I have never been happy with the brakes on my 05 zx10r. I upgraded to braided lines and still not happy.
I had a gsxr600 prior to this, and the brakes were great, so a bit of a disappointment when I got the zx. They have been bled fine, many times by myself, and taken to a bike shop. I replaced the master cylinder rubbers, and it didn't really help either.
One guy at a bike shop said it is just a problem with this model. If so, any ideas of master cylinders that would be a direct replacement, and connect straight up to my braided lines? maybe r1, or gsxr?
Cheers.