crankcase breather?
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Tourer
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crankcase breather?
Is it normal, or just bad design by harley. I checked my air filter the other day and it was soaked with oil. I have a 02 Night Train Fuel Injected. When I looked harder it was evident that the oil had came in through a hose connected to the lower region of the back plate of where the air filter sitsroutes around and up to connect to another spot behind the air cleaner. I first wondered about it after a well known bike mechanic asked me why they ran that tube like that. 
hell I don't know. He told me it was stock but he never understood it. I think a option would be to get a crankcase breather kit. Any suggestions on the problem or breather kit would be greatly appreciated.
Thanks.
hell I don't know. He told me it was stock but he never understood it. I think a option would be to get a crankcase breather kit. Any suggestions on the problem or breather kit would be greatly appreciated.Thanks.
Ultimate HDF Member
Joined: Mar 2008
Posts: 5,788
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From: SW Florida
RE: crankcase breather?
This is called"fuel stand off". The link below well provide a detailed description.
https://www.hdforums.com/fb.asp?m=3214585
https://www.hdforums.com/fb.asp?m=3214585
Tourer
Joined: Oct 2006
Posts: 486
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From: Texas!!
RE: crankcase breather?
If you're getting more than just a mist of oil through the breathers on a mild to stock engine then you probably have a problem.
Usually it's piston ring blowby or oil pump not scavaging enough.
Usually it's piston ring blowby or oil pump not scavaging enough.
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RE: crankcase breather?
Thanks guys I appreciate the feedback. My vehicle speed sensor was bad a while back and it caused a few minor issues so maybe that caused the excessive oil. K&N on the way. Thanks again.
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