2003 Kawasaki 1100 STX D.I. Jet Ski Factory Service Manual, Page 36Get this manual
PERIODIC MAINTENANCE 2-7 Maintenance Procedure Electrical System
Battery Charging Condition Inspection
Battery charging condition can be checked by measuring battery terminal voltageDisconnect the battery terminal leads (see Battery Removal in the Electrical System chapter)
CAUTION
Be sure to disconnect the negative terminal lead first
Measure the battery terminal voltageNOTE
Measure with digital voltmeter [A] which can be read one decimal place voltageIf the reading is below the specified, refreshing charge is required (see Refreshing Charge in the Electrical System chapter)Battery Terminal Voltage Standard: 12.6 or more
Connect the battery leads, positive firstFuel System