2004 yz450f back fires


1 reply to this topic
  • jeredlee

Posted March 19, 2008 - 09:14 PM

#1

my 2004 yz450f run great and starts first kick most of the time. but it just started poping and back firing when you rev the bike and let off the throttle what do you guys think is wrong:confused:

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  • grayracer513

Posted March 19, 2008 - 09:42 PM

#2

http://www.thumperta...599#post3710599

http://www.thumperta...613#post3350613





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