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I have a 1995 susuki rf 900 oil is coming out my motor into the breather box

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  • Motorcycles Master
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How much oil , have you checked oil level correct , if you run the engine is there a lot of air pressure blowing out of the breather pipe and if so then you got crank case pressure build up and got a problem with rings or valve stems or seals etc ! check compressions too ! P..

Posted on Dec 25, 2013

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Posted on Jan 02, 2017

  • 2712 Answers

SOURCE: oil blow out the breather

An overfull oil tank will do it. Even if not overfull just about all harley's will blow oil out the air filter. Unless there is a bunch of oil coming out, it's not a problem What I've found is that the air filter eventually gets saturated and then starts to leak through. The level in the oil tank doesn't seem to matter. If you change the air filter the problem goes away, until the new one gets saturated and then it starts all over again. My plan is to get a K&N air filter, which you can clean yourself and save having to buy a new air filter every 4,000 miles or so.

Posted on Nov 20, 2008

  • 420 Answers

SOURCE: oil blow out the breather

This is a common problem on all sportsters, they have an oil blow by that dumps it into the air filter. I have found that if I run about a half quart low the problem goes away.

Posted on Mar 04, 2009

onyeredson
  • 404 Answers

SOURCE: oil leaks from breather box

Hi!
From your brief description It sounds like you are experiencing Crank Case pressure build up.
I presume your ZZR is of High mileage or possibly previous owners havn't serviced it regularly.
The problem being the compression Piston Rings wear and allow Blow Back gasses into the crank case there by building up pressure, this in turn sends an oil film up the breather tube to your air box resulting in your problem.
You could try an oil & filter change (Synthetic) Top jolly with maybe an additive plus similar for the fuel i.e. Red-Ex or similar, it may help but I doubt a cure.
If you want you could extend the breather pipe away from the box into a drip can or similar, be sure to filter it as you don't want to get contamination down in the cases.
Hope this sorts it for you?
Please press the Blue Button for appraisal of my FREE! Effort.
Thank You! & Good Luck.
Paul 'W' U.K.

Posted on Mar 05, 2009

raffaiel
  • 209 Answers

SOURCE: oil breather problem

keep your oil breather unblocked all the time's coz the pressure of it can destroy your gasket and oil seal.

Posted on Apr 15, 2009

wd4ity
  • 4565 Answers

SOURCE: 89 Harley FLTCU oil coming from the crankcase breather tube and

This is an age old problem for the Harley engine. In you 89 model, the crankcase breaths from behind the oil pump through a tube that runs to the backside of the air filter assembly. Most people that I know, simply remove the tube coming up to the air filter and block the hole in the air filter assembly backing plate. At the breather, they run a short hose to just behind the transmission and cut it off there. This is similar to the earlier Shovelhead engine and the way it breathes. In 1994, Harley went to the "head breather system" which was better but it still gets oil into the air filter assembly.

There is one thing I saw on the aftermarket assessories market once called a "CatchCan". The breather tube ran to it and it seperated the oil from the air and the held it in a small container to be emptied on a regular basis. I have never used one nor have I ever seen one so all I can tell you is what the book said. Matter of fact, I cannot remember where I saw it now. Custom Chorme catalog, maybe. Good Luck, Steve

Posted on Apr 30, 2010

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