As part of my Malossi kit install I needed to sort out the rear hub bearings. This job is pretty straight forward with the right tools. The things that I have are a blind bearing extractor which is a slide hammer that can be attached to expanding tips for the various shaft sizes, a set of circlip pliers. The other tool required is a heat gun. Once you have removed the rear wheel, brake shoes, transmission cover, clutch, and drained the hub oil, you are then looking at the gear set. The gears simply lift away and you have the circlips and bearings to remove. To get the bearings out I used the heat gun to heat the general area on a high setting for 3 - 4 minutes then attached the bearing puller. Three or four quick solid hits with the slide hammer saw the bearings extracted. There are three bearings that can be drifted out as they are not blind. The heat gun works because the expansion of aluminum is much greater than the steel bearings.

The bearing sizes are as follows. (Sizes in mm. Shaft x diameter x width) 15x42x13 You need 3 of these.
20x47x14 Sealed one side 1 required (get sealed and pick one seal out)
25x52x15 bearing wheel Sealed
15x35x11 bearing clutch Sealed. Fits in transmission cover

Two seals are needed
20x32x7 Primary shaft
35x47x7 Wheel

These can be obtained from any generic bearing and seal merchants. Be sure to ask for good quality bearings. They will still be half or less the price of the genuine parts.

So I am at the point now of sourcing the parts. I plan to fit the bearings after a night in the freezer and again use the heat gun on the aluminum casing.