R1200GS Rear Brake Reservoir

Discussion in 'GS Boxers' started by John F, Sep 15, 2019.

  1. John F

    John F Been here awhile

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    Anybody else have this break? The mass of the reservoir and fluid is pretty much cantilevered off the mount and the hose. I figure that while riding some of the extremely rough rocky trails I was on in Quebec a couple weeks ago, I probably hit the natural frequency of this cantilevered mass more than once, and had it wagging around real good until it broke near the mounting bolt.

    Lucky a buddy had some zip ties, and he rigged some extra support (the mount isn’t cracked all the way through - but it’s close). I figure when I get the replacement part installed, I’ll add the zip ties to keep it from wagging around in the rough stuff.
    A0419911-ADBE-4C83-A57C-C91073EEF24A.jpeg
    #1
  2. Motorius

    Motorius Road trippin' Supporter

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    Like everything else, there is an aftermarket metal guard sold for those.

    Only ride street but bought one as that looked pretty exposed to me. Hasn’t broken yet.
    #2
  3. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    That is the first I have seen break. If it was loose the vibration could break it. None of the "protectors" would have helped that unless it was from an impact.
    [​IMG]
    #3
  4. Dan Cãta

    Dan Cãta Long timer Supporter

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    @JimVonBaden perhaps the upper tabs would keep it from moving/vibrating. I bet the manufacturer did not think of this, but it definitely helps.

    Dan.
    #4
  5. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Possibly. But, to be fair, I have never before seen one of these break that wan't impacted by something.
    #5
  6. John F

    John F Been here awhile

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    Mine was definitely not impacted by anything.
    #6
  7. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Was the bolt loose? Must have been VERY rough stuff.
    #7
  8. Pch123

    Pch123 Bar Crossings

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    When was the last time the rear brake was bleed and who did it? My guess is that was when it was cracked and then vibration completed the job.
    #8
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  9. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    :nod could be. That cap is often very tight.
    #9
  10. John F

    John F Been here awhile

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    All maintenance to date (41000 miles) has been done by the BMW shop where I bought it new. Cracking during maintenance is a definite possibility. But I’d like to think the shop would be more careful than that. Maybe not.
    #10
  11. Boxerbreath

    Boxerbreath 2017.5 GS Black Storm

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    Who makes that cover Jim?
    #11
  12. JimVonBaden

    JimVonBaden "Cool" Aid! Supporter

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    Virtually everyone. I got mine from Kildala, an inmate here. You can find him in Vendors. If you pay more than $20, you are overpaying. AliExpress has them for like $5.99.
    #12
  13. ERrider

    ERrider n00b Supporter

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    Just found mine in the same condition, top arm broken, no impact. Where did you get your replacement reservoir?
    #13
  14. John F

    John F Been here awhile

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    I ordered it at the parts counter at my local Max BMW. $37. When I installed it I added zip ties to hopefully keep it from wagging around in the future.
    A2164A69-5A8C-4D9E-9C4D-3F7879FF5A63.jpeg
    #14
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  15. Clayshooter08

    Clayshooter08 Ridin Da Beast!!!! Supporter

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    Dang it!!! Now I have to go home and check mine!!!!
    #15
  16. ERrider

    ERrider n00b Supporter

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    Guess I’ll be doing the same! Order in for part and a guard as well.
    #16
  17. rtb

    rtb Adventurer

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    Another one. 2015 with ~50k miles. Have no idea if anything hit it. IMG_3132.JPG
    #17
  18. Boxerbreath

    Boxerbreath 2017.5 GS Black Storm

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    Probably made of nylon that gets brittle after time. There’s a lot of heat coming up in the right side too.
    #18
  19. Truett08

    Truett08 Adventurer Supporter

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    The 2015 GSA I picked up this weekend with 36k miles has this same issue, I plan to fix it then install some kinda protection for it once NC lifts some restrictions. From what I can tell, the PO did some pretty serious off-road riding so I assume it was either impacted or vibrations eventually got to it.
    #19