I recently lifted gas tank up looking for a slow antifreeze leak. After finding it and replacing tank and fairings it sat for the night. Today I took it to get gas and rode around until it had about a quarter tank left. I parked it in the garage and then came back to it a half hour later. I notice a slow drip of gas coming out of the drain tube located Of to the side of the tank. Any suggestions on what may cause this? It's obviously not just overflow from fueling.