you have to check length & diameter of forks to see if they'll fit your triple tree without messing up ride height. Also, compare the bottom of both sets to consider how wheel & calipers will fit. I don't know anything about cbr's - is your speedo cable driven off the front wheel? For a track bike, maybe it doesn't matter. Think carefully about all attachments. Maybe all this is overkill but it beats having to relist a set because they wouldn't work.
I went to a dealer and took measurements of a similar model I was about to use as donor.
For updating front ends on old bikes (20+ yrs) it definitely best to aquire the WHOLE front end: forks, triples, wheel, fender, calipers, rotors, clipons, etc so's to limit the amount of fabrication.