Track Day Winner
Join Date: Jan 2007
Motorcycle: 2001 GSX-R 1000
Re: Brake upgrade on K4 Thou
No, its not too easy. The k4 1000 can interchange exactly with only the 04/05 600/750 calipers. The k3 1000 calipers fit, but they are 4 pads per caliper, and thus, much more expensive to maintain.
I just did a switch to the k5 1000 calipers which bolt right on, but need a bigger diameter rotor(ie you have a 300mm rotor, and they need a 310mm). I was able to source a set of rotors from an SV 1000, and they are the only310mm rotors that mount up to our wheel pattern. So if you can find that combo, you are golden.
I just did this to my k4, along with a 19x20 brembo master cylinder, spiegler brake lines, and a set of carbonne lorain pads. Braking is once again exciting and precise. Good luck!