2004 YAMAHA YZF-R1SC engine

3-30
MEASURING THE ENGINE OIL PRESSURE
CHK
ADJ
WARNING
NOTE: 4. Remove:

oil gallery bolt
1
The engine, muffler and engine oil are ex-
tremely hot.
5. Install:

oil pressure gauge
1

adapter 2
Pressure gauge
90890-03153, YU-03153
Oil pressure adapter
90890-03139
6. Measure:

engine oil pressure
(at the following conditions)
Engine oil pressure
230 kPa
(2.3 kg / cm
2, 2.3 bar, 32.71 psi)
Engine speed
Approx. 5,000 r / min
Engine oil temperature
100C (212F)
Regarding the oil pressure as its own data may
fluctuate depending on the oil temperature and
viscosity, the oil pressure may fluctuate when
measuring. The following data should be used
only as a reference when measuring the engine
oil pressure.
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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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3-39
CHANGING THE COOLANT
CHK
ADJ
CAUTION:
EAS00105
CHANGING THE COOLANT
1. Remove:

bottom cowlings

side cowlings
Refer to “COWLINGS”.

rider seat
Refer to “SEATS”.
2. Remove:

coolant reservoir tank

coolant reservoir hose
3. Disconnect:

coolant reservoir cap
1
4. Drain:

coolant
(from the coolant reservoir tank)
5. Remove:

radiator cap
1
A hot radiator is under pressure. Therefore,
do not remove the radiator cap when the en-
gine is hot. Scalding hot fluid and steam may
be blown out, which could cause serious in-
jury. When the engine has cooled, open the
radiator cap as follows:
Place a thick rag or a towel over the radiator
cap and slowly turn the radiator cap coun-
terclockwise toward the detent to allow any
residual pressure to escape. When the his-
sing sound has stopped, press down on the
radiator cap and turn it counterclockwise to
remove.
The following procedure applies to all of the
coolant drain bolts and copper washers.
6. Remove:

coolant drain bolts
1
(along with the copper washers)
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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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3-41
CHANGING THE COOLANT
CHK
ADJ
CAUTION:
NOTE:
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.

If coolant comes into contact with painted
surfaces, immediately wash them with wa-
ter.

Do not mix different types of antifreeze.
13. Install:

radiator cap
14. Fill:

coolant reservoir tank
(with the recommended coolant to the maxi-
mum level mark
a)
15. Install:

coolant reservoir cap
16. Start the engine, warm it up for several min-
utes, and then stop it.
17. Check:

coolant level
Refer to “CHECKING THE COOLANT LEV-
EL”.
Before checking the coolant level, wait a few
minutes until the coolant has settled.
18. Install:

rider seat
Refer to “SEATS”.

bottom cowlings

side cowlings
Refer to “COWLINGS”.
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