Crankshaft Polini Minarelli vertical The updated Polini For Race crankshaft is designed for everyday use and for scooters with faster set-up Although the Polini For Race crankshafts do not have full cheeks, they are very stable and perfectly balanced to reduce both vibration and power losses This Polini For Race crankshaft is recommended for both original and high spin setups When ordering a new crankshaft, don't forget to order the new crankshaft bearings and seals