I took my 00 200EXC for an overnight run with a mixture of fast gravel and second rate tar roads and I was getting 10l/100K, (23.52 MPG).
Bike was geared up for it (14 front, 40 rear) the only gear I was carrying was a 30l back pack and I was just cruising most of the time.
KDX Super Fan!
My Spot HERE
(active and on a trip).