FIRST THINGS FIRST,MAKE SURE YOU HAVE GASOLINE IN THE TANK AND NOT DIESEL OR WATER.
IF FUEL IS OK CHECK THE AIR FLOW METER(THE LARGE ALUMINUM DISC UNDER THE AIR CLEANER)IT SHOULD BE NICELY FITTED IN THE BORE BUT NOT TOUCHING OR STUCK.
THE AIR FLOW METER SHOULD OFFER SOME RESISTANCE WHEN BEING DEPRESSED AND SHOULD RETURN TO THE TOP WHEN RELEASED.
MF