Crankshaft -POLINI Racing (rotary slider) 57mm stroke- Vespa PX125, PX150, Cosa 125

Polini Racing crankshaft 57 mm for Vespa PX125 and PX150

• Flow-optimized cheek piece
• well balanced
• Stable connecting rod
• Extended intake angle
• Available with 57 mm (std) and 60 mm stroke
• Stroke journal: 20 mm (exception PX200, 57 mm stroke: 22 mm)

The width of the sealing surface on the rotary valve cheek is 15.8 mm, as on the original PX125/150 shaft. The PX200 version has a width of 16.8 mm. The extended intake control angle results in a larger timing cross-section and thus enables a significant increase in power across the entire rev range.

Very nice stable shaft that provides more bandwidth in every engine

(US).