Originally Posted by slartidbartfast
You may want to double-check this, but I think the calipers will bolt straight on. The main difference between my 1100 and 1150 calipers is that the 1100's have "Brembo" on them and the 1150's have "BMW"
Nope, different mounting points on the calipers and forks. I have a 04 R1150GSA and a couple R1100GS and no way you can put the 1100 calipers on the GSA and vis versa. If interested I can take picture and measurements of both, let me know.