I did this mod yesterday to my K1 1000. It didn't have the wave washer at all. It seems that it was added to the k2 model. Now the clutch is much more controllable especially at low speeds and takeoffs. I had to discard one fiber plate because the stack was too thick and the clutch wouldn't disengage properly even with the cable readjusted. I was a bit worried about getting slippage because of reduced friction area but the clutch doesn't seem to be slipping now. Have those who removed one plate had any problems with clutch slipping?