yz 450 jets


2 replies to this topic
  • GIX1

Posted July 28, 2004 - 05:07 AM

#1

Can everyone or anyone give me some main jet numbers that you have in your bike with a aftermarket exhaust on a 2004 yz 450f just experimenting. Thanks!!

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Hank

Posted July 28, 2004 - 06:34 AM

#2

Did they change much on the '04 vs the '03 carb??? I was thinking the only change was that throttle position sensor.... At any rate my '03 at 4000 - 5500 ft elevation (Roughly) I run stock main jet, I beleive 165, with a dual uni air filter. I have a fmf power bomb to fmf t4 titanium 14" pipe. I can tell by the plug I am a little rich... might be from riding when I get a little dirtier than expected air filter.... If I drop the main, to lean, if I drop the needle one clip I loose top end, I run great on a fresh filter, but still pop a little but I get the performance I like. I havent tried changing the pilot jet or air jet yet I am going to get the zip-ty fuel mixture screw today and see what I can get done with that... :thumbsup:

  • GIX1

Posted July 30, 2004 - 04:14 AM

#3

anyone else have a 04 450 ??????? What main jet are you running with aftermarket exhaust???? Anyone





Related Content

 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.