Looking at a parts breakdown for 1982 Honda Urban Express NU50.
Part of interest is part number 24 in this diagram. You can get a better look at the parts diagram on Bike Bandit:
OEM Honda part number: 90453-197-000
Obviously not available like anywhere.
So, its labeled as a "washer, 10mm", and I can verify the shaft that would pass thru it is indeed 10mm, but in the diagram it looks more like a "stepped" or "shouldered" spacer than a plain washer.
If anyone has one, I'd love to buy it. If you have one, but is not for sale, or have an NU50 kickstart assembly you wouldn't mind tearing down... honestly I wouldn't mind machining one if that's what has to happen, but I can't really do that until I know what the dimensions are. Any help on this?
Or, if you have an Urban Express parts bike or complete kickstart assembly, that could be helpful too. Please message to email@example.com