Cylinder Polini Big Evolution 130cc Vespa Primavera 125 2T stroke 52mm

Competition cylinder kit designed for the Italian championship, nicasil-coated aluminum cylinder with direct intake that houses a large 0.4mm carbon reed valve with 6 petals, cylinder head with additional cooling fins, 57mm bore, 52.8mm stroke.

It is installed with the 210.0034 crankshaft and 102mm connecting rod (specially designed for this cylinder), 280.0031 bearings and 285.0111 seals; achieving a displacement of 135cc, 6 transfer ports and bridged exhaust port, piston coated with a layer of molybdenum disulfide with a 1.5mm chrome ring, compression ratio of 13.5:1. The kit includes the reed valve, the intake manifold, and mounting accessories.

The Polini Evolution 2 P200.0291 exhaust is recommended.