My 06 bonnie is still on the same battery. the only starting problems I have had is once, when I discovered the parking light position on the ignition switch, and when the igniter quit. the efi bikes have a different problem, one in the program that will nt allow the starter to run even if the battery is good. My sons thruxton had that problem, and put in a bypass switch, search for the starting problem, I think it was Forchetto that describes how to do that. Dan was worried about riding to work and not being able to start, since he coldnt use a battery tender there.
2006 Bonnie Black
1980 Yamaha xs650 sold 4-30-2011