So I charged the battery. It reads 13.33V at full charge. Seems normal.
I also check out the BLK wire to 12V ignition, pulled it off the connector, checked good for continuity, and plugged it back in.
Started the bike up on the first kick and have the following readings:
Idle 1000rpm = seemed to drop to 11.4V then blipped the throttle to see quickly rise to 12.5V then back down to 11.4V...
Rev'd up to 2-3000rpm = reached a steady 12.3V
Dropped it back down to idle (accidentally lost grip) and the voltage seemed to also drop quite dramatically to about 11.4V (bike was also still cold)
4-5000rpm brought it gradually back up to 14.4V~ and then I decided to get the bike out for a steady ride on the freeway, keeping a steady 5000rpm for several minutes and it maintained a steady 15.3V
All charging systems seem normal as once before. Maybe the recharge did something to reset the battery, or perhaps the BLK line wasn't connected properly. Before the test I did also jiggle around the r/r harness and respective BLK and W connectors so maybe that did it?
But now, after the ride and all that charging, with a short rest and the bike OFF, I turn the ignition on and meter the batt = 16.4V
Too high? Dangerous?