Yamaha TTR250L Service Manual page 282

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ELECTRICAL STARTING SYSTEM
NOTE:
The mica insulation of the commutator
must be undercut to ensure proper opera-
tion of the commutator.
4.Inspect:
Armature coil (insulation/continuity)
Defects → Replace the starter motor.
**********************************
Inspecting steps:
Connect the pocket tester for continuity
check 1 and insulation check 2.
Measure the armature resistances.
If a resistance is incorrect, replace the
starter motor.
**********************************
5.Measure:
Brush length a
Out of specification → Replace.
6.Inspect:
Bearing
Oil seal
O-rings
Bush
Damage → Replace.
Assembly
Reverse the "Removal" procedure.
Note the following points.
1.Install:
Armature 1
Washers 2
7 - 21
ELEC
Armature coil resistance:
Continuity check 1:
0.0017 ~ 0.0027 Ω at 20 °C (68 °F)
Insulation check 2:
More than 1 MΩ at 20 °C (68 °F)
Brush length limit:
4 mm (0.16 in)
+

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