After 3 batteries (maybe 4, I forget) on my '03 1300S, 2 different dealers telling me that charging system was fine, too many late nite jumps (done correctly, thanks Hondas Rider Club), I finally went to an independent repair shop that specializes in metrics.
After I described the bikes symtoms and history, he tested and diagnosed a faulty stator It seems the two 50 watt bulbs I had in by lightbar two or three years ago probably caused the damage. I only have one 50 watt bulb installed now.
I can buy off on that, I just have a problem with the $517 estimate to replace it. I've done my own maintenance on the bike, things like brakes, oil changes, Progressive springs, wheel removal, ect.
I've found the part online for $220 delivered, I've got the service manual, plenty of tools and a lift. Doesn't seem to difficult. I'm sure others on the site have done it. Any tips? By the way the bike has 35k miles, all me.