| 1/2" M/cyls were used on Steel framed CBR600s that had two calipers each having two pistons and of the sliding type, I always felt they worked well, Early Fireblades also used a 1/2" M/Cyl (there chart is wrong wrt to this one), in this case it was of the remote reservoir type and was connected to two calipers each with 4 pistons. The brakes on these early Blades I always found a beed weedy and upgraded mine to 5/8" (15mm ish) which did improve things.
When racing the TL1000SV which again came with two 4 piston calipers and a 5/8" Master, I upgraded to the GSXR 6-pot calipers and ended up going to a 3/4" (18mm ish) Nissin Master-cylinder before changing to a 20 X 19 Brembo Radial.
These days on both my 998s I have the AP adjustable ratio CP4125 M/Cyls as these allow you to dial in the feel that you want by adjusting the pivot point. Not saying I like my AP brakes but I'be been up to Leeds today and come back with a set of CP4466 6-pot calipers, CP4125 M/Cyl and some 320mm diameter 6mm thick race discs.
Quite a few modern bikes are now running 3/4" Nissin Radial M/Cyls with twin 4-pot calipers.
One thing that often gets missed is the position of the pivot point, the Brembo RCS has a couple of positions for it, the Magura has 3 I think and the AP has quite a range
I probably have 10 or more of my old jap bike M/cyls stored away, including several newer radial ones, I'll have to dig them out and see what I have.
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