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Thread: F/D pivot pin threads thread

  1. #1
    Aspiring Profligate Jeff488's Avatar
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    F/D pivot pin threads thread

    In the process of transmission work(by Anton) on a friend's 2000 RT and when the inner pivot pin was removed, I found this:



    I have seen quite a few buggered up threads, but never done quite so nicely as these.
    The threads in the nut were unharmed! Tough nut.

    I would be interesting to talk to the guy who last installed the pin. Or maybe not.
    Last edited by Jeff488; 01-03-2015 at 01:30 AM. Reason: Clarity
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  2. #2
    Quote Originally Posted by jeff488 View Post
    In the process of transmission work(by Anton) on a friend's 2000 RT and when the inner pivot pin was removed, I found this:



    I have seen quite a few buggered up threads, but never done quite so nicely as these.
    The threads in the nut were unharmed! Tough nut.

    I would be interesting to talk to the guy who last installed the pin. Or maybe not.
    So, is that spiral metal off of the pin or out of the swingarm casting or transmission case casting??
    Paul Glaves - "Big Bend", Texas U.S.A
    "The greatest challenge to any thinker is stating the problem in a way that will allow a solution." - Bertrand Russell
    http://web.bigbend.net/~glaves/

  3. #3
    Pepperfool GSAddict's Avatar
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    Looks to me off the end of the pivot pin.
    Click on the picture for more detail
    '
    Ufda happens..........

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  4. #4
    Registered User detbmw's Avatar
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    Quote Originally Posted by GSAddict View Post
    Looks to me off the end of the pivot pin.
    Click on the picture for more detail
    It's my RT, the spiral is the end of the threads of the pivot pin. Like maybe the nut was mis-threaded then torqued down? The threads are stripped clean off of the pivot pin for a couple turns.

    I've had the bike for 3 & 1/2 years, 37K. We replaced the clutch a year ago, but pulled the transmission back to the FD off as one piece. This is the first time we have removed this nut. The bike had two owners before me so I don't know when this happened, but the bike has been ridden for many thousands of miles like this.
    Rich
    2001 R1150GS, 1988 K75S
    East Texas BMW+ Motorcycle Club
    Texas National Picnic, Jacksonville TX, 3rd Saturday in April

  5. #5
    Aspiring Profligate Jeff488's Avatar
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    What Rich said.

    The bike has about 150,000 miles on it now.
    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

  6. #6
    Aspiring Profligate Jeff488's Avatar
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    Update

    We have gotten the tranny back and installed. Anton sent the bad parts back with it.
    Very interesting, as Arte Johnson would say.

    The gear moved in to the bearing, ripping out the seal and milling a groove in both races, the cage, and the ends of the teeth.
    Click on the images for a larger one.



    '08 BMW R1200RT
    '08 Suzuki DL650 "Screaming Yellow Zonker"
    Looking for Ed Sanders' Truck Stop.

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