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Old 04-18-2010, 06:32 PM   #1
cornishpride OP
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BMW G450X Oil Leak

Got back from a ride today and noticed oil, ever so slightly coming from here (see photo).
Not even sure what I am looking at. Thought maybe it was an overflow valve and when they (BMW)
did the 2hr oil change they overfilled.
Anyone have any ideas?
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Old 04-19-2010, 04:47 PM   #2
AndyE_UK
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There's a breather into the airbox and if overfilled or dropped oil will drip down onto the left hand side of the bike. Check under the left hand plastic to see if theres oil on/around the bottom of the airbox.
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Old 04-19-2010, 04:59 PM   #3
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Will check. Thanks.

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After a quick ride this evening and a wash, I checked the bottom of the airbox and no oil,
but there was more in this small... I don't even no what to call it, spot.

cornishpride screwed with this post 04-19-2010 at 08:17 PM
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Old 04-20-2010, 07:21 AM   #4
AndyE_UK
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Can't see anything obvious on my 450 about that spot and I've not heard of any other leaks from that area. I suppose there could be an overflow on the top of the case there but the parts diagrams don't really help. Have you checked the oil level as per the handbook as I've found my 450 real easy to overflll. Any oil on the frame tubes or wiring directly above that point as my money's still on something higher up leaking (but then I never was a good gambler)?
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Old 04-20-2010, 07:52 AM   #5
cornishpride OP
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I'm going to pull the plastic off and go over the area with a fine toothed comb.
Does your 450 have that small "small" on top of the case?
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Old 04-20-2010, 09:03 AM   #6
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Quote:
Originally Posted by AndyE_UK
There's a breather into the airbox and if overfilled or dropped oil will drip down onto the left hand side of the bike. Check under the left hand plastic to see if theres oil on/around the bottom of the airbox.
That would be my guess too. Don't over fill the G450X or it will get everywhere and affect performance.
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Old 04-20-2010, 09:13 AM   #7
cornishpride OP
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Thanks Bobby and Andy for the replies.
Will let you know what I find.
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Old 04-20-2010, 11:05 AM   #8
AndyE_UK
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Quote:
Originally Posted by cornishpride
I'm going to pull the plastic off and go over the area with a fine toothed comb.
Does your 450 have that small "small" on top of the case?
Mine does have that thing but I'm no engineer so don't know what it is! I suppose it could be a breather of some kind but I've never seen anything come out of it.
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Old 05-01-2010, 06:50 PM   #9
cornishpride OP
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Well I did a thorough check and found no oil leaks or run off from overflow on the left side.
Went for a ride today and wiped off all residual oil from this spot.
After 30 minutes I checked again and some more oil had seeped out.
Going to contact the dealer on Monday and see what they have to say.
Hoping it is just an overflow valve of some kind.
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Old 12-09-2014, 03:49 AM   #10
MudMan_79
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Hi,
Anyone has any more info abt this? How to prevent it? Its happening to my bike now, did not overfill. Cant figure out whats wrong.
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