I don’t see where you got that. The charging circuit you posted has a 6 pin and 4 pin connector. Not a 5 pin. But I see no 5 pin connector anywhere, so I don’t know how you jumped to that conclusion.Because he is using 'number of pins' to describe connections that can only relate to the charging circuit. That has little to do with the ignition circuit which is the CDI part.
I’m curious how you think that was accomplished on these carbureted bikes?That would be a huge fail, rev limiters work by curbing the fuel supply, not by removing the ignition. Thus has it always been..