Yamaha XT250X - Removing the Balancer Gear; Checking the Oil Pump; Checking the Oil Strainer

OIL PUMP AND BALANCER GEAR
5-40
EAS3C51008
REMOVING THE BALANCER GEAR
1. Straighten the lock washer tab.
2. Loosen:
● Balancer driven gear unit “1”
NOTE:
Insert aluminum plate “a” between balancer
drive gear “2” and balancer driven gear “3”, and
loosen the balancer driven gear nut.
3. Remove:
● Balancer drive gear
Refer to “CLUTCH” on page 5-30.
EAS24960
CHECKING THE OIL PUMP
1. Check:
● Oil pump driven gear
● Oil pump housing
● Oil pump housing cover
Cracks/damage/wear → Replace the defec-
tive part(s).
2. Measure:
● Inner-rotor-to-outer-rotor-tip clearance “a”
● Outer-rotor-to-oil-pump-housing clearance
“b”
● Oil-pump-housing-to-inner-rotor-and-out-
er-rotor clearance “c”
Out of specification → Replace the oil pump.
3. Check:
● Oil pump operation
Rough movement → Repeat steps (1) and
(2) or replace the defective part(s).
EAS24990
CHECKING THE OIL STRAINER
1. Check:
●
Oil strainer
Damage → Replace.
Contaminants → Clean with solvent.
Inner-rotor-to-outer-rotor-tip
clearance
0.150 mm (0.0059 in)
Limit
0.200 mm (0.0079 in)
Outer-rotor-to-oil-pump-housing
clearance
0.100–0.151 mm (0.0039–0.0059
in)
Limit
0.221 mm (0.0087 in)
Oil-pump-housing-to-in-
ner-and-outer-rotor clearance
0.04–0.09 mm (0.0016–0.0035 in)
Limit
0.16 mm (0.0063 in)
1. Inner rotor
2. Outer rotor
3. Oil pump housing