8.1 / R-18 crankshaft C39,3 B90 Ø76 (for 70cc) for 8.1 Fireblade and Polini crankcase

In high resistance steel and great inertia with tungsten inserts, connecting rod forged in special steel. Stroke: 39.3mm Connecting rod: 90mm Outside diameter: 76mm Width: 46mm Pin axle-connecting rod: 18mm Weight: 1750gr c.a. Balance 50% It mounts bearings with an internal diameter of 25mm Products intended exclusively for competitions, forbidden to use on the road. We decline any responsibility for improper use. Made in Italy product.