i have a 98 700xc it is getting fuel into crankcase and shutting down the fuel pump. it will run for a couple minutes the die. i have drained crankcase and got the same result. what would cause fuel to get into the case? What is the best wat to check floats to make sure they are ok? How can you tell if the needle is seating properly? If I have a reed not closing properly what kind of problems will that cause?