06 yz450f smoking on startup


1 reply to this topic
  • psykonautix

Posted February 06, 2016 - 04:50 PM

#1

I just bought a 2006 y450f from someone and it seems to be in really good condition other than it smokes almost as much as my two stroke when I start it up.  Is this normal or is this a sign of worn piston rings/valve seals?  It stops smoking after running for about 2 minutes. 



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  • grayracer513

Posted February 06, 2016 - 06:18 PM

#2

Valve seals are normally the cause of that.  







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