Sign in to follow this  
Followers 0
ktmlane

used wr426 mods

5 posts in this topic

hope someone can help. just bought a used 2002 wr 426f and would like to know all the mods and jetting i need to do.never owned a yamaha before and any help would be appericated. thanks guys:ride: :thumbsup::smirk:

Share this post


Link to post
Share on other sites

I'm surprised you lasted to 7:45 (my time) without someone screaming at you. Everything you need can be found at the top of this forum. But to get you started and assuming that none have been done:

1. Change the throttle stop to ZY.

2. Remove the exhaust baffle and replace with a PMB or Yamaha insert.

3. Remove the air cleaner cover.

4. Search on the YZ timing or auto-decompression cam.

5. Probably go up a size on the Main.

6. Search for the Grey Wire mod.

Do this things and your WR will almost make YZ power.

Share this post


Link to post
Share on other sites

My List for you:

1. read stickies at top of this forum

2. perform free mods to your 426

3. Tune Accelerator pump system using the vast resource of info on this forum

4. jet carburetor for your altitude and temp refer to jetting data base for starting point

5. Very carefully tune your idle mixture for easier starting.

6. service all bearings

7. start thinking about customizing your suspension.

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