1986-1991 Kawasaki 650 X-2 Service Manual, Page 44Get this manual
3-6 ENGINE LUBRICATION SYSTEM -Push the filler tube onto the bottom of the filler-Slide the clamp into position, and tighten it securely
Oil Tank Cleaning
-Flush the tank repeatedly with high flash-point solvent until it is clean
ACheck Valve
Oil Level Gauge Inspection
-Remove the oil tank cap-Check that the float moves up and down on the poles, and that the needle moves from the to marks proportionally to float movement