There's no idle adjustment for the K, so you know. Your symptoms match 100% a vacuum leak. Remove your left side panel, and most likely you'll find a loose vacuum (there're 4) from the solenoid that sucks fumes from the canister. Cut the tip of the hoses, and insert them all the way in. Other than removing all that crap (like I did), that should take care of your problem for a while.
The other reason for high idle, but not that high (I had it), and only when hot, are misadjusted throttle cables (as of too tight).
Ks don't usually idle perfectly, so expect some very mild fluctuation, but always around 1K rpm. Hope this helps.