you should try on a cbr forum... what exactly are you trying to do tho... put RR forks on F4i tripples and wheel.... if it does work (which i doubt that it does perfectly) you're prob gonna need a rr fender... and possibly calipers and rotors (if the calipers arent the same) ....

BTW idk exactly what im talking about.. im just looking at pics of 02 f4i and RR fornt ends...

im almost certain that the fenders aren't interchageable.. other than that it "looks" pretty straight forward...

if anything just get F4i forks on ebay.. shouldn't be more than 100-150...
OR... swap a set of newer USD RR forks on your F4i ... for that you'll need the whole front end... and that includes tripples, axle, wheels, rotors, calipers, clip ons, maybe swap your stem or put in a diff stem bearing on your bike maybe cotrols and brake lines... and of course, a fender.. (pretty much a WHOLE front end)

anyways, i would check better on a honda forum.. they'll be able to tell you... if i was you and was trying to do the easiest thing possible. i would sell those forlks on ebay and buy the correct ones.. that was you dont even have to run into finding a fender from a RR