**** Ahoey I'm still 6 volt and lucky I have no problems. Was going to go the Alt. but don't drive it much and don't need headlights.
Got extra parts if ya need something let me know.
I'll see if I can find some answer in my books.
Doing a little research found a company that make a geared 12v starter called powerlite but they are in England can’t seem to find a dealer in canada