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26 volts was measured at the leads disconnected from the rectifier at about half throttle. It drops to 20 volts at idle. I also measured at the leads up at the rectifier (with them disconnect from the rectifier) to ensure there was not a loss in the line. With everything hooked back together and...

If the dynamo is putting out 26 volts AC, is that sufficient? I hate to pull that if i don't have to. Do I need to set the polarity on the system? I've read a lot of information, but so much is inconsistent. I even read that you have to turn on the headlights to get the battery will charge...

I have an older B7100, probably a mid 70's model that will not charge the battery. I read that the dynamo should put out 40 volts AC. My dynamo puts out 26 volts AC. The regulator shows 12.5 volts DC from the red wire to the ground on the battery. I've heard that the dynamo can get dirty. Is it...