TW2007, do you recall which aftermarket company produced the overlay sprockets which had a carrier for the outer overlay? In other words the outer sprocket slipped inboard and locked out of the way, similar to some of the early CT setups. I think someone had this wired back in the '60's and offered it to fit a number of bikes back then. I'd love to get a good look at one again.
My dad had a Honda 55 with the split overlay sprockets and a length of chain in the little tool kit. That poor little bike hauled him and his hunting buddy (both 200-pounders) all over these mountains. You couldn't see the bike beneath them and they looked like two monkeys on a football, but it kept on tickin'
Where did you get your overlay setup?