JamesS : Ok. From my Kawasaki Motorcycle Service Manual Supplement
2000 KX500-E12 thru 2004 KX500-E16
Keihin PWK 39 Carburetor
Float height 16mm + or - 1mm 0.63 in. + or - 0.04 in.
Service fuel level -1.0 + or - 1mm -0.04 + or - 0.04 in.
(below the bottom edge of the carb. body)
That should get you down the road, good luck,
Danger