Question about carburetor drain and overflow
I have gas leaking from the drain hose (bottom of the carb) when the bike is off. I have cleaned the carb, and replaced the float and float valve. I'm thinking the issue is the valve seat. I will be polishing that next.
I am not clear on the carb overflow mechanism. It appears to me that the carb is filling up and overflowing through the brass tube in the carb bowl, then draining out the bottom hose. However, most of the information I can find on this forum is telling me that in an overflow situation, fuel will leak from from the upper hose (I have seen it referred to as both the overflow tube and vent tube). I am reading that the bottom hose is for draining only. If that is the case, what is the brass tube inside the float bowl? Where will fuel leak from in an overflow situation? Can someone help me understand this?