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THIS PISTON MUST BE USED WITH A HEAD FROM THE FOLLOWING 

XR70_ALL_YEARS *** CT70_82_TO_94 *** C70_PASSPORTS

THIS WILL ONLY WORK IN OUR 51MM BIG CYLINDER

STOCK HONDA CYLINDERS CAN NOT BE BORED OUT THIS BIG!!!!

WORKS WITH STOCK CRANKS OF (ALL_XR70_CRF70) (CT70_82_TO_94) (PASSPORTS_82_83) (CLONES_W/47MM_BORE)

@ 51MM_PISTON_KIT (NEW_70_HEAD) (LONG_ROD) (SHORT_CYLINDER) 1/22M (100037) (S1421) 100037 (S1421)