SSP-G 47mm Big Bore Cylinder Kit for 50cc 4-Stroke Yamaha ScootersSPECIFICATIONS: Upgrades to 75.6cc DisplacementBore: 47mmOverall Height (cylinder): 71.5mmPiston Pin Outer Diameter: 10mmOverall Piston Height: 30mmPiston Compression Height: 16mmIncludes Extra Head Gasket3 Valve HeadIntake Valve Diameter: 15.5mmExhaust Valve Diameter: 16.5mmUsed on Fuel Injection SetupCOMPATIBILITY: C3 Giggle 50 4TVino 50 4TZuma 50F 4TSSP-G 47mm Big Bore Cylinder and Head Kit for the Yamaha Zuma 50F 4 Stroke Liquid Cooled Scooter and many other makes and models including the Vino Classic 50cc (4 stroke model). Upgrades to 75.6cc displacement!Includes cylinder, 3-Valve cylinder head, head gaskets, base gasket, piston, piston pin, piston rings and cir clips.**NOTE: A FUEL PRESSURE REGULATOR OR FUEL INJECTION TUNER MUST BE USED WITH THIS CYLINDER KIT****