Charging Voltage Inspection
Check the battery condition (see Charging Condition In-
spection in this chapter).
Warm up the engine to obtain actual alternator operating
Front Seat (see Front Seat Removal in the Frame chap-
Check that the ignition switch is turned off, and connect
the hand tester [A] as shown in the table.
Special Tool - Hand Tester: 57001-1394
Start the engine, and note the voltage readings at vari-
ous engine speeds with the headlight turned on and then
turned off. (Disconnect the headlight connector in the up-
per fairing.) The readings should show nearly battery volt-
age when the engine speed is low, and, as the engine
speed rises, the readings should also rise. But they must
be kept under the specified voltage.
Tester (+) to
25 V DC
Turn off the ignition switch to stop the engine, and discon-
nect the hand tester.
If the charging voltage is kept between the values given in
the table, the charging system is considered to be working
If the charging voltage is much higher than the values
specified in the table, the regulator/rectifier is defective
or the regulator/rectifier leads are loose or open.
If the charging voltage does not rise as the engine speed
increases, then the regulator/rectifier is defective or the
alternator output is insufficient for the loads. Check the
alternator and regulator/rectifier to determine which part
Tester (–) to
14.2 ∼ 15.2 V
ELECTRICAL SYSTEM 16-35