Its all in the radius below the groove that holds the boots on, ie the curve of the forkleg, where the fatter seal area changes to smaller diameter.
The KO will have the right ones, as does ONE other Honda model.. I had a set and sold them to a buddy for 50 bux, sorta regret that nOW.
The earlier the sandcast, the MORE DIFFERENT..
I researched mine extensively .. without a partsbook or very accurate sandcast guidebook it is hard to tell what a bike should have.
The bike I had was in the 500 number range, and I found about 50, yes 50 parts that were on it but not on the last sandcasts.. and earlier have even more differences!
Its the stuff thats missing, that will cost and kill your wallet..
You can find a 69 or 70 easily that is missing 4K or more in parts.... just the way it is..
If you are dilligent, actually are willing to search and are clever at it, it gets sorta doable..
No shortage of MISDESCRIBED ?sandcast? parts out there.
Those forks BTW, I can tell by 20 feet away if the bike is clean..