I found a listing for an early speedometer drive if anyone is restoring a very early bike. The seller also has all of the early steering damper parts and the early front hub in other listings.
https://www.ebay.com/itm/Honda-CB77-Spe ... Sw5VtaA0CP
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1965 Honda CP77 — Ulsan Metro City, Rep. Korea
Restored with original parts — Owner: J. Doe