You need a carb rebuild I bet, your slide is most likely worn out like most are. Look at the slide from the filter side of the carb, if the blacks worn off it needs replacing. It will cause an idle issue, also the needle jet and or needle itself can get worn. I'm not talking about the needle and seat, but the needle jet. That and your main is probably a little lean. Your needle clip shouldn't be a clip or 2 more than the the middle position, if it is it has the wrong needle if everything else is tuned right. Your best bet send it to MotorGeek for a 41.5 bore and a rebuild.