crankshaft Polini Evolution Reed Mission 105mm conrod, 54mm stroke for Vespa Primavera, ET3, Smallframe

This Polini Evolution full circle crankshaft can only be used together with the Reed Mission cylinder part no. 140.0227!

The full circle design drastically reduces turbulence in the crankcase and increases the pre-compression of the gas-air mixture. This high-end crankshaft has been precision balanced with tungsten and aluminium inserts. To install this crankshaft, the crankcase must be drilled. This Polini Evolution full circle crankshaft increases the stroke to 54mm. The connecting rod is milled from a block and measures 105mm centre distance. The matching needle bearing is included here in delivery.

Technical data:

• full circle crankshaft
• tungsten and aluminium inserts
• precisely fine balanced
• conrod: 105mm
• stroke: 54mm