Oil Pump - Yamaha YFM250XL(C) Service Manual

4
INSPECTION AND REPAIR
Clutch spring
1.Inspect:
Clutch spring
Wear/Damage → Replace.
2.Measure:
Clutch spring free length a
Out of specification → Replace springs as
a set.
Clutch spring minimum length:
32.9 mm (1.30 in)
Clutch release lever
1.Inspect:
Release lever 1
Adjuster 2
O-ring 3
Cracks/Wear/Damage → Replace.

OIL PUMP

1.Measure:
Housing 1 /Outer rotor 2 clearance a
Use a Feeler Gauge.
Out of specification → Replace oil pump
assembly.
Side clearance limit:
0.09 mm (0.004 in)
2.Measure:
Outer rotor 1 /Inner rotor 2 clearance a
Use a Feeler Gauge.
Out of specification → Replace oil pump
assembly.
Tip clearance limit:
0.20 mm (0.008 in)
3.Inspect:
Oil pump drive gear 1
Oil pump driven gear 2
Wear/Cracks/Damage → Replace.
4 - 40
ENG