All - I have a '95 monster and am looking at swaping a hollow axle rear to it - before I get into somthing I regret is this just a simple bearing swap or do I need to machine the wheel/Carrier to make it fit? Does anyone know?
If you want to go from a 17mm rear axle (or is it a 20mm?) to a hollow 25mm rear axle, you'll need:
1) Rear swingarm (the holes in the stock swingarm for the stock axle is too small)
2) Chain adjuster blocks
3) New wheel bearings and spacer for a 25mm axle
4) Rear brake caliper bracket
5) spacer that goes between the sprocket carrier and swingarm
6) bearings for the sprocket carrier
7) and......that's all I can think of off the top of my head
Another issue you may have is that a swingarm for a 25mm axle probably won't bolt up to the earlier (851 style) rear suspesnion, so you'll need to get the swingarm modified or the fram modified for the newer rear suspension.
Now that I have you frustrated, you can probably machine the slots in the stock swingarm for the 25mm axle. Also, you may be able to drill out the chain adjuster blocks and the rear brake caliper bracket. I'd just buy a new sprocket carrier/swingarm spacer and all the necessary bearings and wheel hub spacers.
Edit - Not knowing the thickness and OD of the bearings necessary, there may be a possibility that the hub will need to be machined 1-2mm in diameter for new bearings. I believe that an early 90s SS900 fornt wheel would need to be machined down for the 17mm front axle of a Ducati Paso, so depending on the year of wheel and the dimensions, there may not be a bearing availble with the dimensions that you will need.
