fuel mixture screw out or in for colder temps?

2 replies to this topic
  • rljjredhed

Posted January 15, 2005 - 04:19 PM


sorry but i am rookie when it comes to wrenching, it has turned cold in nc and my bike seems to be idling higher due to the temps and not starting on the first kick as it normally does, out or in for the cooler temps on the fuel mixture screw 03 yz450

thanks for the help

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

Posted January 15, 2005 - 04:26 PM


On these carbs it's a "fuel" screw, so out for a richer mix (out for colder temps). If youi can't get enough adjustment with the fuel screw then you may need to go up a size or two on the pilot jet.

  • grayracer513

Posted January 15, 2005 - 04:30 PM


Out. You need to enrich the mixture a bit. Since the screw meters fuel, bacling the screw out makes it richer. Check this procedure out as a guideline:


Related Content


The "going back to the other darkside" adventure... by Monk

Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  94 replies

First Hare scramble tips by dhend8

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

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Is it worth it? (Cam and High compression piston) by macgi77

Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • 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.