Idle Adjustment

3 replies to this topic

Posted September 10, 2008 - 06:56 PM


Is there a set amount of turns to start with when adjusting the idle. It's on a 98' YZ400F. Been messin with it and just want to start fresh. Manual doesn't really say and search didn't turn up anything specific. I'm just interested in the adjustment with the knob for now. Thanks for your time.

  • grayracer513

Posted September 10, 2008 - 08:06 PM


Idle speed, or idle mixture?

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

Posted September 10, 2008 - 08:18 PM


Idle Speed. Sorry , not very clear. Another quick question, Taffy mod worth it or is there a better way of doing the same thing just better? Thanks.

  • grayracer513

Posted September 11, 2008 - 04:59 AM


I don't think there's a listed base adjustment for the idle speed. Just have to guess.

The idea of the Taffy Mod is similar to the BK mod for 426's. It's supposed to limit the length of the accelerator pump shot on the assumption that the bog is caused by too much fuel. It might be good to do, but I would get your bike back to "normal" first and go from there.

Related Content


James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info

  • 0 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • * * * * *
  • 1 review
  • Last review by Tommyk_55
  • On January 15, 2017

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.