YZ 426 Spewing Gas from Carb

5 replies to this topic
  • jdswanny

Posted August 21, 2006 - 10:00 AM


01- YZ426

In the last few months the carburator will spew gas out of the overflow hose? after you kick on it a few times and/or after you have ridden for a while and stop to rest. It will even do it if the engine is on while stopped in low rpm. Any suggestions.

  • socksahoy

Posted August 21, 2006 - 10:15 AM


The float is probably stuck, or there is some dirt or junk in the little needle valve assembly that the float opens and closes. I would take the carb off and pull the pin that the float pivits on, then blow out the place where the needle travels up and down with some compressed air.

  • jdswanny

Posted August 21, 2006 - 02:43 PM


Thanks for the reply. I tried and even replaced the needle valve set.

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  • BergRyder

Posted August 22, 2006 - 08:22 PM


There is a rubber o ring inside the carb that will wear out and leak gas. The deterioration of the o ring is much faster with race gas. Replace the o ring and you should be ok. Happened to me a couple of weeks ago.

  • jbrooks26

Posted August 22, 2006 - 08:41 PM


You will also want to check the float height while you are in there. Hope this helps.


  • jdswanny

Posted August 23, 2006 - 01:59 PM


Thanks guys. Did the float height last night. Where is the O-Ring you are talking about????

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