Hey folks,
I imagine the answer to this question will be "you need a new rotor" but before I bite that bullet, I'd like to get a few more opinions. Anyway, here's the situation:
I just got my 1980 CB650 Custom back it good order (full top-end rebuild, carb restoration & tune, etc.) and I've discovered a weird electrical issue. My battery is brand new, reads ~11.8 V at idle, ~13.5 at 3000 RPM and tops out at ~14.5 at 4500 RPM or above. So, from that, I assumed my charging/regulating system was fine.
But then I stalled out (my fault; I'm a bit of a noob rider) starting uphill and when I tried to restart it my battery was completely dead. After jumping the bike from my girlfriend's car and recharging the battery, everything seems fine again.
I would dismiss it as a fluke, but I also noticed that the yellow-bundle connector between my R/R and wire harness is melted together, and I can't seem to get consistent readings with a multimeter from the yellow leads to ground.
Any idea what might cause this? The PO mentioned he had replaced the R/R once and had it go bad again, but during the rebuild I attributed that to a cracked ignition coil (figuring the short was frying the R/R). But now I'm stumped...