04 yz450f jetting?

4 replies to this topic
  • yamithump44

Posted March 17, 2010 - 12:18 PM


the bike sputters slightly on mid-top end. clutch was acting funky too. i ripped apart the disks and such and reinstalled em and that problem was fixed. the choke needle is slightly bent as well. could this be my problem? or is the jetting off? engine is stock besides and FMF Q slip-on. ill be replacing the choke needle regardless but am wondering if i should order a jet kit with it.

  • yamithump44

Posted March 18, 2010 - 06:00 PM


no one?

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  • yamithump44

Posted March 20, 2010 - 08:54 PM


up one to a 45 pilot?

  • grayracer513

Posted March 20, 2010 - 09:01 PM



What's a choke needle?

Why change the pilot when your problem is mid/top?



  • yamithump44

Posted March 21, 2010 - 06:10 AM


sorry, meant the choke plunger.

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