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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 17 Feb 2014
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Oil in airbox -

1993 XT 600e: 6,500 miles I finally changed the air filter. Was really plugged and noticed oil in the bottom of the airbox, quite a bit. Is anything damaged? What to look for now. Thanks
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Old 17 Feb 2014
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Wouldn't worry about it. Will just be oil from the filter.
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Old 17 Feb 2014
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So you don't think there is a line blocked, screen plugged? Thanks
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Old 17 Feb 2014
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There are a few reasons why oil would get into your air box. It's fairly common, not to worry. But here are some reasons why and fixes:

Make sure your crank case vent hose is not pinched and that it's routed correctly. It should feed into air box.

If crankcase oil level is over filled, excess oil will be pumped out of crankcase vent hose and into air box. Engines do not like to be overfilled with oil, so make certain level is correct.

Some bikes, when run at high rpm for a long period, (motorway) can pump oil into air box. If your rings are worn, then this can be more common. (tech term: Blow by)

If the air filter is OVER-oiled, then excess will run down into air box. A sticky foam filter oil is best ... use sparingly.

Keep air filter and Air Box Clean.

Good luck!
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Old 17 Feb 2014
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"Some bikes, when run at high rpm for a long period, (motorway) can pump oil into air box. If your rings are worn, then this can be more common. (tech term: Blow by)"
Compression is good, I think the 15 miles of interstate to the mountains is the issue. Probably running close to redline for a while. Thanks
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Old 17 Feb 2014
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You have overfilled it with oil.

Mezo.
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Old 17 Feb 2014
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Any damage done?
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Old 18 Feb 2014
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Quote:
Originally Posted by Provick View Post
Any damage done?
Shouldn’t be an issue, its a common thing to do.

Mezo.
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