Carrozzeria underslung brake caliper bracket. 84mm calipers will work. looks like this one, but for Suzuki http://www.superbikeunlimited.com/p..._color-silver/stompgrip_bikes-09_15_gsx_r1000 $100 shipped on the bracket. I don't have the 84mm caliper for it.
fits the stock OEM wheels ... this link I think it is http://www.motorcycletoystore.com/s...r-relocator-suzuki-gsxr1000-2007-/p_3079.html