Noise/knock at idle?

It is normal. My 200 seems to be more pronounced than my 220, but they both "knock" and have from day one. You can lesson this by adding a little more oil to you tranny. I use an entire quart. Type tranny oil and amount will differ from person to person.
Lew

Standard equipment on kawis, it seems, and lew is right about the oil.

I use a bit (100ml or so) of a quart to flush out some of the junk after the oil has drained, put the plug back in and add the remaining (say 850ml or so).

Some say they can hear their KIPS snap open...I can't say that at 6000rpm I can hear much of anything except exhaust noise. At idle, though the KIPS isn't making noise...indeed should be held somewhat stable due to detents on gears held in place with springs and such.

Curious...know why it had a 9 plug in it? The oem 8 is plenty cold enough. I can't imagine a 9 would even work (for more than a bit)!!

The kdx is a hardy, hearty machine. While the 220 piston is a known weak spot, the 200 isn't. Unless it's been really abused, you don't have anything to worry about.

Take a look a CDave's site:

http://justkdx.dirtrider.net

..for info/tips on new bike care. Things need to be greased, for starters. Ignore them and I guarantee you'll be replacing suspension components in a short while.

Have fun!!