I HAVE A YAMAHA 1995 PROV 150 LOOSES POWER FROM FUEL STARVATION. HAVE REPLACED EVERYTHING FROM THE FUEL TANK TO THE ENGINE NEW STILL HAVING PROBLEM. IT DOES NOT HAPPEN ALL THE TIME BUT SEEMS AFTER RUNNING FOR AWHILE IT WILL SHUT DOWN HAVE NOTICED THAT THE PRIMERBALL WAS FLAT I CHECKED THE VENT...
