Sounds like a piece of debris from the tank was preventing one or more float valve needles from seating all the way, would cause the bike to run like shit and die from too much gas. Will the motor turn if you put the bike in gear and roll it? Could be the gas has filled a cylider up and you've got compression lock. Smell the oil, does it smell like gas? If so change. Could be your battery is low, put it on a charger.