Thanks, all. It's a relatively new battery and the bike sits on a Battery Tender trickle charger much of the time. A week is plenty of time to drain the battery.
Boon Booni, I've got both the positive and negative cables running directly to the battery. Are you saying to unhook the positive cable from the block and put the multimeter between them so that the power runs through the multimeter?
Helmets save lives. Loud pipes annoy voters.