Well at the risk of sending Monkey into a coma, I've fitted the capilers of an SP1/2 mated to a GSXR750 radial master cylinder and find it hard to hold on when braking.
I think the CBR/SP1/RC51 calipers are the way to go if you have an MC28 as they are cheap as chips and fit with no bother....might as well up grade the m/cylinder whilst your at it
The brakes are now so good that I found the back end would easily lift off the ground as the front starts to drift diving up the inside of Valentino......oh. no, no it wasn't, that was all a dream it was just me trying to race that courier this morning!