i took care of the gas line problem, took some bb's and gas and cleaned out my tank, and now the gas is free flowing... but it still won't start. the engine turns over when i peddle start it but when i try to give it gas it just dies. anyone know what might be the problem now? i dont know if the 78 pa50I has one of those petcocks (i'm not sure what they are) but maybe it could be that? lemme know what you think, thanks alot guys.