Originally Posted by Kerfuffle
That happens to me on occasion when the bike has been sitting for a week. Doesn't happen after the first start. Doesn't matter if I use the battery charger, so I suspect its the battery itself.
It is a known issue, that the stock R/R is not charging the battery with high enough voltage. The battery will sulfate over time, and die a slow death. Your symptoms are in line with that, but most likely caused by a low charging R/R. You put a new battery in there, and it will happen again. How long time..... no body knows. Have a look here..