Don't mean to thread jack , but I'm having an issue as well maybe you can help me with. I jetted my stock carb 2 years ago using the jd jet kit. Blue needle clip at 4th notch, 160 jet. I have never had an issue until recently when at wide open throttle heavy load. Every time it was extremely windy and I was going against it (heavy load). Fuel screw is set 2.5 turns out .
2009 sm, 3x3 , mrdssw with quiet baffle and spark arrestor, jd jet kit with above specs. Live in northern va at around 300ft elevation. All occurrences happened in heavy wind, under 50 degrees temp wise. Bike had been running for 10-15 min plus to give you an idea on temp. Only happens in 4th or 5th gear heavy throttle. Feels like it starts running really really lean all of a sudden. No leaks , carb was cleaned already so don't think it's that. Spark plug looks ok.. it is original though. I really feel like it's starving for fuel when it happens . Popping bogging until I release throttle and slow down . Help!