Derbi D50B Polini Race Crankshaft 39mm This is the original Derbi

This is the original Derbi Metrakit Big Muff exhaust

and hose fittings

original ZADI fork locks

there is no starter clutch

Derbi D50B Polini Race Crankshaft 39mm This is the original DerbiRace crankshaft from Polini for the late model D50B Derbi engines. This is for 2006 or newer model engines found in the Derbi GPR Senda, Aprilia RS50 RX50, 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 Piaggio, Derbi engines (D50B from 2006) with the aim to improve the quality and the performance of the