One thing to remember about the times these stock parts and systems were used, the factory recommendations for fork "oils" weren't fork oils, but, 4 stroke motor oils. For the times, that worked OK, but, we really didn't know any better. When the sophisticated fork oils came along in the mid-1970's, they were far past helping a system that really didn't work that great in the first place.
This is why I still use straight weight 4 stroke motor oils in stock and lightly modified front forks, and not specialty fork oils.
On my street hot rod H2, I used Z1 dampeners, different holes in the dampers, different feel, better, but, still scary in a fast turn. Emulators should be so much better, it won't be funny, the changes.
We also didn't have Progressive fork springs back then, either, it was modify the top spacer, or, different stock springs, modified to work. Another thing to remember is, with a straight wound fork spring, shortening it increases the spring pressure, a progressive spring usually has one closed wound end, which can be shortened without changing the spring rate, and the open wound end, which does when cut.
Front ends are so much better these days.
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