Drive shaft bearings - removing / replacing

Thanks to Scooter Works (my friend's classic scooter repair shop) in London, I learned the trick to removing and replacing the bearing outer rings.

Because the outer metal casing is cast and the bearings and rings are hardened steel, the outer metal casing heat up quicker than the bearing ring.

Heat up the casing with a torch. When it is hot enough, you can just pull out the ring.

Replacing the rings is even easier. Heat up the housing, freeze the bearing ring, and it will just drop in.

The bearing must be completely greased up before dropping it back in.

Here are the bearings and rings.

Heat up the casing.

Freeze the bearing ring.

They just drop in without any effort.