPORTS. THIS IS THE ONE ON THE CAMSHAFT. R2031 @ *CAM SPROCKET SPECIAL BOLT SOLD_EACH 90083-035-010 7/21M (R2103) THESE BOLTS ARE SOLD EACH AND THERE ARE THREE PER 50cc AND 70cc. THEY HOLD THE CAM TIMING SPROCKET TO THE CAM SHAFT. R2103 NO LONGER AVAILABLE FROM DRATV @ NEW TAKEOFF AFTERMARKET CAM_SPROCKET 28_TOOTH ALL_CT70_TO_1982 ALL_ATC70'S ALL_Z50_TO_87 ALL_SL_XL_CL70'S (255K) temp out of stockTHESE WERE ON SOME CAMS IN HEADS THAT WE DISASSEMBLED SO THEY ARE BRAND NEW JUST HAVE MARKS WHERE THE BOLTS WERE TIGHTENED UP ONCE 255K