Vespa V90 Prim ET3 PK 80-125 S/XL POLINI Evolution Full Circle Reed Crankshaft 52.8mm Stroke Ø20mm

Vespa V90 Prim ET3 PK 80-125 S/XL POLINI Evolution Full Circle Reed Crankshaft 52.8mm Stroke Ø20mm

This full circle crankshaft is specifically designed for the Italian racing regulations. Thanks to 52.8 mm stroke, 57 mm bore and 134.73 cc's are achieved, putting this under the magical 135 cc limit. Eye candy combined with high quality workmanship. The connecting rod is specially reinforced, making it incredibly durable and distortion resistant, seen up till now only in the go cart arena. Connecting rod length is pumped up to 102 mm instead of the original 97 mm, allowing exact pre-compression, higher fill and more power in all ranges. The full circle crankshafts are outfitted with heavy metal insets and are finely balanced. Further balancing bores have been closed with insets for an optimal flow. Smooth and quiet motor is guaranteed up to the highest ranges. Crankshaft casing must be modified, ideally, milled out to fit.

 For fitting this crank requires crank housing in crankcase to be rebored.