2004 YAMAHA YZF-R1SC check engine

3-26
MEASURING THE COMPRESSION PRESSURE /
CHECKING THE ENGINE OIL LEVELCHK
ADJ
13 Nm (1.3 m
kg, 9.4 ft
lb)
NOTE: d. If the compression pressure is below the
minimum specification, pour a teaspoonful of
engine oil into the spark plug bore and mea-
sure again.
Refer to the following table.
Compression pressure
(with oil applied into the cylinder)
ReadingDiagnosis
Higher than
without oilPiston ring(s) wear
or damage

Repair.
Same as without
oilPiston, valves,
cylinder head
gasket or piston
possibly defective

Repair.
6. Install:

spark plug
7. Install:

ignition coils
EAS00069
CHECKING THE ENGINE OIL LEVEL
1. Stand the motorcycle on a level surface.

Place the motorcycle on a suitable stand.

Make sure the motorcycle is upright.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
3. Check:

engine oil level
The engine oil level should be between the
minimum level mark
a and maximum level
mark
b.
Below the minimum level mark
Add the
recommended engine oil to the proper level.
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3-27
CHECKING THE ENGINE OIL LEVEL
CHK
ADJ
NOTE:
NOTE:Recommended oil
AT 5C (40F) or higher
A
Yamalube 4 (20W40) or
SAE 20W40 type SE motor
oil
AT 1 5C (60F) or lower
B
Yamalube 4 (10W30) or
SAE 10W30 type SE motor
oil
Before checking the engine oil level, wait a few
minutes until the oil has settled.
4. Start the engine, warm it up for several min-
utes, and then turn it off.
5. Check the engine oil level again.
Before checking the engine oil level, wait a few
minutes until the oil has settled.
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3-29
CHANGING THE ENGINE OIL /
MEASURING THE ENGINE OIL PRESSURECHK
ADJ
43 Nm (4.3 m
kg, 31 ft
lb)
CAUTION:
Oil filter cartridge
17 Nm (1.7 m
kg, 12 ft
lb)
8. Replace:

engine oil drain bolt gasket
New
9. Install:

engine oil drain bolt
(along with the new gasket)
10. Fill:

crankcase
(with the specified amount of the recom-
mended engine oil)
Quantity
Total amount
3.8 L (3.35 Imp qt, 4.02 US qt)
Without oil filter cartridge
replacement
2.9 L (2.55 Imp qt, 3.07 US qt)
With oil filter cartridge
replacement
3.1 L (2.73 Imp qt, 3.28 US qt)
11. Install:

engine oil filler cap

bottom cowlings
Refer to “COWLINGS”.
12. Start the engine, warm it up for several min-
utes, and then turn it off.
EAS00077
MEASURING THE ENGINE OIL PRESSURE
1. Check:

engine oil level
Below the minimum level mark
a
Add the
recommended engine oil to the proper level.
2. Start the engine, warm it up for several min-
utes, and then turn it off.
When the engine is cold, the engine oil will
have a higher viscosity, causing the engine
oil pressure to increase. Therefore, be sure
to measure the engine oil pressure after
warming up the engine.
3. Remove:

bottom cowlings
Refer to “COWLINGS”.
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3-31
MEASURING THE ENGINE OIL PRESSURE /
ADJUSTING THE CLUTCH CABLE FREE PLAYCHK
ADJ
8 Nm (0.8 m
kg, 5.8 ft
lb)
CAUTION:
c
b
NOTE:Engine oil pressure
Possible causes
Below
ifi i
Faulty oil pump
specificationClogged oil filter
Leaking oil
passage
Broken or
damaged oil seal
Above
specificationLeaking oil
passage
Faulty oil filter
Oil viscosity too
high
7. Install:

oil gallery bolt
1
Be carful to tighten too much.
8. Install:

bottom cowlings
Refer to “COWLINGS”.
EAS00078
ADJUSTING THE CLUTCH CABLE FREE
PLAY
1. Check:

clutch cable free play
a
Out of specification
Adjust.
Clutch cable free play (at the
end of the clutch lever)
10  15 mm (0.39  0.59 in)
2. Adjust:

clutch cable free play
Handlebar side
a. Turn the adjusting dial
1 in direction b or c
until the specified clutch cable free play is ob-
tained.
Direction
Clutch cable free play is
increased.
DirectionClutch cable free play is
decreased.
If the specified clutch cable free play cannot be
obtained on the handlebar side of the cable, use
the adjusting nut on the engine side.
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3-32
ADJUSTING THE CLUTCH CABLE FREE PLAY /
REPLACING THE AIR FILTER ELEMENTCHK
ADJ
a
b
NOTE: Engine side
a. Loosen the locknut
1.
b. Turn the adjusting nut
2 in direction a or b
until the specified clutch cable free play is ob-
tained.
Direction
Clutch cable free play is
increased.
DirectionClutch cable free play is
decreased.
c. Tighten the locknuts.
Lock nut
7Nm (0.7 m
kg, 5.1 ft
lb)
EAS00086
REPLACING THE AIR FILTER ELEMENT
1. Remove:

rider seat
Refer to “SEATS”.

fuel tank
Refer to “FUEL TANK”.
2. Remove:

air filter case cover
1
3. Check:

air filter element
1
Damage
Replace.
Replace the air filter element at periodic inter-
vals of 40,000 km travel.
The air filter needs more frequent service if you
are riding in unusuallu wet or dusty areas.
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3-33
REPLACING THE AIR FILTER ELEMENT /
CHECKING THE FUEL AND BREATHER HOSESCHK
ADJ
CAUTION:
NOTE:
NOTE: 4. Install:

air filter case cover
Never operate the engine without the air fil-
ter element installed. Unfiltered air will
cause rapid wear of engine parts and may
damage the engine. Operating the engine
without the air filter element will also affect
the throttle bodies tuning, leading to poor
engine performance and possible overheat-
ing.
When installing the air filter element into the air
filter case cover, make sure their sealing sur-
faces are aligned to prevent any air leaks.
5. Install:

fuel tank
Refer to “FUEL TANK”.

rider seat
Refer to “SEATS”.
EAS00096
CHECKING THE FUEL AND BREATHER
HOSES
The following procedure applies to all of the fuel
and breather hoses.
1. Remove:

rider seat
Refer to “SEATS”.

fuel tank
Refer to “FUEL TANK”.
2. Check:

breather hose
1

fuel hose 2
Cracks / damage
Replace.
Loose connection
Connect properly.
Before removing the fuel hoses, place a few
rags in the area under where it will be removed.
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3-37
ADJUSTING THE EXUP CABLES /
CHECKING THE COOLANT LEVELCHK
ADJ
NOTE:
CAUTION:
NOTE: 7. Install:

bottom cowlings
Refer to “COWLINGS”.
EAS00102
CHECKING THE COOLANT LEVEL
1. Stand the motorcycle on a level surface.

Place the motorcycle on a suitable stand.

Make sure the motorcycle is upright.
2. Check:

coolant level
The coolant level should be between the
maximum level mark
a and minimum level
mark
b.
Below the minimum level mark
Add the
recommended coolant to the proper level.

Adding water instead of coolant lowers the
antifreeze content of the coolant. If water is
used instead of coolant check, and if nec-
essary, correct the antifreeze concentra-
tion of the coolant.

Use only distilled water. However, if dis-
tilled water is not available, soft water may
be used.
3. Start the engine, warm it up for several min-
utes, and then turn it off.
4. Check:

coolant level
Before checking the coolant level, wait a few
minutes until it settles.
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3-40
CHANGING THE COOLANT
CHK
ADJ
10 Nm (1.0 m
kg, 7.2 ft
lb)
WARNING
7. Drain:

coolant
(water pump inlet pipe and outlet pipe)
8. Check:

copper washers
1 New
9. Install:

coolant drain bolts
2
(with copper washers)
10. Install:

coolant reservoir tank
11. Connect:

coolant reservoir hose
12. Fill:

cooling system
(with the specified amount of the recom-
mended coolant)
Recommended antifreeze
High-quality ethylene glycol
antifreeze containing corrosion
inhibitors for aluminum engines
Mixing ratio
1:1 (antifreeze:water)
Quantity
Total amount
2.51 L
(2.21 Imp qt, 2.65 US qt)
Coolant reservoir capacity
0.25 L
(0.22 Imp qt, 0.26 US qt)
Handling notes for coolant
Coolant is potentially harmful and should be
handled with special care.

If coolant splashes in your eyes, thorough-
ly wash them with water and consult a doc-
tor.

If coolant splashes on your clothes, quick-
ly wash it away with water and then with
soap and water.

If coolant is swallowed, induce vomiting
and get immediate medical attention.
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