Cylinder Polini Evolution 150cc Vespa Primavera / PK / FL 125cc 2T stroke 54mm

From Polini, tested in the legendary 500km race of Pomposa, they present to us the new Evolution Ø60 cylinder in 54 stroke.

Its installation requires a series of modifications to the crankcase, such as widening the skirt, trimming the upper circle of the crankcase on the flywheel side, and leveling the base.

We recommend assembling it with its specific crankshaft and exhaust.

Assembly instructions.