You should not run it full lean for long for a couple of reasons. It will get very hot and sieze, and it will not run during flight. It will quit running, probably at the least opportune time. So, follow jetmech's advice and run it slightly rich. If when flying, it sounds like it is going into four-stroke, not going to full RPM, land it and lean it out very slightly, only a couple of clicks and try it again.

And, follow Allan's and Jetmech's advice and get some help.

CGr