Jetting Help Please for a 2007 WR450F

Can someone please tell me how to jet a 2007 wr450f? The bike is stock except I removed the spark arester. Also, which jetting kit is best? I also made the bike street legal with a lighting kit etc. I aready did the free mods. Thank you, Bruce

i don't own a wr yet, and I have never jetted a bike. I can, however, tell your to browse the threads stuck at the top of this yamaha sub-area. all the info you will need is in there, and also check out thumperfaq.com -- i've been reading as much as I can for the last few days, and have learned a lot.

all the information you could possibly need is there, and done thoroughly. I doubt you will get any better info from the guys browsing this board, as this same question must have been asked 100x by now. there's even a jetting mod area where everyone has posted what they did to their bike, what elevation, etc. find it, it'll help. good luck!

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now