I have an 08 electra glide. Only stage 1 mods. Problem is bike starts to run out of fuel at 1/2 tank. I can visually see fuel on the fuel pump side so I know it is not empty. So far I have replaced fuel pump, fuel filter, pressure regulator and check valve/fuel supply line. None of these have helped the problem. If I run it down to 1/2 tank and it starts to miss and sputter, I can pull into a gas station, fill it up and it runs fine again until it gets down to 1/2 tank again. Thanks in advance for any ideas on possible solutions.