HI, I WAS WONDERING IF ANY OF YOU NICE PEOPLE COULD GIVE A ROOKIE MECHANIC SOME ADVICE? I HAVEA 1978 PUCH MAXI 2HP. ITS BEEN SITTING SINCE 1982. ( MINT COND. 560 ORIGINAL MILES.) IT STARTS RIGHT UP, ANDS THEN WILL BOG AND DIE. I HAVE CLEANED CARB, FUEL VALVE, AND GAS TANK TWICE.IM AT A LOSS AS TO WHAT TO DO NEXT. ANY AND ALL ADVICE IS GRATFUL. THANK YOU.