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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) 7/18M (100037) 100037$41.95