For two days the voltage spiked to 14.7-14.8 volts. Didn’t think much about it until it burned out the headlamp. I wouldn’t.t have even known it but for the fact that after the alternator imploded and was replaced I installed a volt gauge and battery monitor, which starting blinking on the high side of double green. The only thing I did out of the ordinary was d-salinate the bike after a week of salty slushy road conditions in NePA. Voltage stabilized at the usual 14.3 - 14.5, replaced the H-4, and all has been good now for two days.