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Thread: F800 ABS brake flush

  1. #1
    God? What god? roborider's Avatar
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    F800 ABS brake flush

    I see there is no tech forum for F800s. Anyone have a link to a brake fluid flush for this bike?
    Rob C. , Raleigh, NC
    '10 R12RT, R90/6
    2007 CBR600RR & 09 V-Star
    Suzuki DR 350

  2. #2
    Back in the Saddle mcmxcivrs's Avatar
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    Ther's nothing really special involved to do it. It's pretty much a standard motorcycle ABS system.

    Not sure if it has the same front resevoir as the ST and GS, if so, you need a special tool to do the cap removal. I've heard it can be done without but it tricky. There's a coulpe of locking tabs that prevent the lid from unscrewing, sort of like a childproof medicine bottle lid. The tool looks basically like just a large thin open end spanner. It slip into the gap below the lid and holds the tab in so the lid can be turned to unscrew it. I made my own from a piece of aluminum sheet, they can be purchased premade too.

    After that, just use whatever method suits you to do the fluid flush.
    Ed Miller, Calgary, AB
    2008 K1200GT, 2009 F800GS
    I can't wait to retire and have a fixed income. The one I have now is always broke.

  3. #3
    Benchwrenching PGlaves's Avatar
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    Quote Originally Posted by MCMXCIVRS View Post
    Ther's nothing really special involved to do it. It's pretty much a standard motorcycle ABS system.

    Not sure if it has the same front resevoir as the ST and GS, if so, you need a special tool to do the cap removal. I've heard it can be done without but it tricky. There's a coulpe of locking tabs that prevent the lid from unscrewing, sort of like a childproof medicine bottle lid. The tool looks basically like just a large thin open end spanner. It slip into the gap below the lid and holds the tab in so the lid can be turned to unscrew it. I made my own from a piece of aluminum sheet, they can be purchased premade too.

    After that, just use whatever method suits you to do the fluid flush.
    It just takes two people. One can press both tabs inward with a couple of little screwdrivers while the second turns the cap. Voni and I did it last week.
    Last edited by PGlaves; 03-21-2011 at 02:07 AM.
    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://www.bigbend.net/users/glaves

  4. #4
    God? What god? roborider's Avatar
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    Thanks guys. I didn't know if it had a separated system like the whizzy RT. And the next to useless Haynes manual says to take it to a dealer since you need the BMW diagnostic tool to do it. When did Haynes manuals become so brain dead? I have one for my 1989 Chevy that is great, even describing how to build special tools. Now, they are just glorified manuals on how to change the oil....
    Rob C. , Raleigh, NC
    '10 R12RT, R90/6
    2007 CBR600RR & 09 V-Star
    Suzuki DR 350

  5. #5
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    See the first append on this thread for a pic. of the BMW-approved tool,
    see the second append for an "improvised" tool that works well, cost nothing and doesn't take up as much space in the tool roll

    http://f800riders.org/forum/showthre...p-Removal-Tool

  6. #6
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    Black rear brake fluid.......

    I picked up my F800 GS adventure in March and I've ridden it 2K.
    I was washing it yesterday when I noticed that the rear brake fluid res. was dark chocolate almost black?

    I've never seen fluid go south so fast, I did a search of the web and see this has been something that's "normal" for this bike for some time.
    Should I change this fluid right now or should the dealer take care of it?

  7. #7
    Debbie's Servant Lee's Avatar
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    I tried to buy the special tool, but my dealer could not find the part number so I improvised and used two blades of a pocket knife.

    Lee 2011 K1300S
    MOA # 30878
    Past BMW Bikes, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  8. #8
    Debbie's Servant Lee's Avatar
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    Quote Originally Posted by bigskyrider View Post
    I picked up my F800 GS adventure in March and I've ridden it 2K.
    I was washing it yesterday when I noticed that the rear brake fluid res. was dark chocolate almost black?

    I've never seen fluid go south so fast, I did a search of the web and see this has been something that's "normal" for this bike for some time.
    Should I change this fluid right now or should the dealer take care of it?
    Are you sure you're not looking at the clutch fluid?

    Does the F800 have a hydraulic clutch or cable?
    Lee 2011 K1300S
    MOA # 30878
    Past BMW Bikes, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  9. #9
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    Dirty brake fluid after two months?

    Yep, it's the rear brake fluid reservoir and the fluid is almost black.

  10. #10
    Debbie's Servant Lee's Avatar
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    Quote Originally Posted by bigskyrider View Post
    Yep, it's the rear brake fluid reservoir and the fluid is almost black.
    Since it's in warranty I would get to a dealer and see what's going on.
    Lee 2011 K1300S
    MOA # 30878
    Past BMW Bikes, 2003 K1200RS, 1991 K75S, 1987 K75T, 1984 R100RT

  11. #11
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    Black rear brake fluid.......

    Check this out.......
    Attached Images Attached Images

  12. #12
    Registered User toooldtocare's Avatar
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    Quote Originally Posted by bigskyrider View Post
    Check this out.......
    My 2007 F800S did that, and my new F700GS is doing it too. It only has a bit over a thousand miles. I think it is normal, so I am going to do like I did with my F8S, and change it next year. I also use the coat hanger trick, works great.

    Wayne

  13. #13
    rabid reader dbrick's Avatar
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    The improvised-from-a-wire-coat-hanger tool described several posts in to the above thread is cheap, easy to make, and easy to use. It took me about 90 seconds to make it.
    David Brick
    Santa Cruz CA
    2007 R1200R

  14. #14
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    Quote Originally Posted by bigskyrider View Post
    I picked up my F800 GS adventure in March and I've ridden it 2K.
    I was washing it yesterday when I noticed that the rear brake fluid res. was dark chocolate almost black?

    I've never seen fluid go south so fast, I did a search of the web and see this has been something that's "normal" for this bike for some time.
    Should I change this fluid right now or should the dealer take care of it?

    my '09 F8GS does the same thing. it's so much easier, faster and cheaper for me to do it than to arrange to bring it in to have my dealer do it .. and they're a great shop and only 10 miles away.

    My vote is DIY- it's fixed now, cost is materials only, and takes less than an hour of your time.
    Ride Safe, Ride Lots

  15. #15
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    Quote Originally Posted by Lee View Post
    Are you sure you're not looking at the clutch fluid?

    Does the F800 have a hydraulic clutch or cable?
    cable
    Ride Safe, Ride Lots

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