Yamaha FZR400 1988-1989 Service Manual page 326

ELECTRIC STARTING SYSTEM -1
If the resistance is incorrect, replace the
??
starter motor.
5. Measure:
Brush length @
??
Out of specification --f Replace.
6. Measure:
Brush spring pressure
??
Fatigue/Out of specification + Replace as a
set.
Brush Spring Pressure:
7. Inspect:
Bearing
??
Wear/Damage + Replace.
Installation
1. Install:
NOTE :
Align the match marks @ on the bracket with
the match marks @ on the housing.
a-32
Armature Coil Resistance:
Continuity Check @ :
Insulation Check @ :
More than 1MR at 20°C (68°F)
Brush Length Limit:
mm (0.20 in)
5.0
(19.05
540 - 660 g