Scott, yes, there is a shelf or stop for the bearing. Thus the change in diameter of the hole from 40 to 44. Guess the bearing is a 44 and press fit instead of 43 as I was thinking...need to be slip free...wasn't thinking about it when posting previously.
I don't know if the CBR600 F3 rotor and FZ6 or R6 rotors are the same dish and size, I just went with FunJimmy's recommendations as the front end I picked up was not loaded with everything and mine was missing the top triple tree which I replaced with the FZ6 triple (setup for handlebars) and later think because of the finish on the fork lowers (black) they are R6 forks instead of FZ6 as every FZ6 model/year I looked at after they upgraded the forks to the R6 earlier design were silver.
I have an extra top triple as the first one I pulled the trigger on didn't have all the bolts and the little plastic caps for the socket head screws on the triple tree's handlebar mounts. Was cheaper to buy another used triple than source new parts from Yamaha.
David