Polini Cylinder Kit "Evolution" 50cc aluminium piston pin=12mm Yamaha Neo's / Ovetto

A great favourite on the race tracks for years: Polini 50cc Aluminium Cylinder Kit "Evolution" MBK Ovetto / Neo's, 12mm (Minarelli horizontal AC, 12mm pin).

The kit includes:

• Aluminium Cylinder, d = 40.2mm, with 5 transfer ports and bridged exhaust port
• Single-Ring Piston, 12mm pin
• High-Compression Aluminium Cylinder Head
• Carbon Fiber Reed Petals (2x), 0.35mm
• Gasket Kit for mounting

This street-legal cylinder kit is definitely one of the most powerful 50cc kits on the market. Originally developed for the race track, it can just as well be used on the road.

We recommend combining it with a 17.5mm carburetor (minimum), a reinforced crankshaft and a sports or racing exhaust; moreover, regular maintenance is essential if you want to use it as an everyday cylinder (regular replacement of piston ring/piston).