1999 YAMAHA YZF-R7 checking oil

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)

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.

4 - 67
ENGCONNECTING RODS AND PISTONS
3. Measure:
• piston ring end gap
Out of specification ® Replace the pis-
ton ring.
NOTE:
The oil ring expander spacer’s end gap
cannot be measured. If the oil ring rail’s
gap is excessive, replace all three piston
rings.
Piston ring end gap
Top ring
0.15 ~ 0.25 mm
(0.006 ~ 0.010 in)
: 0.50 mm (0.020 in)
2nd ring
0.25 ~ 0.35 mm
(0.009 ~ 0.014 in)
: 0.70 mm (0.028 in)
Oil ring
0.1 ~ 0.3 mm
(0.004 ~ 0.012 in)
EB404421
CHECKING THE PISTON PINS
The following procedure applies to all of
the piston pins.
1. Check:
• piston pin
Blue discoloration/grooves ® Replace
the piston pin and then check the lubri-
cation system.
2. Measure:
• piston pin outside diameter a
Out of specification ® Replace the pis-
ton pin.
Piston pin outside diameter
16.995 ~ 17.000 mm
(0.6691 ~ 0.6693 in)
: 16.975 mm (0.6683 in)
3. Measure:
• piston pin bore diameter (in the piston)
Out of specification ® Replace the pis-
ton pin.
Piston pin bore diameter
(in the piston)
17.004 ~ 17.015 mm
(0.6694 ~ 0.6699 in)
: 17.045 mm (0.6711 in)

5 - 10
COOL

OIL COOLER
EB501010
CHECKING THE OIL COOLER
1. Check:
• oil cooler
Cracks/damage
®
Replace.
2. Check:
• oil cooler inlet hose
• oil cooler outlet hose
Cracks/damage/wear
®
Replace.
3. Check:
• water jacket joint
• water jacket joint inlet hose
• water pump outlet hose
Cracks/damage
®
Replace.
EB501020
INSTALLING THE OIL COOLER
1. Clean:
• mating surfaces of the oil cooler and
the crankcase
(with a cloth dampened with lacquer
thinner)
2. Install:
• O-ring
• oil cooler
1
• gasket 2
• bolt 3
NOTE:
• Before installing the oil cooler, lubri-
cate the oil cooler bolt and O-ring with
a thin coat of engine oil.
• Make sure that the O-ring is positioned
properly.
• Align the projection a on the oil
cooler with the projection b in the
crankcase.
1
1

3

3

2

2

a ab
b
New
New
T R..63 Nm (6.3 m · kg, 45 ft · lb)

5 - 11
COOLOIL COOLER
3. Fill:
• cooling system
(with the specified amount of the rec-
ommended coolant)
Refer to “CHANGING THE COOLANT”
in chapter 3.
• crankcase
(with the specified amount of the rec-
ommended engine oil)
Refer to “CHANGING THE ENGINE
OIL” in chapter 3.
4. Check:
• cooling system
Leaks ® Repair or replace any faulty
part.
5. Measure:
• radiator cap opening pressure
Below the specified pressure ®
Replace the radiator cap.
Refer to “CHECKING THE RADIATOR”.

5 - 14
COOLWATER PUMP
EB503020
DISASSEMBLING THE WATER PUMP
1. Remove:
• water pump seal 1
NOTE:
Tap out the water pump seal from the
inside of the water pump housing.
2Water pump housing
2. Remove:
• oil seal 1
• bearing 2
NOTE:
Tap out the bearing and oil seal from the
outside of the water pump housing.
3Water pump housing
3. Remove:
• rubber damper holder 1
• rubber damper 2
(from the impeller, with a thin, flat-
head screwdriver)
NOTE:
Do not scratch the impeller shaft.
EB503032
CHECKING THE WATER PUMP
1. Check:
• water pump housing cover 1
• water pump housing 2
• impeller 3
• rubber damper 4
• rubber damper holder 5
Cracks/damage/wear ® Replace.
2. Check:
• water pump seal
• oil seal
• water pump inlet pipe
Cracks/damage/wear ® Replace.
• bearing
Rough movement ® Replace.

7 - 12
CHAS
REAR WHEEL, BRAKE DISC, AND REAR WHEEL
SPROCKET
EB701100
REMOVING THE REAR WHEEL
1. Stand the motorcycle on a level surface.
WARNINGWARNING
Securely support the motorcycle so that
there is no danger of it falling over.
NOTE:
Place the motorcycle on a suitable stand
so that the rear wheel is elevated.
2. Remove:
• brake caliper
NOTE:
Do not depress the brake pedal when
removing the brake caliper.
3. Remove:
• wheel axle nut
• washer
• wheel axle
• rear wheel
NOTE:
Push the rear wheel forward and
remove the drive chain from the rear
wheel sprocket.
EB701400
CHECKING THE REAR WHEEL
1. Check:
• wheel axle
• rear wheel
• wheel bearings
• oil seals
• brake disc
Refer to “FRONT WHEEL”.
2. Check:
• tire
• rear wheel
Damage/wear ® Replace.
Refer to “CHECKING THE TIRES” and
“CHECKING THE WHEELS” in chapter 3.