@dave bushell wrote:
My friend owns the penultimate Birmingham Scott first registered in 1972 and that has a 6v system. Also, advertising literature for the Brum states that it is equipped With a 6v system. I know many owners have gone down the 12v route but I have found that the 6v system can produce very good lights providing you have a good earthing system and use heavy duty wiring for the main runs.
I have the original type 6v system with new wiring and it does very well, however it will pop light bulbs if I’m not careful. Pos earth 6volt diodes are kind of hard to find 😯
Probably should have gone with 12v regulated,but I wanted the bike work as it was intended with all the quirks and the correct 6 position Miller switch ,I guess.