yz450f weird backfire

2 replies to this topic
  • ktmracer53

Posted April 30, 2011 - 06:58 PM


My bike never backfires, one day i was ridding to my friends house and i let off the gas and it was backfiring? *** then i sped up and did the same thing and it didnt backfire. It does this every once in a while. Could it be the hotstart cable like getting stuck or something? it starts on first to third kick every time.


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  • YZPaGuy

Posted April 30, 2011 - 07:10 PM


Mine was doing the same thing. Just had it fixed. Main jet in mine was too big and the carburator needed adjusting. Doesn't do it anymore.

You probably need a carb cleaning.

  • yz450fcranker

Posted May 01, 2011 - 04:27 AM


rejet new spark plug some mechanics eagle eye will do it

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