![background image](/i/yamaha/162252/yamaha-vmx12h-1995/h/yamaha-vmx12h-1995-314.png)
ELECTRIC STARTING SYSTEM
Insulation Resistance:
1
Mi2 or more
a t
20°C
or
more
Removal
1.
Remove:
motor
Refer to "CHAPTER
3.
ENGINE DIS-
ASSEMBLY" section.
Inspection and Repair
Commutator
1.
Inspect:
Dirty
Clean with
grit
sandpaper.
2.
Measure:
Commutator diameter
Out of specification
Replace starter
motor.
3. Measure:
undercut
(betweencommutator segments)
Out of specification
Scrape mica to
proper valve.
Use a hacksaw blade that is ground to fit.
Mica Undercut:
0.7
mm
(0.028
in)
NOTE:
The mica insulation of the commutator must be
undercut to ensure proper operation of the
mu
r.
4.
Measure:
coil
Replace starter motor.
Continuity check
Insulation check
Armature coil
7-1 1