Yamaha WR250FR Owner's Service Manual page 310

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ELECTRIC STARTING SYSTEM
5. Measure:
• Brush length a
6. Measure:
• Brush spring force
ASSEMBLY
1. Install:
• Brush spring 1
• Brush 2
2. Install:
• Armature assembly 1
CAUTION:
Be careful not to damage the brush during
installation.
3. Install:
• Gasket 1
• Starter motor yoke 2
NOTE:
• Install the starter motor yoke with its groove
a
• Align the match mark
yoke with the match mark c on the starter
motor rear cover.
6 - 15
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ELEC
Out of specification → Replace the
brushes as a set.
Min. brush length:
3.5 mm (0.14 in)
Out of specification → Replace the brush
springs as a set.
Brush spring force:
3.92 ~ 5.88 N
(400 ~ 600 gf, 14.1 ~ 21.2 oz)
Install while holding down the brush using
a thin screw driver.
New
facing front cover.
b
on the starter motor
+

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