F800GS One wheel in the grave?

Discussion in 'Parallel Universe' started by Cyrotronix, Jul 16, 2020.

  1. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    Having some time to tinker with this unhappy motorcycle I put it on the center stand and let it run. Had it idle for 15 minutes. No problems, no unusual noises. Brought it operating temperature and checked oil. Levels are good. Now I'm letting it idle for another 15 minutes with the bike in gear. 12 minutes in and no problems. One thing I am noticing is the temp gauge for the engine reads normal but my ambient temperature is hot hot. 136 F. Is that just because the sensor is near the radiator?

    IMG_20200718_162722771.jpg


    Update: The ambient temp deal was definitely because it was sitting idle. I rode the bike around my yard and that temp dropped. Also still operated problem free.

    There's no way this was just a fluke, is there?
    #21
  2. B_C_Ries

    B_C_Ries Long timer

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    You may have had or still have air in the coolant system, air in the wrong place can prevent the coolant from moving and the engine can lock up from the resulting overheating. Temp going excessively high at idle and cooling down quickly once you speed up the engine is often an indication of a low coolant level.
    #22
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  3. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    I called my local BWM Dealership today.
    Parts Manager has been there since before the F650/700/800GS series was introduced and owns an early vintage F800GS
    he looked it up today and FWIW his dealership has never /ordered/installed/sold a set of those drive gears....
    so ........mmmmmmmmmmmmmm WTF?
    #23
  4. The Maz

    The Maz Clueless and lost

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    Same as the service manager at my dealership said there isn't a problem with the early charging systems.
    #24
  5. heatmizr

    heatmizr n00b-tastic

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    Wait, we're mixing oil flow and coolant issues here...
    Are those gears that stripped bathed in oil? A piece(or more) could have blocked an oil passage, causing earlier over heating. It could have fallen away since, running fine now.
    Did you change the oil? Did any plastic come out? Maybe it's stuck in an area where it can't flow to the pan to drain.
    #25
  6. The Maz

    The Maz Clueless and lost

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    All the plastic on mine went straight into the sump. There is the screen on the lower intake then the oil filter before the oil goes into any passages.
    #26
  7. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    I'll be doing another oil change today to inspect. Right now I've just been letting it sit until I get the adapter I need to check oil pressure. Those gears are bathed in oil, as they sit behind the clutch. When it initially happened I went through and collected as many of the plastic fragments as I could find. I did my best to reconstruct the broken gears to ensure I had all pieces, but I could have missed one for sure.
    #27
  8. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    Maz:
    Please don't take offense :beer
    but I am certain that the parts manager was telling me the truth when he said they have never ordered a set of these.
    So just and observable "fact". I'm not saying it's not an issue just saying they've never installed a set,
    nor sold a set across the counter at this dealership.

    The charging system was bad in the early bikes and I think I can kick anyone's ass in a discussion that says different.
    parts manager has sold well into double-digits of new "stator kits" at $1000 each + labor and that doesn't count us home-brew guys...

    http://www.advrider.com/forums/showthread.php?t=890729

    I've got 95K miles on my bike and a real interest in this situation ...
    but it could be that something like a clutch basket that is just a bit under-torqued could explain it.

    The situation leads me to believe that there are some variables here that are, as yet, unaccounted for............
    #28
  9. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    It's that unaccounted for I'm worried about.

    I can say with 99% certainty that the clutch basket was not torqued to spec. Manual calls for 180nm, and there's no way it was at that. Not when I could break it free by putting it in gear with a board under the rear wheel and using a hand powered ratchet.
    #29
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  10. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    Jezus... I'd not looked that up.......................
    For us old guys ... that's 133 ft-lbs ...
    That is the highest torque spec. I've encountered on this bike...
    maybe that's the reason for the "special tool" ??? :beer
    #30
  11. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    :rofl
    I swear BMW has a special tool for everything on that bike.

    A good old generic one-fits-all clutch tool did the trick for me thankfully.
    #31
  12. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    "clutch tool" ... I think i've worked on cars too long ..... pic? :deal
    #32
  13. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    Just a simple device to keep it from spinning while you tighten it down.

    IMG_20200723_215443839.jpg
    #33
  14. The Maz

    The Maz Clueless and lost

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    @JRWooden
    No offence taken. They probably haven't ordered a set of these. I dont think there are that many cases of this happening. It seems though, more people are chiming in that this has happened.
    I just don't know why it did and neither does BMW.
    I had to pretty much stand on a breaker bar to break the nut free on my clutch hub.
    #34
  15. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    Today I got around to draining the oil. I found some metal in there. This is with less than an hour of run time.

    IMG_20200724_171209846.jpg
    #35
  16. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    Thanks!
    Never seen one of those before!
    #36
  17. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    Damn ... still a mystery ... I'm clueless....
    #37
  18. JRWooden

    JRWooden Homeless motorcycle vagabond ... and ... loving it

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    :(
    #38
  19. Cyrotronix

    Cyrotronix Should I do it? ... I'm going to do it.

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    No problem! Tusk makes that one. Inexpensive and very useful. I set that one up and nestled it against my crash-bars. Was able to tighten the nut no problem.
    #39
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  20. shuswap1

    shuswap1 Long timer

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    Could be just flushing out the old metal, time on oil isn't really a factor in that case.
    #40