Yamaha FJR1300N 2001 Service Manual page 541

STARTER MOTOR
4. Measure:
• armature assembly resistances (commuta-
tor and insulation)
Out of specification → Replace the starter
motor.
a. Measure the armature assembly resis-
tances with the pocket tester.
Pocket tester
90890-03112
Armature coil
Commutator resistance 1
0.024 ~ 0.030 Ω at 20 °C
Insulation resistance 2
Above 1 MΩ at 20 °C
b. If any resistance is out of specification,
replace the starter motor.
5. Measure:
• brush length a
Out of specification → Replace the brushes
as a set.
Brush length wear limit
3.65 mm
6. Measure:
• brush spring force
Out of specification → Replace the brush
springs as a set.
Brush spring force
5.28 ~ 7.92 N (540 ~ 800 gf)
7. Check:
• gear teeth
Damage/wear → Replace the gear.
8. Check:
• bearing
• oil seal
Damage/wear → Replace the defective
part(s).
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