Big Bike Advice!

1 reply to this topic
  • AdamsYmh722

Posted June 13, 2006 - 05:36 AM


Hey, my brother just got a 1999 YZ-400f and it needs to be jetted. And we are looking for some advice of what size jets we should start with. We live in Albuquerque, NM and that is at about 6000 ft. And during th summer it is like in the 90's to ride. The bike also has a FMF PowerCore IV exhaust on it. What size jets do you guys run? Thanks a ton for the help.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Matty05

Posted June 13, 2006 - 07:03 AM


go through the jetting specs sticky!

Related Content


05 yz450f not fast enough by RedeyeYZ

Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Megabomb Fitment by 288yz450

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

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 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.