Yz450 won't hot start

4 replies to this topic
  • 2_strokin

Posted October 30, 2014 - 06:18 AM


I have a 08 yz450 that cranks when cold but when hot it almost seems like it locks up. And then I kick and kick and kick but won't start till it get cooled off? Help!!!!! Please

  • ipsullivan

Posted November 02, 2014 - 05:17 PM


Verify that your hot start cable is functioning and that the plunger is not seized. Your fuel/air mixture could be off.

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  • 2_strokin

Posted November 03, 2014 - 06:43 AM


Would that cause it to kill out also?

  • vossman59

Posted November 03, 2014 - 02:38 PM


Check your valve clearances. I would almost bet that your intake is out of wack. This will cause difficult hot starting.

  • vossman59

Posted November 03, 2014 - 02:41 PM


All you would have to do is reshim the valve that is out of adjustment. Not to difficult to do but if you not comfortable I think it costs around $150-200 to have a shop do it. If you do it your self get a hotcams shim kit $70 and your set.

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