It seems to me that we have many people with melody ignition system that trusted the sweat house builders idea of static timing. The guy whose engine would not idel but would put out 8500 rpm. Your timing was probably at about 60 degrees before top dead center. All of my SPE engines were off from the factory. If it kicks back when you are trying to start it hot. Check your timing with a timing wheel. My last SPE 40 cc was set at 67 degrees btdc. It should have been at about 30. Before you guys go to "hammering" these ignition systems, give them to me. I will set the timing properly and use them on some of my old mag engines.