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2005 hyunsung comet 250 blowing oil and gas out of breather while running.

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It may be running ridiculously rich or the float in the carburetor is stuck open and pouring fuel into the cylinder while it sits. Drain the oil and if fuel is in it, you probably have a carb issue. Getting oil in the air filter box is not unheard of because a hose connects the crankcase to the breather box to let unburned fumes back into the cylinder. I'm not familiar with this bike but I've known some bikes had a tendency to cough up oil into the air intake if you ran it wide open on the throttle. The older big displacement kawasaki vulcan cruisers come to mind.

Posted on Nov 14, 2016

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6ya6ya
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Posted on Jan 02, 2017

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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

Techjoel
  • 79 Answers

SOURCE: i have 2003 ninjia 250 it was running good then

Fuel starvation most likely caused by plugged fuel filter. Best way to check/fix is to drain gas tank then remove on/off/res petcock assembly. Filter is removed with assembly and can be cleaned with carb cleaner, blown out with compressed air, and re-used. Do not get solvent or carb cleaner on any rubber parts as this will harden them. Re-assemble and start with fresh gas. Oil in breather is normal if not excessive and can be sign of clogged air filter or worn rings. Fix fuel and air filters and re-check. Good luck, Techjoel

Posted on Jun 05, 2009

  • 420 Answers

SOURCE: there's oil blowing out my enghine oil breather

This is common the solution is to run the oil half way between full and low.

Posted on Jun 21, 2009

burgessjay69
  • 78 Answers

SOURCE: 2006 KX250F blowing oil out breather should I be concerned?

hi
ther is a chance that being over filled will blow out of the crank breather so drain off to the correct level if then the bike still does this then you have to high crank presure meaning the bore and piston/rings are badly worn
thanks jay

Posted on Jun 23, 2009

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hi
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thanks jay

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