Yamaha YB50, Service Manual

Page: 138 / 161

ELEC
IGNITION AND STARTER SYSTEM
7-8
NOTE:
• Remove the following parts before repairing the faults.
1) Side covers (right and left)
2) Rear cover
3) Front mudguard
4) Handlebar cover (upper)
• Use the following special tool for these repairs.
THE STARTER MOTOR DOES NOT FUNCTION
Pocket tester:
90890-03112
1. Fuse
• Remove the fuse.
• Connect the pocket tester (
Ω
x1) on the
fuse.
• Check the fuse to see if there is continuity.
2. Battery
• Check the conditions of the battery.
Consult the “INSPECTION OF THE BAT-
TERY” section in chapter 3.
CONTINUITY
CORRECT
Open circuit voltage:
12.8 V or more at 20 °C (68 °F)
• Check the operation of the starter motor.
3. Starter motor
• Connect the positive terminal of the battery
and the starter motor cable using a
bridge cable *
STARTER MOTOR
TURNS
NO CONTINUITY
The fuse is defective
INCORRECT
• Clean the battery terminals
• Recharge or change battery.
STARTER MOTOR DOESN’T TURN
The starter motor is defective, repair or
change.
s s
WARNING:
• The bridge cable should have the same
capacity as the cable or more, otherwise
the cable may burn .
• This composition may cause sparks, as a
result, ensure that there are no gases or
inflammable liquids in the area.