Yamaha YZF-R1PC Utility Trailer User Manual


 
8 - 20
+
ELEC
ELECTRIC STARTING SYSTEM
EAS00769
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
23.5 mm (0.93 in)
Mica undercut
1.5 mm (0.059 in)
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.
b. If any resistance is out of specification,
replace the starter motor.
▲▲▲ ▲▲▲▲▲ ▲▲▲ ▲▲▲ ▲▲▲ ▲▲▲
Pocket tester
YM-03112
Armature coil
Commutator resistance
1
0.009 ~ 0.011
at 20 °C (68 °F)
Insulation resistance
2
Above 1 M
at 20°C (68 °F)