Looks snotty
Try running a 190 or better 180 on rear. Also EBC 'HH' pads with steel braided lines should help. All in all, mate.
I'm using the size recommended by the manufacturer, which means 120/70 on front and 190/50 on rear. Both BT-023 sport-touring and the bike is very agile and really likes twisties.
Braking pads are now from Carbone Lorraine sintered metal and they're bit better than the original one from Tokico. Some people recommended me softer pads to improve the braking power. My bike is now four years old so the original braking hoses needs to be replaced and I want to use the steel armoured ones to prevent fading.
The problem is on my side, because I have still bad sense for speed and weight. Simply applying brakes too hard and too early. I'm quite small and haven't enough strength which is needed for that kind of bike. I also have to improve my visual skills, because sometimes I do many steering corrections which is mistake. Also my body position is not optimal, because most of the time I use my Hayabusa for long distance touring and that doesn't teach you the right things for harder and faster ride. Of course long journey doesn't mean I ride only in a straight line, I really love winding roads with twisties, but I have to ride much more carefull because of other traffic. Brno is great circuit, but also expensive and there is no other possibility where to learn to use all of Hayabusa potencial.
I'm studying the video and also book from Keith Code, probably you'll know Twist of the wrist II. which is totally outstanding and helps me a lot to improve my riding.