Got the first customer bike fixed. New steel rim, chain, and roller. Not sure if the roller hardware is going to hold up, but it's a very smooth free unit. Hard to find the right shoulder bolt for it to work properly. The one I have is a bit small. It uses a spacer. The correct size shoulder bolt would be much stronger. We shall see if it holds up.
I'll say one thing, this old 49cc workhorse is a very sweet tempered engine. It has a very nice mellow tone and generally runs like a sewing machine. The engine never misses a lick, mile after mile.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.