Polini Big Bore Kit; 4T Vespa Primavera, LX 50, Fly 50 & P50 rainfly Exhaust Port: 22mm

Exhaust Port: 22mm

We recommend careful tuning

be very cautious

Kit Includes

and more efficiently

Polini Big Bore Kit; 4T Vespa Primavera, LX 50, Fly 50 & P50 rainfly Exhaust Port: 22mmPolini big bore kit for four valve, 4T, 49cc Piaggio engines including modern Vespa LX 50, Primavera 50, Fly 50, and the P50 Scootcoupe vehicles. This kit increases the displacement to 78. 8cc! Specifications: Aluminum alloy cylinder Displacement increase: 78. 8cc Compression ratio: 11. 6: 1 Gear up ratio: 14: 43, 60% increase over stock 11: 54 Includes everything in the photo Compatibility: Vespa LX 50 (2006 2009) 4 Stroke 2 Valve Vespa LX 50 (2010