Voltage at Battery
Bike has been on battery tender for months. Recently have been starting bike to keep everything flowing. Checking battery with meter noticed voltage at startup would slowly rise to 16-17-18 volts in slow increments. Turning on head, turn, brake lights the meter did not move. Then it would fall back to 14-15v. Hooked up a temporary voltmeter (why is this not standard issue on mc?) Restart bike, volt dips to 10v comes immediately 12v then to 13v and almost like heartbeat, rises and falls to 14v then settle in at 13v at idle.
It's the 17-18v and the inconsistency that has me worried. This is all at idle or easy run-up on throttle. Haven't been on the road in a while and getting itchy but don't want to venture very far without confidence in the bike to bring me back.
About two years ago put in a new stator and rectifer. Stator was toast and made a horrifying sound. That sound is not present this time.
Any electrical wizards have any ideas.
Oh, it's '08 900LT about ready to turn 50K.