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:
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
![[M10 x 1.25] flange nut Polini](https://www.racing-planet.co.uk/images/gross/323.0010_2_shop.jpg?language=en&shop_ID=1 "[M10 x 1.25] flange nut Polini"){kind=small}
