That flat feeling

The VFR is known as a reliable bike with only one major weakness. The Regulator Rectifier. This result in a flat battery or for the battery to boil, depending on what's actually wrong with the RR. Replacement RR's are, allegedly, more reliable than the original fitment on the 1998 bike (there's a definitive article on the Bikers oracle VFR website) and, having had my original replaced a couple of years' ago, I thought I should be ok for a while, yet. So, yesterday morning, I pulled the bike out of the garage and hit the starter. The starter barely turned the bike over. It was fine when I put the bike in the garage a couple of weeks ago. Is this a symptom of the dreaded RR problem? The battery has been flat on a couple of occasions recently - I assumed it was because i'd left the heated grips on or it was causing some sort of drain on the battery but I've removed the fuse so it can't be that. Looks like the battery's given up the host. My multimeter isn't accurate enough to indicate whether the RR's bust, although the reading looks about right (just under 15volts - or amps, I forget which - charge). So, tomorrow, into the workshop for MOT and battery / RR check. The MOT should be no problem as the bike's only done a couple of hundred miles since the major work earlier in the year. I'm just glad this happened now, and not en-route to Germany in three weeks time (more on that later).