I recently removed the fuel tank and coolant reservoir to remove and check my spark plugs. I managed to do everything right... hopefully. My only concern is that there's a long hose/tube going from the top of the coolant reservoir to... I don't know. That's the problem. It's not the hose/tube going to the cap. It's the really long one. Is it supposed to be connected to anything? If so, where? Or is it just a vent hose? Thanks in advance.