Good luck Keester! I too have a warhead (the true EVO) and I have come to realize that the super tiger likes to run hot. I have sealed the entire engine, new o-rings for the carb, and replaced the fuel line... no change. Mine also runs around 320 - 345. I've decided to just let it happen, now matter how lean or rich, I have probs. I've read a lot about it and tried all the tricks I have read about. I'm just waiting for it to blow then replace with a OS .30. I'm stuck too, don't really know where else to turn at this point. Good luck.