Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0

canadian wr426 jetting help!

3 posts in this topic

There are so many posts on jetting here I'am getting confused.

Please help narrow it down.

My engine stumbles badly aprox.1/8-1/4 throttle. 0-1000' , over 5000' it is almost unrideable.

-'01 wr426 canadian model

-FMF power core IV

-air box cover removed

-wr timing

-stock jetting

-42 pilot -1 7/8 turns out

-DQR needle 4th clip

-165 main

-200 main air jet

-75 pilot air jet

P.S. local dealer will not look at the bike unless it is stock.

Share this post

Link to post
Share on other sites

Try a leaner clip position. The "Q" in DQR gets the taper on the needle cut very high (rich) and the leaner clip position will move the needle down closer to an acceptable range for high altitude riding.

Q-R-S-T-U-V are 1/2 clip each

You are using DQR clip #4, equivalent to DVR#6+(1/2). Looks like DQR#3 or #2 would be better.

Share this post

Link to post
Share on other sites

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
Sign in to follow this  
Followers 0