changing exhaust back to stock {what jetting}?

2 replies to this topic
  • rgd420

Posted April 19, 2005 - 01:46 PM


99 yzf 400 has an fmf on it way to loud,,, just got a cheap stock exhaust, im around sea level,,, dont know whats in the carb yet havent takin it apart,, any good basics on what main, pilot needle clip and if i should run a different needle? runs good now just WAY to loud i dont mind :naughty: but other might :naughty: thanks

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

Posted April 19, 2005 - 07:12 PM


How about putting on the Q from FMF? Here in CA it passes the sound test on my 1998.

I can give you the jetting specs from my manual if that will help, or the specs at where I have mine jetted now. I had the 4squared FMF on there, and did not have to make any changes going to the Q

let me know,


  • rgd420

Posted April 20, 2005 - 07:14 AM


yeah i was looking at that,, was just trying to go as cheap as possible :naughty: figured i could get an even swap for the price of my fmf tot he stocker on ebay but im goign to look into that q some more thanks!!

Related Content


Megabomb Fitment by 288yz450

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply

Yamaha YZ450F 2017 by Chris.GVS

Yamaha YZ450F 2017
  • - - - - -
  • 0 reviews

100 hrs on 2014 yz450f, shim valves or replace them? by ttr230rider6

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  79 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

James Stewart back on a YZ450F by YamaLink

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 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.