More discussion on overheating. I agree that you have to use the proper air-fuel ratio. Too lean and the piston temperature rises too high. But, you also need to remove heat with adequate airflow over the cylinders. If you don't get enough airflow to cool the cylinders, the piston temperature also rises and bad things will happen. It's really no different than if you drained the radiator in your car and started to drive down the road. Even with the proper fuel mixture, the engine temp would rise quickly, then detonation, then seizure.