Athena 47.6mm A/C Minarelli Performance Cylinder Kit

Athena 47.6mm Air Cooled Horizontal Minarelli/Yamaha Jog 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 Yamaha Zuma 2 Stroke from years 2002-2011 and Jog CY50 from 1992-2001.Please see our Warranty & Returns Policy. *You may need to modify your engine case to accommodate the larger cylinder. Upgrades to 70cc Aluminum Construction with Nickel Carbide Plated Bore Cylinder Bore: 47.6mm Cylinder Sleeve Outer Diameter: 50.5mm  Wrist Pin Diameter: 10mm Total Piston Height: 47.5mm Compression Height (from center of wrist pin hole to top edge of piston): 26mm Includes Carbon Fiber Reeds