Hey I am new and don't know where to start. I basically rebuilt a 89 or 90 big boss 4x6 250 and got to ride it the first time today. I have a carb that I cannot get to idle slow. The machine runs good but I have to turn it off to change gears because the clutch is turning to much. The primary is definately disengaging all of the way too. The thumb screw doesn't do anything, engine warm or cold. Also after sitting for about 5 minutes it needs a shot of carb cleaner to get it started again. I am thinking it could be the clip on the needle, but when I rebuilt it I matched the notches up with the old one. The bike has sat for about ten years and I also had to change out exhausts to keep it from popping and blowing the J tube and muffler apart at the springs. It runs good wide open with no hesitations, smokes enough to let me know it is getting oil and sounds pretty cool. I am new to ATV's and not a mechanic but I can get by with what I have usually, any thoughts??