Will just run industrial chain of some sort.
I cant see where the front sprocket is.
You might get away with 428 motorbike sprockets. Pit bike stuff is cheap. (id buy a good DID chain though) If both can go one way, have to get the old sprockets machined down and drilled and bolt the new sprockets to one side. So the old sprocket becomes a hub.
Well actually if you know how to use measuring gear you could drill them yourself and machine them up with an oxy or grinder. Its not like they would be spinning fast enough to need good ballance.
Does not have to be the same tooth count, just the same ratio. Smaller sprocket divided by the bigger one.
Usually something like 1 tooth bigger on the small sprocket is the same as 4 teeth smaller on the bigger one. Obviosuly the closer to the same size sprocket the less this would apply. But for a 10-15 front and a 40-50 rear its roughly right.
Bob.
