2001 YZ 426 jetting help

bike fires up fairly easily(i can get it going in a couple of hard kicks) has good snap, but pops alot and the idle hangs when I let off the throttle. i put all jetting back to stock because the previous owner rode in colorado(much higher than phoenix) header glows crazy red(probably not a big deal) i just installed an R&D powerbowl 2 with the new AP linkage spring and a full carb rebuild. ap squirt is good, adjustable leak jet set to about 55, just want to get rid of this pop/backfire.

thanks for any help

Check out it "carburetor" section in this thread http://www.thumpertalk.com/forum/showthread.php?t=447989

Read "Backfire on Decel", "how to adjust the pilot", and "How to confirm the pilot setting". Your symptoms indicate lean idle and possibly tight intake valves.

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