Thanks for all the replies. rammy, that's a good idea but unfortunately the pads are already beveled. loudhvx, when I replaced the pads on my wife's car I saved the shims from the old brakes because I was thinking the same thing. I will have to cut them to the right size. I just hope with the increased thickness I will still be able to fit the pads over the rotor. If I can't find original Kawasaki pads like wireman and Ronkz650 suggested at a reasonable price I will try the shims and post the results.
thanks,