Yamaha XP500 - Page 504

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ELEC
STARTER MOTOR
b. If any resistance is out of specification,
replace the starter motor.
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Pocket tester
90890-03112, YU-03112-C
Armature coil
Commutator resistance
1
0.0015 ~ 0.0025
Ω
at 20 °C (68 °F)
Insulation resistance
2
Above 1 M
Ω
at 20 °C (68 °F)
5. Measure:
• brush length a
Out of specification → Replace the brushes
as a set.
6. Measure:
• brush spring force
Out of specification → Replace the brush
springs as a set.
7. Check:
• gear teeth
Damage/wear → Replace the gear.
Brush length wear limit
4.0 mm (0.16 in)
Brush spring force
7.65 ~ 10.01 N
(780 ~ 1,021 gf, 27.53 ~ 36.04 oz)
8. Check:
• bearing 1
• oil seal 2
• bushing 3
Damage/wear → Replace the defective
part(s).