Yamaha XVS1100(L) Service Manual page 315

ELECTRIC STARTING SYSTEM
EAS00769
Checking the starter motor
1. Check:
S commutator
Dirt ! Clean with 600 grit sandpaper.
2. Measure:
S commutator diameter a
Out of specification ! Replace the starter
motor.
3. Measure:
S mica undercut a
Out of specification ! Scrape the mica to the
proper measurement with a hacksaw blade
which has been grounded to fit the commuta-
tor.
NOTE:
The mica must be undercut to ensure proper op-
eration of the commutator.
4. Measure:
S armature assembly resistances (commuta-
tor and insulation)
Out of specification ! Replace the starter
motor.
a. Measure
tances with the pocket tester.
b. If any resistance is out of specification, re-
place the starter motor.
7-20
ELEC
Min. commutator diameter
27 mm
Mica undercut
0.7 mm
the armature assembly resis-
Pocket tester
90890-03112
Armature assembly
Armature coil resistance 1
0.026 X 0.034 Ω at 20 _C
Insulation resistance 2
Above 1 MΩ at 20 _C