Even on Cars its more of a "cool" Factor. most guys in local car club run blank rotors. Not Slotted or Drilled rotors.Other than the "cool" factor of slotted rotors on an atv, whats the point? Unless the brakes are sticking, there isn't any braking performance to be gained. Its not like a car where hot brakes could be an issue if you are constantly on them.
I have a few more mods(repairs) need for my Rubicon, but Disc breaks are on the list to have be for next year spring ride. I been eye balling the SuperATV Kit's! seem to be a good Kit to me at a decent price.