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Thread: R 75/5 Lower Triple Tree Bearing - Removal

  1. #1
    Registered User b25bsaboy's Avatar
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    R 75/5 Lower Triple Tree Bearing - Removal

    Good afternoon,

    Finished the final strip down of the 1972 BMW R75/5. Now the reconstruction begins, as I havenít 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?
    Rick MacPherson
    Success is Not a Destination, But a Journey.
    Accredited Motorcycle Appraiser
    1968 BSA Starfire, 73 R75/5 SWB, 2008 Honda GL-1800 Lehman Trike

  2. #2
    Liaison 20774's Avatar
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    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.
    Kurt -- Forum Liaison ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  3. #3
    Day Dreaming ... happy wanderer's Avatar
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    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!
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  4. #4
    Registered User b25bsaboy's Avatar
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    Quote Originally Posted by happy wanderer View Post
    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!
    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.
    Rick MacPherson
    Success is Not a Destination, But a Journey.
    Accredited Motorcycle Appraiser
    1968 BSA Starfire, 73 R75/5 SWB, 2008 Honda GL-1800 Lehman Trike

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