starter back fire/ jetting?

2 replies to this topic
  • bonecrusher69

Posted February 29, 2004 - 06:09 PM


I have a 03 WR450. I did all the free mods and replaced the main jet with a 168. The starter jet is drilled to .028, about 2 1/2 turns on the fuel/air screw. The bike starts instantly but a split second before it starts there is a sharp snap like sound from the exhaust. Other than that the bike runs great. any ideas out there. :) Thanks

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  • Indy_WR450

Posted February 29, 2004 - 06:36 PM


Buy the JD jetting kit from this forum's store and follow his basic instructions. You will be happy with the results. Backfiring will be minimized. I do not recommend drilling jets. Buy a 48 pilot jet and a 72 starter jet as well. That should complete your jetting needs year round. :)

  • bonecrusher69

Posted March 01, 2004 - 05:42 AM


Thanks Indy I'll do that, :)


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