Charging system troubleshooting v650
Ok guys, I rode about a hundred miles the other and came in to work. When I left work the battery was too low to start the bike and I'm too fat to push start it.
I towed it home and started poking around a little. Battery voltage was about 11.5 key off, falling to 10.6 as soon as I turned on the key. Now the battery is only about 14 months old and I keep a tender on it when I'm not riding so I suspect that is not really the root cause of the problem. I charged the battery until my tender said it was fully charged and checked the voltage again.
I had about 12.6v with the key off. Turning the key on dropped it to about 12.2v. I started it up and checked voltage again. At idle I had just under 12.3 volts. Giving it a little bit of throttle it did raise some, but only just, getting up to all of 12.5v.
I would have expected 13+. Obviously I've got a charging problem, the question is where? The bike is a 2004 with 44k miles on it. I will of course double check all of my connections to make sure they are clean and corrosion free. Beyond that my first suspect is the stator. I certainly don't mind to replace it, but I would like to be able to definitively prove that the stator is bad first.