I read on a motorcycle magazine that there's no such thing as rotor warping but rather the transfer of break pad material onto the rotor when held hot during a stop.
The motorcycle in question was the Concours which from what I know uses the same rotors and pads as the 14's.
The remedy was quite simple and cheap although perhaps a bit laborous. Sand papering "old-fashioned garnet sandpaper" per the article, so the rotor gets rid of the brake pad residue.
My front brakes are "wavy" and the pads and rotors within specs so I may just give this a try and report back.
Ah! BTW, I didn't make this up, you can read the magazine article in question on the Motorcyclist issue for March 2009, page 97, Kawasaki Concours article by Dexter Ford.
2006 Kawasaki ZX14 Ninja 1400. New on 12/29/07 22K+ miles June 2009.(GONE!!!)
Im bikeless now... except for the hardly working old Kat...
=====================================================================
"I rather be down here wishing to be up-there than up-there wishing to be down here"
Aviator's saying.