You were right with your instincts. You want the service manual because the owners manual does'nt have the parts breakdown diagram and the torque specs. Spend the $30.00 an get it. You will be happy you purchased it.
I'm also looking for a manual for the KDX 200. year 2000
The kawasaki site only does list an owners manual, not a service manual for the bike.
You have to enter a vin number, so there doesn't seem to be a way to figure out if this is an error, or that kawasaki is out of the manuals. I know that it's probably pretty much the same manual for 1995-2004.