Pirelli's website (after you maneuver through their weak *** website) recommends the Diablo Strada for the FJR. While I have run a sportbike tire on my FJR (currently have a Battleaxe BT014 on it) I don't recommend it. Now I'm not saying your bike is going to slide out of control, or that its gonna explode after you drop the bike of the center stand, but its not something I would do if I had a choice.
The only reason I'm doing this is because I was between a rock and a hard place 800 miles from home with a rear that was getting ready to show air. The tire is probably going to be coming off this weekend.
If your buddy doesn’t need them, or want them, let me know. I've got a CBR954 that I could use them on. That's actually where my slightly used BT014 rear is going when I wear out the rear that's currently on the bike.