A friend gave me his Goped to repair. I have had good luck with 4stroke motorcycle engines. This has a RC230 engine Wellbro carb. It was very hard to start. Only would run about 20 sec. at high RPM. So far I rebuilt the carb, All new bearings, seals, gaskets, Piston ring, Head gasket, Lots of nice blue spark at the plug. But will not fire at all. New gas lines and filter. Tried spraying carb cleaner in the carb, No fire. I'm out of ideas. Can anyone help Thanks Mike