Originally Posted by Klxster

If you have a DJ128 main jet and a DJ needle, your carb is probably set up with standard DJ stage 2 and your best airbox config would be lid on without the snorkel. Be sure your needle clip is on 3N (3rd notch down from top - the top is the end where the clip notches are..) AND that both needle washers are on top of the clip.

I have posted pics and measurements of the DN0228 and DN0352 needles from both DJ kits usable on the KLX250. You will need to identify your needle. Search and research of our forum threads is a skill you'll need to develop.

Once you have a properly running/operating carb, and no further troubleshooting is needed, you can choose to explore the higher performing "lidless" carb setups we've developed/dyno charted/verified in here..