No charging voltage to battery

[Redleg]

Figured out why my old battery crapped out on my saturday ride with BigTOE, no current to charge the battery.

After talking to a co-worker (and fellow rider) about what happened, he suggested that I break out the multimeter and make sure that there was a charge going to the battery.

Figured it should test ok, since I just had the voltage regulator replaced earlier this month. WRONG!!!

Battery before starting the bike - 12.9 V
Bike running at 3600 RPM - 3.4 V
After disconnecting - 3.4 V

I really hope it's the new Volt Reg that's failed and not the alternator. Really can't afford any new problems right now.

Thoughts, suggestions, words of encouragement?

[Berserker]

You can unplug the ac connector from the stator. An electrical serice manual will say how many AC volts per RPM, you should be reading. Somewhere around 05ish they went to 3 phase.

Bike should read about 14.4vdc at the battery when revving. About 12.7 when the bike is off.

[Redleg]

Thanks Zerk. Will try disconnecting and measuring at the alternator connector to the regulator tomorrow after work.

[Berserker]

Don't touch your probes together with bike running. Its be a couple years since I did this. The stator side is probably female, so as not to have exposed hot pins.