Just a small note, the KK is the only one that got real ?????-??R race parts in it, as in WR valves and drilled/lightened lower valve spring collars. The KHK had none of these!!!
I had a KK for a while, quite original, it never went apeshit as my KHK somehow... Still hit 90mph everyday, got in some fight with evos and won. Put it once for a laught in a Dyno Shoot Out... Got 11 bhp out of it in 3rd gear, it wouldn't pull 4th gear on the machine!!!