Early Brose C, T, TF motors had no seal covering the right hand crankshaft bearing. This seal is extremely effective at stopping water and dirt entering the bearing and ultimately the motor.

This is also a direct replacement if your Brose S or S-Mag seal is missing, worn or damaged. (For 1.2, 1.3, 2.1 and 2.2 motors)

Once the seal has been fitted over the sprocket carrier it will be pushed down when the chainring spider is re-fitted.

This gasket will fit Brose S-Mag 2.1 & 2.2 and fits between the motor and the drive belt cover.

This is one of the two circlips visible on either side of the crankshaft. They are 19.5mm internal diameter and 2mm thick, fitted to the Bosch Gen 2 motor.

Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)

Bosch green “tacky” seal grease and bearing cover for the right hand crankshaft bearing on early Gen 3 motors: Active Line, Active Line Plus and Performance Line motors. Suitable for all BDU3XX drive units up to serial number 859302XXX

Bosch green “tacky” seal grease and bearing cover for the right hand crankshaft bearing on early Gen 3 motors: Active Line, Active Line Plus and Performance Line motors. Suitable for all BDU3XX drive units from serial number 860011XX

BEARING PROTECTION RING SERVICE KIT FOR Gen 4 (BDU4XX) MOTORS

This is a durable double lip seal, specifically manufactured to fit the Bosch crankshaft. An effective waterproof barrier for the Bosch right-hand crankshaft bearing.
If fitted with the MudStop bearing seal it makes a formidable barrier against water, mud or dust entering into the bearings of your expensive motor. Click here for instructions: 

With seal and MudStop fitted below.

Bosch Generation 2 motor BDU2xx below (NOTE: Small chainring)

This gasket will fit Brose C, S , T and TF

This gasket will fit Brose S-Mag 2.1 & 2.2 and fits between the motor and the ECU

MOLYKOTE PG-75  High quality, German manufactured grease. Specifically designed for plastic and metal gears, as found in many ebike motors.

MOLYKOTE PG-75 Is normally only available in 1000ml tins (enough to do over 60 motors!) We now supply handy 30ml containers. These should give enough grease for at least 2 motors.

MudStop sealing system was designed by VeloLab to ensure better protection for the vulnerable main motor bearing on the Bosch Active and Performance Line / CX motors.

Unlike the Bosch protection seal, MudStop completely covers the entire main motor bearing and outer casing. This stops water and contamination getting past the cover and entering the bearing.

When used with the custom made crankshaft seal, it makes your motor as protected as it always should have been

Full information and instructions can be found here: 

Yamaha drive unit grease

This pot contains 50ml of genuine Yamaha MULTEMP AC-N® motor grease. This should be enough grease for two to three full motor overhauls. MULTEMP AC-N® is a relatively expensive grease that is generally only available in large quantities. We have decanted this grease to help save money and waste.

Bosch bearing protection seal (see also “MudStop”)

Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)

This is the damping gasket film that sits between the motor and the frame on a Bosch Gen 2 motor to stop squeaking and creaking.

Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)

New Bosch long life tacky grease for the main motor bearing seal.

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