How does oil get in the cylinder

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kevbo82

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Mar 12, 2012
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Besides bad rings and/or valve seals, are there any other ways oil can get in the cylinders? valve adjustment, oil level, etc?
 
Ugh, blow by-suckion around the push rod tunnels and the oil drain hole partially occulded.
 
A failing head gasket. You may not see anything blowing out but that doesn't that it isn't sucking in.
 
Down the outside of the guides is possible if they're loose in the head.

If you have the standard air box / breather set-up, it's quite possible for an overfilled oil tank to pour oil into the air box . Certainly with the Mk2A / Mk3 type, this will allow it to be drawn into the cylinder. With the paper filter, it will usually drip out first.
 
79x100 said:
Down the outside of the guides is possible if they're loose in the head.
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+1 on down the outside of the guides.
Sign of the head not being heated when the guides were removed/installed.
Big problem in the engine reconditioning world generally.

850's breathed into the airbox - oil mist etc.
If this beathing is excessive, the smoke out of the peashooters will remind you of it.
 
i have a small amount of smoke from the pipes at idle (gotta get your eye at the right angle to see it) but then when i blip the throttle i get puffs out of both sides. the bike is going to go to the shop that rebuilt the motor soon to have this checked out, but i just keep trying to check things out on my own in the meantime. any warning signs or things to look for when it comes to head gasket problems?
 
The head needs to be retorqued, 2 or 3 times even, after a new head gasket.
 
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