1999 YAMAHA YZF-R7 Owners Manual

4 - 53
ENGOIL PAN AND OIL PUMP
EB411100
REMOVING THE OIL PAN
1. Remove:
• oil level switch 1
• oil pan 2
• oil pan gasket
• dowel pins
NOTE:
Loosen each bolt 1/4 of a turn at a time,
in stages and in a crisscross pattern.
After all of the bolts are fully loosened,
remove them.
REMOVING THE OIL PUMP
1. Remove:
• oil/water pump assembly driven
sprocket
Flywheel puller
90890-01080
EB411400
CHECKING THE OIL PUMP
1. Check:
• oil/water pump assembly driven
sprocket 1
• oil pump housing 2
Cracks/damage/wear ® Replace the
defective part(-s).
2. Measure:
• inner rotor-to-outer rotor tip clearance
a
• outer rotor-to-oil pump housing clear-
ance b
Out of specification ® Replace the oil
pump.
1 Inner rotor
2 Outer rotor
3 Oil pump housing
Inner rotor-to-outer rotor tip
clearance
0.09 ~ 0.15 mm
(0.004 ~ 0.006 in)
Outer rotor-to-oil pump hous-
ing clearance
0.03 ~ 0.08 mm
(0.001 ~ 0.003 in)

4 - 54
ENGOIL PAN AND OIL PUMP
3. Check:
• oil pump operation
Unsmooth ® Repair or replace the
defective part(-s).
Refer to “WATER PUMP” in chapter 5.
EB411410
CHECKING THE RELIEF VALVE
1. Check:
• relief valve body 1
• relief valve 2
• spring 3
• O-ring 4
Damage/wear ® Replace the defective
part(-s).
EB411421
CHECKING THE OIL DELIVERY PIPE AND
OIL PIPE
1. Check:
• oil delivery pipe 1
• oil pipe 2
Damage ® Replace.
Obstruction ® Wash and blow out
with compressed air.
EB411430
CHECKING THE OIL STRAINER
1. Check:
• oil strainer 1
Damage ® Replace.
Contaminants ® Clean with engine oil.
EB411701
ASSEMBLING THE OIL PUMP
1. Lubricate:
• inner rotor
• outer rotor
• impeller shaft
(with the recommended lubricant)
Recommended lubricant
Engine oil

4 - 55
ENGOIL PAN AND OIL PUMP
2. Check:
• oil pump operation
Refer to “CHECKING THE OIL PUMP”.
EB411710
INSTALLING THE OIL PUMP
1. Install:
• oil pump 1
NOTE:
Install the oil/water pump assembly
drive chain onto the oil/water pump
assembly driven sprocket.
T R..12 Nm (1.2 m · kg, 8.7 ft · lb)
EB411720
INSTALLING THE OIL STRAINER
1. Install:
• oil strainer 1
NOTE:
The arrow a on the oil strainer housing
must point towards the front of the
engine.
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
EB411730
INSTALLING THE OIL PAN
1. Install:
• dowel pins
• oil pan gasket
• oil pan 1
• oil level switch 2
• engine oil drain bolt 3
WARNINGWARNING
Always use new copper washers.
NOTE:
• Tighten the oil pan bolts in stages and
in a crisscross pattern.
• Lubricate the oil level switch O-ring
with lithium soap base grease.
New
T R..10 Nm (1.0 m · kg, 7.2 ft · lb)
T R..43 Nm (4.3 m · kg, 31 ft · lb)

ENG
4 - 56
CRANKCASE
CRANKCASE
Order Job/Part Q’ty Remarks
Separating the crankcaseRemove the parts in the order listed.
Engine Refer to “ENGINE”.
Cylinder head Refer to “CYLINDER HEAD”.
Pickup coil and pickup coil rotor Refer to “PICKUP COIL”.
Stator coil assembly Refer to “GENERATOR”.
Clutch housing and starter clutch
idle gearRefer to “CLUTCH”.
Oil/water pump assembly Refer to “OIL PAN AND OIL PUMP”.
1 Timing chain 1
2 Oil/water pump assembly drive
chain guide1
3 Oil/water pump assembly drive
chain1

ENG
4 - 57
CRANKCASE
Order Job/Part Q’ty Remarks
4 Oil/water pump assembly drive
sprocket1
5 Washer 1
6 Lower crankcase 1
7 Dowel pin 3
For installation, reverse the removal
procedure.

ENG
4 - 58
CRANKCASE
Order Job/Part Q’ty Remarks
Removing the oil baffle plates and
oil filter boltRemove the parts in the order listed.
Connecting rod assemblies Refer to “CONNECTING RODS AND
PISTONS”.
Crankshaft Refer to “CRANKSHAFT”.
Transmission Refer to “TRANSMISSION”.
1 Oil baffle plate 1
2 Oil baffle plate 1
3 Oil delivery pipe 1
4 Bearing 1
5 Upper crankcase 1
6 Oil filter bolt 1
7 Lower crankcase 1
For installation, reverse the removal
procedure.

4 - 59
ENGCRANKCASE
EB412100
DISASSEMBLING THE CRANKCASE
1. Remove:
• crankcase bolts
NOTE:
• Loosen each bolt 1/4 of a turn at a
time, in stages and in a crisscross pat-
tern. After all of the bolts are fully loos-
ened, remove them.
• Loosen the bolts in decreasing numeri-
cal order (refer to the numbers in the
illustration).
• The numbers embossed on the crank-
case indicate the crankcase tightening
sequence.
2. Place the engine upside down.
3. Remove:
• lower crankcase
ACHTUNG:CAUTION:
Tap on one side of the crankcase with a
soft-face hammer. Tap only on rein-
forced portions of the crankcase, not on
the crankcase mating surfaces. Work
slowly and carefully and make sure that
the crankcase halves separate evenly.
M9 ´ 105 mm bolts: 1 ~ @
M8 ´ 60 mm bolt: K, L
M6 ´ 70 mm bolts: G, I, O, Q
M6 ´ 64 mm bolts: F, N
M6 ´ 60 mm bolt: M
M6 ´ 55 mm bolts: A ~ E
M6 ´ 50 mm bolt: H
M6 ´ 45 mm bolts: J, P, R
4. Remove:
• dowel pins
5. Remove:
• crankshaft journal lower bearing
(from the lower crankcase)
NOTE:
Identify the position of each crankshaft
journal lower bearing so that it can be
reinstalled in its original place.

4 - 60
ENGCRANKCASE
EB412420
CHECKING THE CRANKCASE
1. Thoroughly wash the crankcase halves
in a mild solvent.
2. Thoroughly clean all the gasket surfaces
and crankcase mating surfaces.
3. Check:
• upper crankcase
• lower crankcase
Cracks/damage ® Replace.
• oil delivery passages
Obstruction ® Blow out with com-
pressed air.
EB412440
CHECKING THE BEARINGS AND OIL SEALS
1. Check:
• bearings
Clean and lubricate the bearings, then
rotate the inner race with your finger.
Rough movement ® Replace.
CHECKING THE SPROCKETS AND CHAINS
1. Check:
• crankshaft sprocket
• oil/water pump assembly drive
sprocket
Cracks/damage/wear ® Replace the
defective part(-s).
2. Check:
• timing chain
Damage/stiffness ® Replace the tim-
ing chain and crankshaft as a set.
• oil/water pump assembly drive chain
Damage/stiffness ® Replace the oil/
water pump assembly drive chain and
oil/water pump assembly drive
sprocket as a set.