Welcome to the world of owning a VT1100c. The charging system on this bike, IMO, is it's odd weak spot. I've had my total wiring system checked, cleaned and greased, and it can still be a problem. The R/R was checked, and was fine. I replaced the stator and some connections, and it's still not completely "normal" IMO. I've found out that mine doesn't like cold weather at all. If the temp is below 45-50 degrees, and if you try to start it, and it doesn't crank within 10-15 seconds, it'll kill the battery. I have a volt meter on mine, and it tends to, for some reason, charge the "best" at idle, once it smooths out. To make it easier to crank when it is cold, I'm using hotter plugs, and thinner oil. Good luck, it's a great bike, but not so much a cold weather bike.