This bearing race will fit Brose C, T, TF, S & S-Mag 2.1 & 2.2.

The large drive belt pulley contains a one way sprag clutch bearing and its race. This can become worn or damaged by rust, bearing failure etc. It can also be damaged while trying to remove the bearing itself.

The sprag clutch bearing MUST have a smooth, clean surface and the correct grease or the bearing will fail.

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.

These high density, sticky backed foam pads are fitted to the Bosch Gen 2 motor to cushion between the motor and frame this can stop the motor creaking as it flexes against the frame mount.

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

This kit contains a stainless steel shield washer and a thinner 1.5mm circlip to replace the original 2mm clip.

The left hand crankshaft bearing should be covered with Bosch Long Life “Tacky” Grease then the shield washer placed over the outer bearing seal. The grease should be checked from time to time, depending on your riding terrain, bike cleaning habits, weather conditions etc.

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

If you are overhauling any Bosch Gen 2 motor, this kit contains every circlip used in the motor. These should be replaced to ensure good clip integrity.

Generation 2 motor BDU2xx (NOTE: Small chainring shown below).

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 Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing left hand side.

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing right hand side.

Bosch Generation 3 motor BDU3xx (NOTE: Large 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

Small O-ring to fit the left hand side of the Bosch Gen 3 crankshaft.

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Freewheel clutch bearing, fits into the large drive gear.

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Bosch Gen 3 left hand crankshaft bearing fits in the left hand motor cover and supports the crankshaft.

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Kit to replace all the bearings in the Bosch Gen 3 motor. This kit will fit the Active Line, Active Line Plus and Performance Line motor (There is no Gen 3 Performance Line CX)

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

Bosch Gen 3 Right hand crankshaft bearing fits in the right hand motor cover and supports the sprocket carrier and crankshaft.

Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)

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