I just bought an old cbr250r Mc19 to ride to work. It was not starting having just ridden it home from buying it. It came down to the fuel and I disconnected the fuel pump and just plugged the pipe direct to tank, the bike now goes fine. Do I need the fuel pump at all? What could go wrong with just the lines plugged in? I ride 2 strokes so know little about this shizzle. Anyone?