I've been struggling with my 6v system on my 1974 (yes, the odd wiring).
I seem to keep having to re-charge the (new) battery even though I have a regulator/rectifier that outputs +6V.
As I'm trying other options I wonder; is there a way to bypass the battery and run it all of the 6V DC output from the regulator/rectifier?
I realise that if I get it working the lights will be dimmer, but the regulator should protect them from blowing.
As I understand it the lights are running of the battery at present, but some other things are off the rectifier.
Diagram below, only change is that I have removed all the indicators.