Has Anyone Adjusted the Head Bearings on a F850GS

Discussion in 'Parallel Universe' started by The Gobbler, Sep 12, 2019.

  1. The Gobbler

    The Gobbler Been here awhile Supporter

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    I have a clunk in the fork on my F850GS and believe it's the head bearings (not sure). Was wondering if anyone has done this? I really don't want to take it to the dealer for something like this.
    #1
  2. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    I saw several people report that the 600 mile dealer service included "Check and Adjust Steering Head Bearings if Required" I have been checking mine at every oil change (coming up on #4) and they have always been good... bike has 5,000 miles now.

    I have a clunk and believe it to be the disc rotors where they float on the hub.
    #2
  3. The Gobbler

    The Gobbler Been here awhile Supporter

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    I certainly would be surprised if it was the head bearings, I've never had to adjust one with many years and thousands upon thousands of miles on bikes. I did initially think it was rotor float, but with the front off the ground, I can push the fork front to back and feel/hear the clunk.
    #3
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  4. bobwolff68

    bobwolff68 Adventurer

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    I'll second the 600 mile comment - talk to your dealer. I believe the head bearing adjustment is a warranty item and so they would likely do it while you wait if they're not too busy (and decent folks - wink). My 600 mile had it listed also. And my wife's 750 also did.
    #4
  5. The Gobbler

    The Gobbler Been here awhile Supporter

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    It was the head bearings.
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  6. Bojan Bojic

    Bojan Bojic n00b

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    Same problem with my BMW F850 GS Adventure, how did you solve it?
    Some picture maybe?
    Can you explain right order of nuts on headset, on mine is first nut with teath, then ruber seal, then second nut with teath, then safethy pin/wascher, then upper crown, then aluminium plug?
    Thanks in advance
    Bojan in trouble :)
    #6
  7. Drunk_Uncle

    Drunk_Uncle Long timer

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    I thought mine were at run in service until I got on the road from Bay of LA to San Francisquito in Baja. Adjusted when I got home.
    #7
  8. The Gobbler

    The Gobbler Been here awhile Supporter

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    I took it to the dealer, I never found the way to do it myself.
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  9. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    I have a service manual ordered when I get it I would be glad to screenshot the procedure and post it.
    I'm sure others have the manual as well maybe they can post it?
    The adjustment is by torque wrench and both the adjusting and lock nuts have external slots so the only way to get a socket on them that I can figure is remove the top yoke/triple...
    #9
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  10. dolomite

    dolomite Adventurer

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    New to bikes in general, but I'm feeling a clunk on mine. It didn't even occur to me that a bike with 2000 miles on it could need bearings tightened. What's the method to check play?
    #10
  11. The Gobbler

    The Gobbler Been here awhile Supporter

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    Usually you hold the front brake and rock the bike back and forth. I felt the clunk in mine so I didn't have to do that. I was surprised that mine needed the bearings adjusted so soon, but that seems fairly common with these.
    #11
  12. Drunk_Uncle

    Drunk_Uncle Long timer

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    Requires two BMW special tools. A socket and an adapter to adjust the bearing.
    #12
  13. OneEyedJack

    OneEyedJack Adventurer

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    I don’t have an 850 but I hope this is a joke.
    #13
  14. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    Probably not a joke the headstock bearing use axially castilated nuts so a special socket is required or you could just use a drift to drive the nuts tight and guess at the torque...

    Here is what a socket would look like.... These are common on 4X4 truck wheel bearings but in much larger sizes...

    [​IMG]
    #14
  15. mazocar

    mazocar Adventurer

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    Who is gonna be the hero to convert the service manual to pdf form and share it with the universe? Then we all chip in $10 each as donation for being such a superb human.

    DO IT DO IT
    #15
  16. Drunk_Uncle

    Drunk_Uncle Long timer

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    A socket like snow dirt showed plus an adapter socket. I will be home Saturday and if someone reminds me I can post pics and tool numbers.
    #16
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  17. SnoDrtRider

    SnoDrtRider I've been lost here before...

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    Here is your reminder! LOL!

    I have the manual now but I need to go get an optical drive later in order to use it.
    #17