this 4 wheeler has a rubber hose coming out of the top side of the side where you put in the 10w40 oil for the transmission. Is this a vent tube or does it go somewhere? It is leaking oil out of it so wondering if there is too much oil in there. also, has anyone plugged the oil injection system and just used pre-mixed gas? This 4 wheeler was given to me so trying to get it back on the road for my son.