Jetting on a CA XR250 with Gordon Mods

I'm on a 2001 with more or less most of the Gordon Mods - snorkel removed, iridium plug, Supertrap IDS2 Quite cor exhaust, Uni filter. I stepped up to a 125 main (122 stock in CA) and still the bike appears to run lean. Plug is just a little white and I get popping when rolling off the throttle. I have gone through the exaughst and found no leaks. The slow jet is still stock and I have adjusted the mixture. Bike more or less runs flawless, but I want to get rid of the popping. Where to go on the jets? Ride mostly at about 2,000' in Southern California. Thanks for the input!! TT rocks.

Try this: 38pilot and 135main.

That's what i run in my Keihin carb. :):D

Better yet try 45 pilot, 135 main.

This bike will run pretty good with crappy jetting, but get it right and she'll really perform and give peace of mind also.

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