One thing I've never liked about the electric pump is the need to use a fuel pressure regulator to split the fuel delivery. If you look at the mech pump and the Mikuni, there are two fuel outlets and one fuel inlet on the pump, because the pressure regulator is built into the pump, and the excess flow goes out one of the fuel outlets, and the regulated flow goes to the the mikuni float bowl inlet. The excess flow goes to the fuel return line to the tank by way of a second fuel inlet on the mikuni, which feeds the aux. accel pump well and I think the accel pump well, and the excess flow from there goes out of the mikuni to the fuel return line. This means you have to mount the regulator near/at the carb to match the old fuel pump pipe layout. I think we've seen some cases of pump pressure flooding the carb with an energetic electric pump and no regulator. It's possible to blow the needle valve off it's seat, overcoming float force and return spring pressure with fuel pressure.