Service manual

7-13
ELEC
Electrical system
– +
Starter motor operation
1. Hold the starter motor in a vise using alu-
minum plates on both sides.
2. Connect the positive battery cable to the
starter motor terminal bolt.
3. Connect the negative battery cable to the
starter motor body, and then check the
starter motor operation. WARNING! Do
not touch the armature shaft.
TIP:
• Check the starter motor operation for a few
seconds.
• If the starter motor is disassembled, make
sure to check the operation again after
assembling it.
4. Disconnect the negative battery cable,
and then the positive battery cable from
the battery terminals.
Armature
Armature appearance
1. Check the armature. Replace if damaged
or worn.
2. Check the commutator. Clean with 600-
grit sandpaper and compressed air if
dirty.
Commutator diameter
1. Measure the commutator diameter a.
Replace the armature if below specifica-
tion.
Commutator undercut
1. Measure the commutator undercut a.
Replace the armature if below specifica-
tion.
Armature continuity
1. Check the armature for continuity.
Replace if out of specification.
Commutator diameter a:
27.0–28.0 mm (1.06–1.10 in)
Commutator undercut a (reference data):
0.2–0.7 mm (0.008–0.028 in)
a
a
a
b
c