I am restoring this bike and wondering: how can I see if the set up is positive or negative ground?
If you have a battery connect it positive to earth and switch on the lights and see which way the ammeter needle goes, it should show a discharge. If showing a charge then it's neg earth. Don't try this if it has a modern electronic reg. If it has the regulator will tell you which polarity it is. If it is a mechanical regulator this doesn't care which way it is earthed. If you want to keep positive earth and it is a mechanical regulator after connecting the battery just flash the F terminal to the live on the battery and this will re- polarise the dynamo. I would go to negative earth then you can easily source led bulbs to help the dynamo.
:) :) :) :)
God that takes me back. Its a lifetime since I heard anyone talking of "flashing" the electrics to change polarity.
Mike 8) 8) 8) 8)
Thanks a lot, guys :D