Yamaha YFM250RX 2008 Service Manual page 289

STARTER MOTOR
b. If any resistance is out of specification,
replace the starter motor.
5. Measure:
• brush length
Out of specification → Replace the brushes
as a set.
Brush length wear limit
3.5 mm (0.14 in)
6. Measure:
• brush spring force
Out of specification → Replace the brush
springs as a set.
Brush spring force
5.52 ~ 8.28 N
(563 ~ 844 gf, 19.85 ~ 29.78 oz)
7. Check:
• gear teeth
Damage/wear → Replace the gear.
8. Check:
• bushing
• bearing
• oil seal
Damage/wear → Replace the defective
part(s).
7-22
ELEC