3. Installed monoblock nissin calipers from 2013 ZX6 - all you need is the correct bolts and they are straight swap - absolutely amazing brakes - no change to master cylinder. I have been running this setup now for almost 2 years, 1 finger braking (although I use 2). The initial bite, feel and progression is better than the brembo monoblocks on my Brutale 1078RR
+1 for 2013 ZX6R Nissin monos (not same as earlier 4 pad Nissins).
Running them on my race bike and they stay consistent as pad wears down. They feel maybe minor bit better as Gen4 stock calipers in my opinion and don't lose all precision when 1/3 pad left.
The best about them is steel pistons (less expanding with heat and times less heat transfer compared to aluminum).
Pad wear more even (but not perfect), due to 30/32mm pistons.
Wized36, may I suspect you had much improvement coming from just better pad. Im a fan of EBC GPFAX (race) pads, running them on Busa OEM Brembos too, no comparation to other EBC pads what I call junk after having GPFAX. If you wanna try then GPFAX296HH is the number for 13 Nissin.
There is however a catch to putting them on Gen4: Disk is very lightly scratching caliper. Disk groove on that caliper is very narrow (probalby ZX6R has thinner disks). What I did was: fixed calipers to vice, took real big angle grinder and made that gap ca. 1mm wider (outer side only), it takes good nerve and steady hand. Grinding there does not make caliper construction weaker.
Used shorter ZX6R 13 OEM bolts.