2003 Kawasaki 1100 STX D.I. Jet Ski Factory Service Manual, Page 251Get this manual
14-30 ELECTRICAL SYSTEM Sensors
Speed Sensor Inspection
Disconnect the speed sensor connectors [A] (see Wiring Diagram)
Connect the battery and tester leads to the sensor as shown
Rotate the waterwheel by handaslowlysensor Measure the output voltage of speed