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Old 02-01-2010, 10:32 PM   #1
Just Dan OP
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Joined: Jun 2006
Location: Hobart, Tasmania
Oddometer: 1,900
What happens when you tip your airhead on its side?

My gear lever seal was leaking and I lowered the R100 softly on its right hand crash bar and replaced the oil seal. Now when I start it up for 5 secs or so it blows a lot of blue smoke. It seems engine oil has made its way up into the oil breather system and into the carbie. I can put my finger underneath the plastic inlet to the carbie and feel oil. Am I on the right track?

The bike only blows blue smoke on cold start up. Once going or starting when warm. The bike blows no smoke at all.

The engine oil level is just over 3/4 full. I have not over filled the engine, as that will force oil into the breather pipe.
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Old 02-02-2010, 12:05 AM   #2
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When parked and leaned to one side, it's normal for oil to creep into your intake and burn on combustion. Thus, the blue smoke. I rarely park using the sidestand to avoid this. The S/S for me is only for quick stops and to avoid the bike tipping over when dismounting.
92 R100GS-PD Euro
01 Vespa PX150E - sold
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Old 02-02-2010, 06:17 AM   #3
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Location: Madison WI
Oddometer: 3,477
That's how you usually replace that seal so that's ok. My guess is the issue will go away. It's my experience that any thing over the half way mark on the oil dipstick is over filled on an airhead. They almost all seem to just use oil until it gets down to half then it stops.

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Old 02-02-2010, 07:12 AM   #4
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Oddometer: 1,185
Well, It sounds like you might give the airbox and related hoses a good cleaning out...If you got a bunch of oil in there it works it's way down into the carbs gradually.

I bet it clears up. But a little smoke on startup is in the range of normal for these engines. Hold it upright for 30 seconds after you shut it off. Then put it on the side stand, Get off, Then put it on the center stand.

I only use the side stand for quick offs and on's. Like beer stops.

'03 BMW R1200CLC "Flipper"(Tis but a scratch!)
'01 BMW R1100RT "Lucky"
'91 BMW R100GS "itsnotamoneypit"
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Old 02-02-2010, 11:09 AM   #5
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We spent the night in an Alpine, AZ, motel, and I parked my G/S on its sidestand, as I do everywhere except my garage.

We arrived early, and soon thereafter the motel was filled with Harleys.

Next morning those guys were right there watching as we loaded up (what's that "tankbag" thing?) and they got a facefull of smoke when I started up. I liked it.
Kent Christensen
'12 R1200RT, '02 R1100S, '84 R80G/S
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Old 02-02-2010, 11:52 AM   #6
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Joined: Aug 2006
Location: Tasmania
Oddometer: 70
Good Morning Dan,

Have you had a look at the crankcase breather? It coupld be a problem with it. I had something similar happen on my cafe racer.

Im back home in Hobart today and will give you a call, Where's gadget when you need him?

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