hanging idle 00 426

5 replies to this topic
  • s3706

Posted October 26, 2004 - 09:51 AM


I change the stock exhaust cam with an 03 auto decomp cam. I also change the stock fuel needle adjustment to an easy adjust fuel needle. The bike fires up after a couple kick and idles but it seems kind of rough. I have the fuel needle adjusted out 1 1/2 turns. I let it warm up and crank the throttle a couple of times and the idle seems to hang. When it comes back down it idles rough and wants to stall.


Posted October 26, 2004 - 09:56 AM


Whats the pilot jetting set at. 1 1/2 turns is the max it should be turned before changing the Pilot Jet and PAJ.

Bonzai :cry:

  • s3706

Posted October 26, 2004 - 09:59 AM


I am assuming it is stock, but I will have to look.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • s3706

Posted October 26, 2004 - 10:11 AM


If the pilot jet is stock should I go up one size.

  • grayracer513

Posted October 26, 2004 - 11:07 PM


I know you already checked it, because you were just in there when you did the exhaust cam, but one cause of these symptoms is one or more tight intake valves.

  • klokard

Posted October 27, 2004 - 05:39 AM


It's possible you are sucking air through the intake boot also. Make sure you have your carb seated and snugged down. A small dab of vaseline on the boot helps also. Good luck.

Related Content


First Hare scramble tips by dhend8

Dirt Bike   General Dirt Bike Forums   General Dirt Bike Discussion
  • Hot  33 replies

Is the 2016 GYTR Yamaha YZ450F too fast? by Fryboy

Dirt Bike   Special Interest Forums   Pro Racing
  • * - - - -
  • Hot  241 replies

Thinking about Yamaha 250... by Arctic Pride

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  491 replies

YZ450F 03 Sparks driving me crazy by SirAttard

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies

Help with 2000 yz426 by weekend woods racer

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  36 replies

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.