Athena 47.6mm Air Cooled Vertical Minarelli/Yamaha Zuma Big Bore Cylinder and Head Kit. Kit includes cylinder, cylinder head, piston, ring, piston pin, cir clips, head gasket, base gasket, exhaust gasket and carbon fiber reeds.When you use this Athena 47.6mm Big Bore Kit you will increase your total displacement to 70cc!
Fits "Pre-Bug Eye" Zuma (1989-1990, 1997-2001)
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*You may need to modify your engine case to accommodate the larger cylinder.