Okay guysH my motorcycle will not keep my battery above 12.5 volts. On a charger it will hold 13.4 volts. But when I turn the bike on, it drops to 12.5 and just slowly keeps falling until there isn't juice left and then the bike dies. I've tried 3 different batteries all with the same result. just got my bike back from the shop and they said all I needed was a new battery and that my charging system was working great. Any ideas??? Also, my head light will just randomly turn off for a half a day, then randomly turn back on. Not sure if that has anything to do with it. Any help would be GREATLY appreciated, as this bike is my daily rider. Right now I'm using a bicycle to go to work.