I have a 2003 KDX220 and I would say that 101 Km ( 62 Miles was very low ) I ride mine off road and road and would get more that that before hitting the reserve I have yet to try it but I will give it a ago to see.
Wow! I noticed what seemed like a small drip from my fuel line, where it connects to the tank and figured no major problem, but I only got about 35 miles out of 3/4 of a tank. So it must be leaking more than I thought if yall are getting over 60. Unless there's some other reason mechanically that would cause really low gas milage.