I have a 1980 murray moped with a 1.5hp puch one speed engine. I feel that I have done everything that I could to make this ped start. I got a new piston and rings from the moped warehouse and instaled them perfectly. I cleaned the carb and the gas tank which does have a little rust. The bike Has a very good spark. Gas is getting into the carb bowl. I have the bike turned on! I dont know what else there is to do. I even sprayed starter fluid into the carb and it would not even spudder. Could it be bad gas? Please any suggestions would help.