RE: the R6 MC, as it runs 4 pot calipers on the Yamaha, it will run the 4 pots on your Suzuki. Trying to run master cylinders designed for smaller calipers is a bad idea. I had a CBR400R once (twin pot sliding calipers) and the m/cyl died, so i fitted a RGV m/cyl as a bodge fix. It was my work bike (courier in London) and i needed it on the road. It was awful. Truly awful; No action, wooden feel, its the situation when bigger isn't better.
It depends on how it was designed. The 14mm 600 MC is just too small for those calipers. The same as the 750 16mm MC for the six pots.
The Yamaha has a 16mm MC, it should work very well with the 4 pots, theoretically.
"When you design a hydraulic system it's important to have good feedback from the lever as to how much lever force to apply to achieve a desired braking rate. Having good feel, sensitivity and control is the major factor influencing braking quality.
The main factor in designing good braking modulation characteristics is the ratio of the total area of the caliper pistons to the area of the master cylinder.
The Panigale calipers have a total piston area of 5655 sq. mm and has a master cylinder area of 201 sq. mm. This gives a hydraulic ratio of 5655/201 = 28.1.
The RCS brake master cylinder has an area of 284 sq. mm. Used with the Panigale calipers you get an hydraulic ratio of 5655/284 = 19.9.
A general design rule-of-thumb for twin rotor brake systems is as follows:
30:1 - soft feel
27:1 - sweet spot for design
23:1 - firm feel
20:1 - wooden feel
2009 GSXR1000 calipers = 6459.11
(4) 30mm pistons = 4 x 706.86 = 2827.43
(4) 34mm pistons = 4 x 907.92 = 3631.68
2827.43 + 3631.68 = 6459.11
Brembo 19x18 = 283.53
6459.11 / 283.53 = 22.78
OEM GSXR set up, I guess that put us at almost Firm Feel... ~19mm MC
Let's see what we can get from a 16mm Master = 201.06 Yamaha R6R
6459.11 / 201.06 = 32.12
That put us at way too soft..."
I have a Brembo 19x18 and R1/R6R calipers and it's too firm. WSB bikes have 19x18 MC and the high end Brembo calipers have 34 / 34 or bigger pistons...
I have a spreadsheet with the calculations for the six pots and four pots SRAD, but not in this computer.
If you upgrade to Brembo caliper (4x 34mm pistons), the yamaha MC diameter will be too small, if you go with 4 pots it will be in the right spot, theoretically. Also, if you upgrade to the yamaha MC with the same 6 pots, I don't think it will be worst. Instead of a shitty axial MC you will have a nice radial MC, it's supposed to be a upgrade, despite of the same diameter. Later you can get the 600 4 pots. BTW, lines might need to be different for the radial MC, be sure you check that.
I think* (not sure) that most, if not all, axial mounted brembo calipers have a 65mm bolt spacing. That adapter should work for all axial mounted brembos. There is a guy on ebay selling the adapter for half that price, here: http://www.ebay.com/itm/ZRX1200-GSX1...:WNARL:US:1123
My brembos came from a KTM superduke, which are the same from the KTM 950. I tested the brakes, and they are unreal. Smashed my balls the fist times I braked. He rode in my bike, and needless to say, couldn't push for it cause it felt like he had no brakes. I think some Ducatis and Aprilias use the same calipers.