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Thread: Oil head valve adjustment question

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  1. #1
    Registered User jpm1074's Avatar
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    Oil head valve adjustment question

    Going to do a valve adjustment on my R1150GS and don't have a lot of experience with boxer motors. Purchased feeler gauges from wunderlich watched several videos on youtube on the subject and still have a couple of questions. When you find the "OT" mark on the flywheel via the inspection hole, are both cylinders at top dead center? Do you adjust the valves on both cylinders at that time?

    Thanks in advance for input.

  2. #2
    Lucky motorradmike's Avatar
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    Both are at TDC but only one side can be adjusted.

    You need to read up on this.
    I'll try to find a link for you, there are many.


    Edit: I can't find the one I'm looking for. If you look around here for a while you'll find a wealth of information.

    Tip:
    - You don't need to find TDC by removing the inspection plug, you can instead look at the arrows on the cam drive sprockets.
    Last edited by MotorradMike; 01-20-2013 at 03:30 PM.
    Mike Marr
    1978 Yamaha XS750 (Needs rings), 1996 BMW R1100RS, 2004 Honda CRF230F

  3. #3
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    we got your valve adjustment thread right here!

    Ride Safe, Ride Lots

  4. #4
    Benchwrenching PGlaves's Avatar
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    1. Set timing mark to OT
    2. Remove both valve covers.
    3. Identify the side (left or right) where you can feel slight play in intake AND exhaust valve rockers. Verify by observing that on the other side all valves/rockers have no gap.
    4. Adjust the valves on the side where you observed the play/looseness/gap.

    THEN
    5. Rotate the engine clockwise from the front exactly ONE full revolution until the OT mark again appears centered in the window.
    6. Verify that the valves on the side you just did are tight, and on the side you are about to do are loose.
    7. Adjust the valves on the second side.
    8. Reinstall valve covers.
    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

  5. #5
    Geoxman KJ6OCL's Avatar
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    Quote Originally Posted by PGlaves View Post
    1. Set timing mark to OT
    2. Remove both valve covers.
    3. Identify the side (left or right) where you can feel slight play in intake AND exhaust valve rockers. Verify by observing that on the other side all valves/rockers have no gap.
    4. Adjust the valves on the side where you observed the play/looseness/gap.

    THEN
    5. Rotate the engine clockwise from the front exactly ONE full revolution until the OT mark again appears centered in the window.
    6. Verify that the valves on the side you just did are tight, and on the side you are about to do are loose.
    7. Adjust the valves on the second side.
    8. Reinstall valve covers.

    +1 for Paul

    Lkarl KJ6OCL

  6. #6
    Registered User
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    cam diagram is on page 2 of this thread:
    http://forums.pelicanparts.com/bmw-r...-valves-2.html

    and i will do something I never do, and disagree with Paul G.
    Pull valve covers first (they have to come off anyway, so why ont), and use the cam gear. i have not bothered pulling the timing hole plug in over 10 years, and set my valves at least 1x/yr.
    Ride Safe, Ride Lots

  7. #7
    Registered User jpm1074's Avatar
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    Thanks For the quick response! Watched a ton of videos on YouTube and most only show adjustments on one cylinder and don't mention the other cylinder. I also purchased a service manual for my particular bike and the instructions are vague at best. Can you elaborate on the cam gear markings a little more?

    Thanks, J.P.

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