<SNIP>I don't feel like reading through the whole thread to see if this has been covered before, so if it has I beg pardon. I believe warped rotor or wheel offset in the forks could cause this behavior. Obviously (I think) a warped rotor would be noticeable in the bars on braking so apparently not warped. But the wheel offset may not be noticeable except as what you are describing. By wheel offset I mean the wheel not centered between the forks. I suspect the mechanics who have looked at it have checked for this but maybe not. Good luck.
So, I'll leave this post sleeping until the beginning of March, when I'll pick up the bike and see if there's anything improved.
Meanwhile, if any of you guys has any suggestion, I'm all ears.
well, the issue has been solved. After replacing the brake lines by SS lines, disconnecting the ABS unit and driving around a few days, changing the brake pump, bleeding the lines, and redoing callipers and master cylinders, I decided to go bold and just change the callipers. My dealer, Kawasaki Europe and I figured that if there was something wrong with the callipers, and they were retracting the pistons too much, that could explain behaviour. So I sourced both front brake callipers from a salvage yard and had them mounted, and voilĂ , brakes run perfectly for the 1000 miles that I had the bike until I was run by a bus.
So... short lived good news
Case closed.
You going to salvage the salvage calipers?