@ e ALLOY 51MM BIG BORE 85CC KIT XR50 CRF50 1982 TO 1999 Z50R<p>THICKER BOTTOM SKIRT MORE DEPENDABLE THAN ANY 88CC KIT

THIS WORKS TO CONVERT A 50CC TO A 85CC DISPLACEMENT ON THE FOLLOWING HONDA MODELS.

ALL XR50'S

ALL CRF50'S

Z50R 1982 THRU 1999

YOU MUST USE A STOCK XR50/CRF50 HEAD AND CRANK WITH THIS KIT

A BIGGER MAIN JET PROBABLY NEEDED,, IF YOU KEEP THE STOCK CARB ??