I have a 2003 Burgman 650, and after it sitting over winter, I put a charger on it and went to start it up. It cranks, but no fire. I have spark, but no fuel pressure. The fuel pump is new. I do know that I need a battery, as it does not hold a charge. I did all of this while it was on the charger. Can a weak battery like this cause not enough juice to flow to the fuel pump relay to close it and send power to the fuel pump?