gear cover / transmission cover Polini Evolution for Piaggio 12mm P.23258

Polini reinforced transmission cover, ideal for tuning above 70cc. The standard cover allows the gearshaft to sit in a recess and is only lubricated by the gearbox oil. This item has a ball bearing and needle bearing set up and massively reduces the amount of friction. The following bearings are fitted to the transmission cover: 6201 C3 (12x32x10) 6203 C4 (17x40x12) NK24/16 (24x32x16) Suitable for Piaggio engines with 12mm gear shafts.