Ack that sucks. Had similar with my old KZ440. Would leak gas due to shotty floats, and then it started leaking gas out of the carb bowl. Nothing like riding with wind in your jacket, and gas on your leg. After many many atempts to get gaskets to work, and re surfacing the aluminum, i just permatexed a 'gasket' no leak now. =D But DONT do that with yours, just an anicdote. Check your petcock settings to make sure you weren't in Pri. and perhaps if you were not in Pri and it's still flowing freely would need a petcock rebuild, or a new one. That would help the gas flowing so freely, and probably a bowl over flowing caused all that gas spillage. Do be carful starting it, might be alot of gas in the jugs, don't want to hydro lock.