Sounds like your gauge is off a little, looks like you still have about 3 gallons in it when it reads E. But, you really don't want to run it all the way to empty anyway. You probably want to keep no less than 1/4 tank in it, cause when you get on it, (and everyone gets on it) the fuel will slosh to the back, away from the fuel pump, and you will basically sputter as you run out of fuel, and this is not good for it if you're really into a lot of boost.