Maybe someone can point me in the right direction. If I fill the tank up to the point where fuel is in the filler tube(not to the point of overflowing but just inside the tube extending downward from the top of the tank) and then start riding, in a mile or so fuel starts running out underneath the cap. I hav e stopped at this and turned off the engine,opened the cap and fuel continues to come out of the tank as if the tank is pressurized. What can be pressurizing the tank? Any ideas why this is happening . A local mechanic told me this can't happen but I see it ever time I fill the tank if its too full.