Minarelli AM6 Polini Race Crankshaft GB593 42mm ID on the clamp

42mm ID on the clamp

needle bearing

These are new old stock but do have some minor surface rust from age

and A55 engines

Sachs 505/2D engine

Minarelli AM6 Polini Race Crankshaft GB593 42mm ID on the clampRacing crankshaft from Polini for the Minarelli AM6 series of engines. This is a standard stroke crankshaft so perfect for 50cc to 80cc engines that require the stock stroke. Perfect for rebuilding your Aprilia RS50 or Rieju RR and more. From Polini: Polini Motori dedicates all its experience to the Enduro and Motard 50cc motorcycles by developing the brand new Polini For Race crankshaft. It has been designed for Minarelli AM6 engines with the aim to