Is the rich condition throughout the throttle range, or at 1/4 through 3/4, Idle through WOT, 1/8 to 1/4, etc. Some smoking is normal with 2-Strokes, but excessive is rich jetting. To lean up the Pilot Circuit(idle-1/8 throttle) Turn OUT the air screw. If this does not fix the problem, so to a smaller pilot jet. To lean out the Needle Circuit (1/8-3/4 throttle), raise the clip position until you find an optimum setting. To lean out the Main Jet (3/4 to WOT), simply go to a smaller size main jet. I reccomend doing a WOT Plug chop to make sure the main isn't too lean, and listen for a boooooooooowah sound in 1/8 to 3/4 throttle, if you hear it the clip is too high so try lowering it. Adjust the air screw by turning it all the way in and backing it out until RPM peaks(don't turn it out too far though, the revs will stay up but the exhaust will sound dull and lumpy). I hope this helps, if you have any questions, just send me a PM, I'd be glad to help.