I HAVE A PROBLEM WITH MY TIGER CUB. (KAWASAKI 19 HP FH 601V) WHEN IT GETS HOT IT SHUTS DOWN AND MUST COOL PRIOR TO RESTARTING. NEW COILS HAVE BEEN INSTALLED AND PROBLEM REMAINS. FUEL SYSTEM SEEMS TO BE OK. PLEASE HELP. WHAT HAVE I MISSED ? THANKS IN ADVANCE FOR ANY HELP.