Yamaha R1 2004 ServiceManual

3-24
CHECKING THE SPARK PLUGS /
MEASURING THE COMPRESSION PRESSURECHK
ADJ
13 Nm (1.3 m
kg, 9.4 ft
lb)
NOTE:
NOTE:
CAUTION:
8. Install:

spark plugs

ignition coils
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Install:

radiator upper bolts

radiator lower bolt
Refer to “RADIATOR” in chapter 6.
10. Install:

side cowlings

bottom cowlings
Refer to “COWLINGS”.
EAS00065
MEASURING THE COMPRESSION 
PRESSURE
The following procedure applies to all of the cyl-
inders....

3-25
MEASURING THE COMPRESSION PRESSURE
CHK
ADJ
WARNING
NOTE: 4. Install:

compression gauge 
1

adapter
Compression gauge
90890-03081, YU-33223
Adapter
90890-04136
5. Measure:

compression pressure
Out of specification 
 Refer to steps (c) and
(d).
Compression pressure 
(at sea level)
Minimum
1,290 kPa (12.90 kg / cm
2,
12.90 bar, 183.48 psi)
Standard
1,480 kPa (14.80 kg / cm
2,
14.80 bar, 210.5 psi)
Maximum
1,660 kPa (16.60 kg / cm
2,
16.60 bar, 236.11 psi)
a. Turn the main switch to “ON”.
b. With the...

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...

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. 

3-28
CHANGING THE ENGINE OIL
CHK
ADJ
NOTE:
CAUTION:
EAS00074
CHANGING THE ENGINE OIL
1. Start the engine, warm it up for several min-
utes, and then turn it off.
2. Place a container under the engine oil drain
bolt.
3. Remove:

bottom cowlings
Refer to “COWLINGS”.
4. Remove:

engine oil filler cap 
1
Remove the engine oil filler cap 1 with the spe-
cial wrench 
2 and cover 3.
5. Remove:

engine oil drain bolt 
1
(along with the gasket)
6. Drain:

engine oil
(completely from the crankcase)
7. If the oil...

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...

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...

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...

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”....

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...