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Thread: F800S cutting off under power

  1. #1
    Registered User
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    Nov 2011
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    Winston Salem, NC area
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    F800S cutting off under power

    I have a 2007 F800S that will randomly shut off. A year ago it seemed to only occur when cold and a few miles into a ride but it has happened twice in the past month 50+ miles in a ride. It happens when slowing down, pulling off an exit or coming to a stop. Can anyone offer an opinion to what's causing this or what I could check?

  2. #2
    Benchwrenching PGlaves's Avatar
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    Oct 2003
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    "Big Bend" TX
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    Check for vacuum leaks at the small hoses to the throttle bodies.
    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

  3. #3
    Riding where it's hot! AZ-J's Avatar
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    Mar 2007
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    Scottsdale, AZ
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    My F800S was declared a lemon due to this issue @18 months old. NA could not fix it, it was dangerous, and I was paid well by them.
    My bike shown here
    Jordan M, MOA #24434
    My Blog

  4. #4
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    Could you can me some more history around what you tried or what the dealership replaced@

  5. #5
    Riding where it's hot! AZ-J's Avatar
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    Mar 2007
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    Scottsdale, AZ
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    I cannot remember all the acronyms but the third visit, the main network (CanBus) was replaced. Part of the problem since I was the first, BMW (neither dealer nor NA) could reproduce the problem (it took about 1-2 hours to surface). Finally, my dealer acquired a dyno, and 2:03 (two hours and three minutes) the bike shut off. That was the fourth visit, and since NA would not replace the (excuse the try) BSK, they bought it back.

    The first time, and the second they replaced fuel filter and air filter plus ignition interlock for the second time. Nothing helped.
    My bike shown here
    Jordan M, MOA #24434
    My Blog

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