crankshaft Polini Big Evolution 85mm / 12mm for Minarelli horizontal LC

Polini Racing crankshaft for the 70 and 84cc Big Evolution cylinder kits with 12mm piston pin for scooters with water-cooled Minarelli horizontal engine. The crankshaft has a 16mm thick crankshaft stub, so that a larger Variohülse must be used, or better yet a corresponding Racing-Variomatik should be installed.

Who wants to use the crankshaft for a sport or racing cylinder, requires the optionally available adapter (170.1001), so that the piston does not hit the head.

Technical data:

.
• Conrod: 85mm
• Stroke: 39.2mm
• Crankshaft stub: 16mm
• Piston pin: 12mm