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ELEC
STARTER MOTOR
EBS01064
CHECKING THE STARTER MOTOR
1. Check:
• commutator
Dirt
→
Clean with 600-grit sandpaper.
2. Measure:
• commutator diameter
a
Out of specification
→
Replace the starter
motor.
3. Measure:
• mica undercut
a
Out of specification
→
Scrape the mica to
the proper measurement with a hacksaw
blade that has been grounded to fit the
commutator.
NOTE:
_
The mica of the commutator must be undercut
to ensure proper operation of the commutator.
Commutator wear limit
27 mm (1.06 in)
Mica undercut
0.7 mm (0.03 in)
4. Measure:
• armature assembly resistances
(commutator and insulation)
Out of specification
→
Replace the starter
motor.
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a. Measure the armature assembly resis-
tances with the pocket tester.
b. If any resistance is out of specification,
replace the starter motor.
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Pocket tester
P/N. YU-03112-C, 90890-03112
Armature coil
Commutator resistance
1
0.004 ~ 0.005
Ω
at 20 °C (68 °F)
Insulation resistance
2
Above 1 M
Ω
at 20 °C (68 °F)
Summary of Contents for 2003 YFZ450S
Page 1: ...YFZ450S5TG2 AE1 SERVICE MANUAL ...
Page 2: ......
Page 8: ......
Page 9: ...GEN INFO 1 ...
Page 11: ...GEN INFO ...
Page 20: ......
Page 21: ...SPEC 2 ...
Page 23: ...SPEC ...
Page 34: ...2 11 SPEC ENGINE SPECIFICATIONS Cylinder head tightening sequence ...
Page 69: ......
Page 70: ...CHK ADJ 3 ...
Page 139: ...ENG 4 ...
Page 143: ...ENG ...
Page 224: ...COOL 5 ...
Page 226: ...COOL ...
Page 234: ......
Page 235: ...CARB 6 ...
Page 237: ...CARB ...
Page 248: ...CHAS 7 ...
Page 320: ......
Page 321: ...ELEC 8 ...
Page 323: ... ELEC ...
Page 338: ...8 15 ELEC IGNITION SYSTEM 4 Install throttle lever cover ...
Page 366: ...TRBL SHTG 9 ...
Page 368: ...TRBL SHTG ...
Page 374: ...YAMAHA MOTOR CO LTD 2500 SHINGAI IWATA SHIZUOKA JAPAN ...