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I have a strange issue that I'm not sure is related to the R/R. While trying to diagnose an intermittent temperature issue, I'd left the bike idling outside my garage for about 25-30 minutes. All of a sudden, the bike stalled. When I tried to restart it, I noticed that the dashboard clock had reset to 1am. When I tried to crank the motor, there wasn't enough juice to do so.
I store the bike inside during winters, and I typically have a Battery Tender hooked up to it. The battery is a Yuasa, but I'm not sure how old it is. It may well be original to the bike.
The funny thing is that, after the idling issue, I put the battery on a Tender. And today when I went to start it up, it started fine.
With my multimeter, this is what I could see:
Ignition off: ~12.3V
Ignition on: ~11.6V
Motor running: ~14.5V
Could this be an R/R issue, or is it likely to be something else? Charging issues are common on these bikes, so I just installed a VFRness in an effort to shore things up. With the ignition off, the battery (fully charged) voltage was about 12.5V. With the bike running and idling, the battery was about 14.3V.
However...
Once I brought the bike up to about 5000rpm, the voltage dropped to about 12.3V. Letting it go down to idle again, the voltage dropped further to 11.8V and kept dropping.
Do I have a bad battery or bad R/R?