Bosch drive unit grease for gears and bearings within the motor. This grease should be used for overhauls or re-greasing Bosch Performance Line motors.

These O-rings sit below the crankshaft bearings to prevent water ingress under the bearing itself.

Fits behind the sprocket nut of the Bosch Gen 2 motor.

Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)