Got a 91 Honduh XR250L with a punched out bore, white bros exhaust system, K&N and a mikuni 32mm flat slide carb.
When I got it, the carb was hillbilly connected to the intake with a piece of tire innertube and a XR400 air tube.
I sent the carb to XRSONLY in California to add an air box adapter causing me to have to buy an XR250 air box tube and they found the jets to be way big.
I believe the jet now is 145
Problem is, when at cruising speed, say half throttle, it stumbles
Called XRSONLY who said I need to raise the needle 1 spot. Let in more air. Did that. Still stumbles at half throttle.
Do I go the other way? Is it a air/fuel screw adjustment issue?
What's my next move?