I have several sets similar to the one pictured, and two other styles two, including the big one that mounts to the front of the frame on cb550F.
The smaller ones had two problems; 1-they interfered with the stock 4 into 4s I have on the 74 CB550, 2- they get under the toe of my size 10 1/2 boot on the F models they did fit onto. This can interfere with braking and shifting until you reposition your foot. This can be a safety issue.
The big loopy bars on one of my F models, also won't work on the 74. But, that's because it's my winter bike with a full vetter fairing and lowers; interference. Anyway, they had highway footpegs on them when I got it. On a hot day cruise you could put your feet way out front and the wind would blow right up your pants leg. Refreshing... Would have been more comforable with pull backs, though.
Cheers,