Not quite on topic but I have always noticed that there are few interchangeable parts on earlier Hondas versus a brand like Suzuki. The explanation I was given is that it was a mark of honor to design parts for motorcycles and each Honda engineer/designer left their imprint on the parts they designed by having them specific to a particular model. Supposedly that's why parts are interchangeable between odd models (points on a CB450 working on an early Goldwing for example) and not on other bikes that would seem more likely. Of course that could be complete BS and the real reason is Honda had the cash flow to have a large parts inventory where Suzuki had to be more frugal and use generic parts across several model lines. This seems likely as Suzuki started to shed some of their interchangeable parts as their sales grew with the 4 stroke GS series bikes......