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R 75/5 Lower Triple Tree Bearing - Removal

b25bsaboy

b25bsaboy

New member
Good afternoon,

Finished the final strip down of the 1972 BMW R75/5. Now the reconstruction begins, as I haven’t found any really catastrophic Friday afternoon surprise!

The lower triple tree bearing needs to be removed be be cleaned and inspected. Is there any way of doing this without destroying the whole assembly?
 
Approaches that come to mind:

- special puller...I think Cycleworks has one
- spot weld on the lower race...supposedly just falls off at that point
- Dremel into the race part way, then split with cold chisel. Kind of destructive and prone to possible mistakes.
 
I have and use the Cylce Works Puller. It's not without it's challenges and a bit of a learning curve as the instructions have been photo copied way too many times and are for a previous version of the tool but it does work!

I cannot recall if the /5 has the protective thin metal cup under the lower bearing but probably does. This will get destroyed and you need a new one no matter if using new or re installing the used bearings. Personally if I go to the trouble of pulling the old ones out I just replace them. This is rewarded by improved handling most of the time!
 
happy wanderer said:
I have and use the Cylce Works Puller. It's not without it's challenges and a bit of a learning curve as the instructions have been photo copied way too many times and are for a previous version of the tool but it does work!

I cannot recall if the /5 has the protective thin metal cup under the lower bearing but probably does. This will get destroyed and you need a new one no matter if using new or re installing the used bearings. Personally if I go to the trouble of pulling the old ones out I just replace them. This is rewarded by improved handling most of the time!
Click to expand...

After further inspecting I agree in that both bearings will be replaced.

Agree with Kurt, in that When I had to take the bearing races out of the Triumph or Norton Engines, used to run a bead (electrode) at a 45 degree angle, wait ten minutes and the race 9 times out of 10 fell out.
 
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