I can't remember if they applied for a patent, or they got the patent, but IIRC Honda designed an infinite gearbox. I saw the design and it gave you any gearing you wanted between preset max-high and max-low gears. I don't know if they used it at all, but I know they went to a derailleur in a box at some point.
Tomac is the last brand i thought would have worked with Honda/Showa.
Joel is on this forum sometimes. Maybe he will provide some facts to this questionable project.
Maybe this picture makes more sense now.