Motorcycle Electrical Systems

1975 Honda XL250 Motorcycle Headlight power problem?
The headlight on this bike is powered directly from the alternator. The power does not go through the regulator or rectifier that control the battery charging system and the other lights. I am looking for anyone who knows what ac voltage and current the alternator can be expected to output at a given rpm. I am measuring values up to abour 20 Vac at 5,000 rpm on the high beam circuit. The low beam circuit measures less because of the resistor in the circuit. The bike has a 6 V battery. According to the tests in the Clymer manual, the rectifier and the regulator are in good working order. Does anybody have any knowledge of this electrical system?
Thanks!
I believe it is wired wrong.Run a hot wire after the rectifier to the head light switch and then try it.The head light elements may be burned out.Check them with a continuity meter.I believe the head light is designed to run on 6v dc not ac.Have a blessed day.
Trail Tech Stator Installation – KTM S-8313 100W DC Electrical System
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