I had something really unusual for me happen this weekend on my usually reliable '06-650 vstrom. I went for about an hour ride (started right up in the garage) and after I stopped for a break the battery was dead. It had enough power to act like it was going to start but then as soon as the starter button was hit it would just click and everything would shut off. I was able to jump start it and it started right up, but here's the part I wasn't expecting.. The first probably 5 miles the gauges were freaking out, going from 0 to max and back, along with the gas and temp gauges flickering on and off and so was the FI light. It died about 4 times and restarted by just rolling along. After about 5 miles everything was back to normal with the way it was running.. When I got home I immediately tried start it and the battery was dead. (at least I think it was) so I hooked it up to the battery tender and it charged up fine over the next few hours. My question is, where would be the most likely place to start figuring out what's wrong with it? Regulator/Rectifier maybe?
Keep the shiny side up.