Repositioned gas tank to top of bike and installed new carb. I dont have the air cleaner filter or cover installed, just the black body of the filter housing. Gas is leaking out of choke port into black air filter body. Why is this happening?? Have replaced all carb and air filter seals. Is it simply a matter of not having filter element and filter cover installed. Seems strange that fuel would leak into air filter when bike isnt running. Help!!