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Thread: Nasty noise coming from the rear today . . .what is it?

  1. #1

    Nasty noise coming from the rear today . . .what is it?

    Noticed a nasty sound while riding today. Parked it and took this video. New to BMWs (F700gs) so maybe someone can identify this for me? Thanks so much!
    Greg
    MOA #218215

    2015 F700GS

  2. #2
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    Have you looked at the parts breakdown? If it has the pie shaped rubbers that act as a bit if a cushion-drive that the F800GS has......Sounds like they have gone a bit dry and hard and are flopping around.
    Not hard to check really. Good time to check the wheel bearings while your in there.
    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
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    2009 F800GS 1994 TW200

  3. #3
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    Sounds like it only knocks when the wheel is turned backwards, at least what I heard on the video you attached.

    Sorry, I can't help since my ST has a belt drive and I've never heard anything like this.

    Good luck.
    Royce
    On the coast of Kansas
    2012 F800ST

  4. #4
    SURVIVOR akbeemer's Avatar
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    GasEx. The solution for nasty rear end noises.
    Kevin Huddy
    The Outpost, Silver City, Montana

  5. #5
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    rear end

    Sound like the four rubber wheel dampers. Hold the sprocket and chain from moving then try moving the wheel forward and back. You should not be able too. Then take the rear wheel off and check dampers and bearings.

  6. #6
    Lost again Texpaul's Avatar
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    You don't say how many miles on the bike, especially the rear sprocket.
    The rubber bumper check is good advice but there are three other possibilities. The rear wheel bearings, the rear sprocket and the chain. I seem to remember having to redo the rear wheel bearings on my wife's 650 twin at somewhere around 60K. If the rear sprocket is very worn the teeth may be snagging on the chain as the wheel is rotated backwards (wouldn't make that noise rotated forward). Check the chain for a kinked link.
    Paul Mulhern
    MOA# 56330
    The biggest mistake people make... is thinking they have time.

  7. #7
    Removed the rear wheel and the bearing inside the sprocket hub fell out in pieces . . . damn. Ordered new bearings and will have to make a trip to a dealer for a once over and install.. Hope I didn't do any nasty damage.
    Greg
    MOA #218215

    2015 F700GS

  8. #8
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    Not sure if this is common to your bike

    https://forums.bmwmoa.org/showthread...gs-on-a-F800GS

    May give you some ideas.

    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  9. #9
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    What was the condition of the dampers?

  10. #10
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    Quote Originally Posted by Omega Man View Post
    Not sure if this is common to your bike

    https://forums.bmwmoa.org/showthread...gs-on-a-F800GS

    May give you some ideas.

    OM
    Omega Man ,so I see you have been down the bearing path before.

  11. #11
    Fortis Fortuna Adiuvat Omega Man's Avatar
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    Quote Originally Posted by EUGENE View Post
    Omega Man ,so I see you have been down the bearing path before.
    Yeah, been down a lot of paths

    On that path there was a problem but wasnít where I thought it wuz

    OM
    "You can do good or you can do well. Sooner or later they make you choose." MI5
    Mod Squad
    2009 F800GS 1994 TW200

  12. #12
    Quote Originally Posted by EUGENE View Post
    What was the condition of the dampers?
    Dampers were good. Intact and no noticeable wear. I am really surprised by the bearing disintegration. I have ridden many cycles in my lifetime and have never had this type of problem. Especially at mileage less than 6k. This bike was pre-owned so I donít know what the previous owner might have done to cause such a failure.
    Greg
    MOA #218215

    2015 F700GS

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    mileage

    You never did say what the mileage was???

  14. #14
    Back in the saddle again mikegalbicka's Avatar
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    Quote Originally Posted by EUGENE View Post
    You never did say what the mileage was???
    but he did say "at mileage less than 6k"

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    I miss something.

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