Just did it. Strange, the bike was dead, I took out the battery, hooked up the charger, it says its charged. Hooked it back up, and I had juice, started it up, disconnected the battery, still ran, but the light worked like they did last night, real dim, blinkers sputter. I touch the battery and it all comes back. Must of had a bad connection. So yes the bike will run without a battery, but will have very week lights. If the stator was not functioning, thus not producing juice, I'm sure the bike would die wouldn't it?