Polini 49mm (78.7cc) Cast Iron Sport Cylinder Kit for Piaggio 4-Stroke 2-Valve Engine Powered Scooters. Kit includes cylinder, piston, rings, piston pin, cir clips, dowel pins, and gaskets.
When you use this Polini 49mm Big Bore Kit in conjunction with your stock crankshaft you will increase your total displacement to 78.7cc! The manufacturer claims 6.5bhp at 7,500RPM is possible with this kit.
Fits the following models with Piaggio's air cooled 2 valve engines: