we just confirmed today that if you need to derestrict the FZ6R, it's a simple procedure of bending back the limiter (stop) plate at the end of the throttle cable. You can re-restrict it by bending back. A nice and simple thing, luckily. Not 100% certain that there are no other limiters in place (eg throttle bodies) but this will at least give you more than 1cm of throttle movement.