Yamaha 2016 Grizzly yf700gg, Service Manual, Page: 243 / 474

ELECTRIC STARTER
5-42
EBS30157
CHECKING THE STARTER MOTOR
1. Check:
• Commutator
Dirt
→
Clean with 600-grit sandpaper.
2. Measure:
• Mica undercut “a”
Out of specification
→
Cut the mica to the
proper measurement with a hacksaw blade
that has been grounded to fit the commutator.
TIP
The mica of the commutator must be undercut to
ensure proper operation of the commutator.
3. Measure:
• Armature assembly resistances (commutator
and insulation)
Out of specification
→
Replace the starter
motor.
▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼ ▼▼▼ ▼ ▼▼▼
a. Measure the armature assembly resistances
with the digital circuit tester.
b. If any resistance is out of specification, re-
place the starter motor.
▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲ ▲▲▲ ▲ ▲▲▲
4. Measure:
• Brush length “a”
Out of specification
→
Replace the brush set.
5. Check:
• Gear teeth
Damage/wear
→
Replace the gear.
6. Check:
• Bearing
• Oil seal
Damage/wear
→
Replace the defective
part(s).
EBS30158
ASSEMBLING THE STARTER MOTOR
1. Install:
• Starter motor yoke “1”
• Starter motor front cover “2”
• Starter motor rear cover “3”
TIP
Align the match marks “a” on the starter motor
yoke with the match marks “b” on the starter mo-
tor front and rear covers.
Mica undercut (depth)
0.70 mm (0.03 in)
Digital circuit tester
90890-03174
Model 88 Multimeter with ta-
chometer
YU-A1927
Armature coil
Commutator resistance “1”
0.0050–0.0150
Ω
at 20 °C (68 °F)
Insulation resistance “2”
Above 1 M
Ω
at 20 °C (68 °F)
a
Brush overall length limit
6.50 mm (0.26 in)
T
R
.
.
Starter motor cover bolt
5 Nm (0.5 m·kgf, 3.6 ft·lbf)
M
1
2
a