In my opinion, you would be better off finding a set of standard 26 x 1 3/8 wheels from a Raleigh or something similar. Then you would have access to many styles of tires instead of having to source the Schwinn size for the S5/S6 rims.
I have some but there were two types. The early ones had 4 tabs that locked into the welded on housing and the other kind had two tabs. Can you tell me which you need? I also need to know what length as I have multiple sizes.
It is coincidental that you posted this question, because I was clueless about these mopeds until last week when someone brought me one to see if I could fix their flat tire. I fixed the tire and they asked if I could figure out how to make it pedal easier. I discovered the release lever had...
They are from a Honda moped. The belt drive is for the engine and when you disengage it with the lever, you can pedal the moped like a bicycle which is the chain side.
Mine is my avatar. It was a 1949 Chevy. I gave the guy $25 cash and had to shovel his sidewalk all winter. It had been broadsided on the passenger side so I had to replace the front door and fender which cost me $5 each at the salvage yard. I then rattle canned it with 12 cans of blue paint.