oil dripping from breather tube

5 replies to this topic
  • 2001YZF426Rider

Posted July 30, 2008 - 07:15 PM


My 426 drips oil out and leaves a small puddle about the size of a half dollar almost every time i shut it down after riding it. It is only ridden on the street now. Could it be because of the higher speeds? Does this indicate anything? I plan on re-routing it into a bottle in the airbox.

  • grayracer513

Posted July 30, 2008 - 07:29 PM


Does this indicate anything?


  • Justin89

Posted July 30, 2008 - 08:43 PM


Thats normal...even if you see a little white spludge dripping out, that's normal too:thumbsup:

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  • 2001YZF426Rider

Posted July 31, 2008 - 07:27 PM


Well looking at it today, its more then the size of a half dollar. Its probably 2-3'' diameter.

  • grayracer513

Posted July 31, 2008 - 08:15 PM


That may be a little more than normal. Excess breather oil comes from;

> Overfilling. Harder to accomplish with a 426 than other bikes.

> Riding very hard. High RPM's and heavy throttle loads will carry more oil into the crankcase vent.

> Tired engine. Worn rings leak combustion gasses into the crankcase, vaporizing more oil, and increasing the net outflow through the vent, carrying oil with it.

  • 2001YZF426Rider

Posted August 02, 2008 - 07:58 PM


Well i would have to say the RPMs are usually high from riding it on the street. and i have had it for 4 years now and havent re ringed it so.. Maybe putting new rings on it would be a good idea

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