Checking The Oil Pump; Checking The Relief Valve - Yamaha YZF-R1S Service Manual

OIL PAN AND OIL PUMP
EAS00364

CHECKING THE OIL PUMP

1. Check:
S oil pump driven gear 1
S oil pump rotor housing 2
S oil pump cover
Cracks/damage/wear ! Replace the de-
fective part(s).
2. Measure:
S inner-rotor-to-outer-rotor-tip clearance a
S outer-rotor-to-oil-pump-housing
b
1 Inner rotor
2 Outer rotor
3 Oil pump housing
Inner-rotor-to-outer-rotor-tip
clearance
0.01 X 0.10 mm
(0.0004 X 0.0039 in)
<Limit>: 0.18 mm (0.0071 in)
Outer-rotor-to-oil-pump-housing
clearance
0.09 X 0.15 mm
(0.0035 X 0.0059 in)
<Limit>: 0.22 mm (0.0087 in)
3. Check:
S oil pump operation
Rough movement ! Repeat steps (1) and
(2) or replace the defective part(s).
EAS00365

CHECKING THE RELIEF VALVE

1. Check:
S relief valve body 1
S relief valve 2
S spring 3
S O-ring 4
Damage/wear ! Replace the defective
part(s).
5-67
ENG
clearance