id say tighten your clutch screws but the fact that it runs fine sounds carb tuning to me.
whats your plug chops saying?
Have ya tried just running around with the thing at 3/4 throttle then checking the plug? Maybe the needle is too high?
OR maybe the kits just not even close to broken in yet, and the compression ratio is all over the place and your trying to tune to a moving target? Thats what i always find when i try tuning too much right off that bat. Run it rich and put 100 miles on it?