2004 YAMAHA YZF-R1S radiator cap

1-9
SPECIAL TOOLS
GEN
INFO
NOTE:
EAS00027
SPECIAL TOOLS
The following special tools are necessary for complete and accurate tune-up and assembly. Use only
the appropriate special tools as this will help prevent damage caused by the use of inappropriate tools
or improvised techniques. Special tools, part numbers or both may differ depending on the country.
When placing an order, refer to the list provided below to avoid any mistakes.

For U.S.A. and Canada, use part number starting with “YM-”, “YU-”, or “ACC-”.

For others, use part number starting with “90890-”.
Tool No.
Tool name / FunctionIllustration
90890-01304
YU-01304
Piston pin puller
This tool is used to remove the piston pins.
Radiator cap tester
90890-01325
YU-24460-01
Adapter
90890-01352
YU-33984Radiator cap tester
Radiator cap tester adapter
These tools are used to check the cooling
system.
90890-01403
YU-33975
Steering nut wrench
This tool is used to loosen or tighten the
steering stem ring nuts.
90890-01423
YM-01423
Damper rod holder
This tool is used to hold the damper rod as-
sembly when loosening or tightening the
damper rod assembly bolt.
90890-01426
YU-38411
Oil filter wrench
This tool is needed to loosen or tighten the
oil filter cartridge.
90890-01434
YM-01434
Rod holder
This tool is used to support the damper ad-
justing rod.
Rod puller
90890-01437
YM-01437
Rod puller
attachment
90890-01436
YM-01436Rod puller
Rod puller attachment
These tools are used to pull up the front
fork damper rod.
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2-3
ENGINE SPECIFICATIONSSPEC
ItemStandardLimit
Oil filter
Oil filter type
Bypass valve opening pressure
Paper
80  120 kPa (0.8  1.2 kg / cm2,
0.8  1.2 bar, 11.6  17.4 psi)








Oil pump
Oil pump type
Inner-rotor-to-outer-rotor-tip
clearance
Outer-rotor-to-oil-pump-housing
clearance
Trochoid
0.01  0.10 mm
(0.0004  0.0039 in)
0.09  0.15 mm
(0.00035  0.0059 in)



0.18 mm
(0.0071 in)
0.22 mm
(0.0087 in)
Cooling system
Radiator capacity
Radiator cap opening pressure
Radiator core
Width
Height
Depth
Coolant reservoir
Capacity
Water pump
Water pump type
Reduction ratio
Max. impeller shaft tilt
2.51 L (2.21 Imp qt, 2.65 US qt)
108  137 kPa (1.08  1.37 kg / cm2,
1.0  1.3 bar, 15.6  19.9 psi)
380 mm (14.96 in)
258 mm (10.2 in)
24 mm (0.94 in)
0.25 L (0.22 Imp qt, 0.26 US qt)
Single suction centrifugal pump
65 / 43
25 / 32 (1.181)































0.15 mm
(0.006 in)
Starting system typeElectric starter
Spark plugs
Model (manufacturer)
quantity
Spark plug gap
CR9EK (NGK)
4
0.6  0.7 mm (0.0236  0.0276 in)







Cylinder head
Volume
Max. warpage
12.5  13.1 cm3 (0.76  0.80 cu.in)







0.10 mm
(0.0039 in)
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2-28
1Thermostat
2Radiator cap
3Radiator
4Oil cooler
COOLING SYSTEM DIAGRAMSSPEC
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2-43
33Throttle body side cap
34Mud guard
35Turn signal light lead
36License plate light lead
37Rear fender rib
38Speed sensor lead
39Rear brake light switch lead
40Rear frame
41Swingarm bracket
42Main fuse lead
43Starting circuit cut-off relay lead
44Turn signal light relay lead
45Starter relay lead
46Main fuse lead (To the battery
positive lead)
47Right handlebar switch lead
17Battery negative lead
18Starter motor lead
19A.C.magneto lead
20Oil level switch lead
21Sidestand switch lead
22Throttle body lead
23Coolant reservoir tank drain hose
24Fuel tank drain hose
25Cover 7
26Radiator fan motor lead (left)
27Radiator fan motor lead (right)
28Wire harness
29Pipe 3
30Frame
31Coolant reservoir tank hose
32Thermo stat assembly breather
hose
CABLE ROUTINGSPEC
1Heat protector
2Crankshaft position sensor lead
3Neutral switch lead
4Ground lead
5Coolant reservoir tank
6Battery positive lead
7Starter relay
8Turn signal relay
9Main fuse
10Lean angle cut-off switch
11Atmospheric pressure sensor
12Tail / brake light lead
13Rear fender
14Seat lock cable
15Anti safety alarm coupler
16Starting circuit cut-off relay
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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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3-41
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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6-3
RADIATORCOOL
NOTE:
EAS00455
CHECKING THE RADIATOR
1. Check:

radiator fins
Obstruction
Clean.
Apply compressed air to the rear of the radia-
tor.
Damage
Repair or replace.
Straighten any flattened fins with a thin, flat-
head screwdriver.
2. Check:

radiator hoses

radiator pipes
Cracks / damage
Replace.
3. Measure:

radiator cap opening pressure
Below the specified pressure
Replace the
radiator cap.
Radiator cap opening pressure
108
137 kPa
(1.08
1.37 kg / cm
2,
1.0
1.3 bar, 15.6
19.9 psi)
a. Install the radiator cap tester
1 and radiator
cap tester adapter
2 to the radiator cap 3.
Radiator cap tester
90890-01325, YU-24460-01
Radiator cap tester adapter
90890-01352, YU-33984
b. Apply the specified pressure for ten seconds
and make sure there is no drop in pressure.
4. Check:

radiator fan
Damage
Replace.
Malfunction
Check and repair.
Refer to “COOLING SYSTEM” in chapter 8.
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6-4
RADIATORCOOL
EAS00456
INSTALLING THE RADIATOR
1. Fill:

cooling system
(with the specified amount of the recom-
mended coolant)
Refer to “CHANGING THE COOLANT” in
chapter 3.
2. Check:

cooling system
Leaks
Repair or replace any faulty part.
3. Measure:

radiator cap opening pressure
Below the specified pressure
Replace the
radiator cap.
Refer to “CHECKING THE RADIATOR”.
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