Today, I broke it.
Second real day of riding this season, I was out tooling around rural Minnesota, when I noticed that when I hit the brakes, the battery light came on, and the tach dropped to zero (engine still turning of course) When I let go of the brakes, the dials came back up and the battery light turned off. The battery is fairly new, but I'll have to pull it tonight to check it out.
When I stopped at my destination to look around, the bike wouldn't start. wouldn't turn over. Really sounds like a battery. I had to pop the clutch to start it. thank god It was still warm, or I would never have started it.