I have a 1999 CBR 600 that will not start. I have traced it to the fuel pump not supplying fuel when turning the bike over. I can jump the pump and it works and supplies fuel and then the bike will run but only runs until fuel gets low in the tank. I have replaced the fuel relay and that did not work or seem to help. I can feel and hear the pump when the key is turned on for a second and then nothing after that or when hitting the starter button. I'm out of ideas and would appreciate any kind of help.