Cylinder Polini Evolution 130cc Vespa Primavera 125 2T

Polini Evolution kit Cylinder made of aluminium with Nickel-Silicon alloy that improves piston sliding, wear resistance, and abrasion resistance.
Cylinder with 57mm diameter, 51mm stroke. 130cc.

Racing distribution; equipped with six transfer ports, gravity-cast piston in lightweight alloy with two special S10 chromed cast iron rings.

The piston is coated with a special layer of molybdenum disulfide that improves sliding during the running-in phase.

The cylinder head improves heat dissipation thanks to the fins that are also below the cylinder head plane and features a copper gasket that eliminates leaks between the Cylinder and the cylinder head.

Vespa Primavera, PK, PKXL.