My sons Raptor 50 has been sitting for a few years. Just soaked the carb, jets, etc for 3 days in cleaner. I assembled the carb, quad would not start and is now dumping fuel out of the overflow. Took the carb off again to check the floats / float valve which appeared ok. I removed the spark plug and cranked the engine and gas shot out of the cylinder. Anyone know why the quad is dumping fuel into the cylinder and out of the overflow?