complete primary transmission kit BIDALOT FACTORY RACING for DERBI Euro 3 engine

Ideal to increase performance or start fresh, this is the primary transmission kit BIDALOT RACING FACTORY single unit for DERBI euro 3 engine (DERBI SM, ENDURO, GPR, Aprilia RS DERBI, GILERA and other 50cc).



A perfect set to replace the original parts or accompanied by small & medium engine configuration (50cc, 70cc ...). BIDALOT amended the primary transmission ratio going from 21/78 to 21/64, all in order to rotate the main shaft faster and thus reduce the torque to move in the clutch.



With all this, pieces like the bell / clutch nuts ... are specially billet aluminum for maximum lightness and strength. A very reliable set or you can now install clutch discs 6 instead of 4 as the origin.



Moreover, with this transmission and clutch, ends skate! This concentration of technology BIDALOT & performances will give you all the engine power of your mécaboite crankshaft output and directly to the wheel! Clearly, any loss of power, on the contrary you will recover.



Complete with primary transmission sprocket 21 teeth driving balancer shaft pinion, water pump pinion, primary gear wheel 64 teeth mounted on needle bearing, spacer, two needle bearings, a clutch bell & CNC machined clutch nut billet aluminum, game 6 friction plates with 5 steel plates in steel, 5 racing clutch springs, screws ...

Installation and explanation from home BIDALOT in downloadable product.



This pack consists of:

- 1 primary transmission sprocket teeth Z = 21 + balance shaft drive sprocket
- 1 water pump gear
- 1 primary drive wheel Z = 64 teeth mounted on needle bearing
- 1 spacer
- 2 cages needle
- 1 bell blue anodized CNC clutch
- 1 clutch nut blue anodized CNC
- 1 set of clutch discs 6 + 5 trimmed smooth steel discs
- 5 Racing clutch springs
- 1 + washer screws game