1100 shaft rear rim help

Hello guys, I need help from those who have swap the rear wheels on a 1100 shaft.

I have look over the forum and read all topics related to swap the rear shaft rim. What I found is the best option is to swap the rim from 1000st.

KZ1100 A2: 16x3.00
KZ1000 ST: 17x2.50

I can confirm the rear rim from 1000st fit the 1100 shaft, but here is my problem: it seems that I will need to get a new Brake disk that fit the 1000st rim (look like the brake rotors for 1000st and 1300 are the same) and due to that I believe I need to get a new brake caliper/assy,

question for anyone who is using the 1000st rim on 1100A2, what brake caliper/assy did you use? or is there a way to modify the 1100A2 rear brake?