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Thread: 09 R1200R Oil Out RH Airbox

  1. #1
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    09 R1200R Oil Out RH Airbox

    Last October I had the failed fuel strip changed by the dealer in Canton, MI and since then a friend noticed oil seeping out from the RH side of the air box, where the tube exits the air box, to the engine. I asked the dealer if there was a possibility if they had pinched a vacuum line when they reinstalled the tank and they were mostly silent. They also said not to worry about it and there was a drain plug in the bottom of the air box to drain any oil that did accumulate. I couldn't find the plug, couldn't get the air tube to separate from the box even with the clips pulled and finally gave up. I wiped it off, drove another 50 miles and the oil reappeared. Anyone with any experience in this issue?

  2. #2
    MOA #24991 Pauls1150's Avatar
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    Not directly, but have you verified that the oil level has not been Over-filled a bit? That's a common cause of airbox oiling.

  3. #3
    Registered User websterize's Avatar
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    Like this, right?



    The inside of your airbox is likely splattered with engine oil from overfill, and it's pooling at the bottom of the air box, thus the seepage. Don Eilenberger had to clean out his, too. I'm fairly sure this was caused by filling to max (as BMW advises) site glass. The problem? I did it with cold engine oil -- it heats up, expands, splatter city.

    Since I began filling to the center dot on the site glass, and only after riding, the oil on the seam hasn't reappeared.
    Bill Webster
    2013 K 1600 GT
    2009 R 1200 R alumnus

  4. #4
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    09 R1200R Oil Out RH Airbox

    Gee, that looks like you snuck into my garage and took a photo of my bike. When I changed the oil I did put in the recommended amount of oil and it's just above the center line of the sight glass. I'll let it blow down a little and see if it stops. Thanks!


    Quote Originally Posted by websterize View Post
    Like this, right?



    The inside of your airbox is likely splattered with engine oil from overfill, and it's pooling at the bottom of the air box, thus the seepage. Don Eilenberger had to clean out his, too. I'm fairly sure this was caused by filling to max (as BMW advises) site glass. The problem? I did it with cold engine oil -- it heats up, expands, splatter city.

    Since I began filling to the center dot on the site glass, and only after riding, the oil on the seam hasn't reappeared.

  5. #5
    Registered User websterize's Avatar
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    No matter what level in the site glass, until you clean the inside of the air box, you might continue to see oil seepage on the throttle-side seam. If you remove the air filter, you can reach inside to wipe up the droplets. Soaking up the pools at the bottom of the air box requires some hand gymnastics, especially if you have large hands. And don't be a boob like me and drop your Surefire LED inside the airbox.
    Bill Webster
    2013 K 1600 GT
    2009 R 1200 R alumnus

  6. #6
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    overfilling - my 2 cents

    Too much oil can lead to foaming due to mechanical agitation. Foaming leads to oxidation and air entrainment in the lubrication system. both are bad, but I'm not sure how bad. I wouldn't run that way.
    It's worth a double or triple check.
    Eric * Columbia SC
    Piedmont Red 2006 R1200RT

  7. #7
    Registered User 185274's Avatar
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    Here is my left side - the issue was overfill:
    IMG_0014.jpg

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