THIS KIT HAS EXTRA PARTS YOU WON'T USE,, THIS WAY IT WILL WORK FOR DIFFERENT MODELS. FYI STOCK 50'S = 39MM ALL Z50A Z50R XR50 CRF50 = 39MM ALL XR70 CRF70 = 47MM CT70 ALL = 47MM ATC70 ALL = 47MM C70 PASSPORTS ALL = 47MM C70M'S ALL = 47MM 85CC KITS = 51MM 88CC KITS = 52MM TRX90 = 47MM TRX90 103CC = 51 TRX90 106CC = 52 THIS WILL WORK FOR ALL YEARS OF 50'S 70'S AND TRX90'S PICK_BORE_SIZE SEE DROP BOX BY ORDER BUTTON 39MM_ 200008 47MM_ 200009 51MM_ 200010 52MM_ 200011 TOP END GASKETS ** PICK BORE SIZE ** 39 47 51 52 MM temp 200008 / 200009 / 200010 / 200011$13.99PICK_BORE_SIZE: 47MM_20000951MM_200010 COMPLETE GASKET_SET_FIT'S ALL_50'S_70'S OR_TRX90'S SEMI_AUTO_CLUTCH 52/54MM_88/95CC (MANUAL_CLUTCH_READ) (1004D)THIS WOULD WORK ON HAND CLUTCH MODELS TOO, BUT IT IS MISSING THE CLOVER LEAF GASKET AND ROUND ADJ PLATE COVER GASKET AS SEEN BELOW ON THIS PAGE.. 1004D$16.95