Re: Chain keeps breaking?
There are a couple of things to try first. Can you flip the sprocket? Will it dish in towards the spokes, or is it already that way?
Also, you can, if you have the ability, dish the wheel with the spokes a little and it may be enough.
Possibly, remove the rag joint from between the spokes and the sprocket, and substitute a piece of heavy rubber or leather, just much thinner.
It's pretty hard to "move the engine over".