Got the bike out of storage today and took it for a run... Great stufff... came back and parked it in the driveway... Hour and a half later went back out to take it into the city, but noticed a leak on the driveway beneath the bike. This is probably a simple question that I'll smack my forehead after reading the answer... The leak originates from an open-ended tube located inside the frame behind the exhaust... cannot see where it goes once it snakes behind the engine... Anybody know what it's for?