Yamaha Yzf R1 2007 Manual

							ENGINE
3-8
NOTE:
 If more than one throttle body has a bypass 
air screw with a white paint mark, use the 
one with the lowest vacuum pressure as the 
standard.
 After each step, rev the engine two or three 
times, each time for less than a second, and 
check the synchronization again.
 If an air screw was removed, turn the screw 
3/4 turn in and be sure to synchronize the 
throttle body.
NOTE:
 The difference in vacuum pressure between 
two throttle bodies should not exceed 1.33 
kPa (10 mmHg).
 If you are unable to adjust the throttle body 
synchronization using this procedure, use 
the following procedure instead.
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Alternate procedure
NOTE:
Use this alternate procedure if you are unable 
to adjust the throttle body synchronization 
using the basic procedure.
a. Start the engine, warm it up for several 
minutes, and then let it run at the specified 
engine idling speed.
b. Turn all of the bypass air screws in fully.
c. Using the throttle body with the lowest vac-
uum pressure as the standard, turn out the 
bypass air screws of the other throttle bod-
ies to adjust them.
NOTE:
 Do not turn out the bypass air screw of the 
throttle body with the lowest vacuum pres-
sure.
 After each step, rev the engine two or three 
times, each time for less than a second, and 
check the synchronization again. If an air screw was removed, turn the screw 
3/4 turn in and be sure to synchronize the 
throttle body.
NOTE:
The difference in vacuum pressure between 
two throttle bodies should not exceed 1.33 kPa 
(10 mmHg).
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9. Stop the engine and remove the measuring 
equipment.
10. Adjust:
 Throttle cable free play
Refer to ADJUSTING THE THROTTLE 
CABLE FREE PLAY on page 3-8.
11. Install:
Fuel tank
 Fuel tank side cover
Refer to FUEL TANK on page 7-1.
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
EAS20630
ADJUSTING THE THROTTLE CABLE FREE 
PLAY
NOTE:
Prior to adjusting the throttle cable free play, 
the carburetor synchronization should be 
adjusted properly.
1. Check:
 Throttle cable free play “a”
Out of specification → Adjust.
Intake vacuum
22.0 kPa (6.5 inHg) (165
mmHg)
Engine idling speed
1150–1250 r/min
Intake vacuum
22.0 kPa (6.5 inHg) (165
mmHg)
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in) 
						

							ENGINE
3-9
2. Adjust:
 Throttle cable free play
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Handlebar side
a. Loosen the locknut “1”.
b. Turn the adjusting nut “2” in direction “a” or 
“b” until the specified throttle cable free 
play is obtained.
c. Tighten the locknut “1”.
WARNING
EWA4C81006
After adjusting the throttle cable free play, 
start the engine and turn the handlebars to 
the right and to the left to ensure that this 
does not cause the engine idling speed to 
change.
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EAS20680
CHECKING THE SPARK PLUGS
The following procedure applies to all of the 
spark plugs.
1. Remove:
 Side cowlings
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1.
2. Remove:
 Radiator upper bolts
 Radiator lower bolt
Refer to RADIATOR on page 6-1.
3. Disconnect:
 Ignition coils4. Remove:
 Spark plugs
CAUTION:
ECA13320
Before removing the spark plugs, blow 
away any dirt accumulated in the spark 
plug wells with compressed air to prevent it 
from falling into the cylinders.
5. Check:
 Spark plug type
Incorrect → Change.
6. Check:
 Electrode “1”
Damage/wear → Replace the spark plug.
 Insulator “2”
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
7. Clean:
 Spark plugs
(with a spark plug cleaner or wire brush)
8. Measure:
 Spark plug gap “a”
(with a wire thickness gauge)
Out of specification → Regap.
9. Install:
 Spark plugs
 Ignition coils
NOTE:
Before installing the spark plug, clean the 
spark plug and gasket surface.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
Direction “a”
Throttle cable free play is increased.
Direction “b”
Throttle cable free play is decreased.Manufacturer/model
NGK/CR9EK
Spark plug gap
0.6–0.7 mm (0.024–0.028 in)
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb) 
						

							ENGINE
3-10
10. Install:
 Radiator upper bolts
 Radiator lower bolt
Refer to RADIATOR on page 6-1.
11. Install:
 Side cowlings
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1.
EAS20710
MEASURING THE COMPRESSION PRES-
SURE
The following procedure applies to all of the 
cylinders.
NOTE:
Insufficient compression pressure will result in 
a loss of performance.
1. Measure:
 Valve clearance
Out of specification → Adjust.
Refer to ADJUSTING THE VALVE 
CLEARANCE on page 3-4.
2. Start the engine, warm it up for several 
minutes, and then turn it off.
3. Disconnect:
 Ignition coils
4. Remove:
 Ignition coils
 Spark plugs
CAUTION:
ECA13340
Before removing the spark plugs, use com-
pressed air to blow away any dirt accumu-
lated in the spark plug wells to prevent it 
from falling into the cylinders.
5. Install:
 Compression gauge “1”
 Extension6. Measure:
 Compression pressure
Out of specification → Refer to steps (c) 
and (d).
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a. Set the main switch to “ON”.
b. With the throttle wide open, crank the 
engine until the reading on the compres-
sion gauge stabilizes.
WARNING
EWA4C81007
To prevent sparking, ground all speak plug 
leads before cranking the engine.
NOTE:
The difference in compression pressure 
between cylinders should not exceed 100 kPa 
(1 kg/cm², 14 psi).
c. If the compression pressure is above the 
maximum specification, check the cylinder 
head, valve surfaces and piston crown for 
carbon deposits.
Carbon deposits → Eliminate.
d. If the compression pressure is below the 
minimum specification, pour a teaspoonful 
of engine oil into the spark plug bore and 
measure again.
Refer to the following table.
Compression gauge
90890-03081
Engine compression tester
YU-33223
Extension
90890-04136
Standard compression pres-
sure (at sea level)
1480 kPa/350 r/min (210.5 psi/
350 r/min) (14.8 kgf/cm²/350 r/
min)
Minimum–Maximum
1290–1660 kPa (183.5–236.1
psi) (12.9–16.6 kgf/cm²) 
						

							ENGINE
3-11
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7. Install:
 Spark plugs
 Ignition coils
8. Connect:
 Ignition coils
EAS20730
CHECKING THE ENGINE OIL LEVEL
1. Stand the vehicle on a level surface.
NOTE:
 Place the vehicle on a suitable stand.
 Make sure the vehicle is upright.
2. Start the engine, warm it up for several 
minutes, 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.
CAUTION:
ECA13360
 Engine oil also lubricates the clutch and 
the wrong oil types or additives could 
cause clutch slippage. Therefore, do not 
add any chemical additives.
 Do not allow foreign materials to enter the 
crankcase.
4. Start the engine, warm it up for several 
minutes, and then turn it off.
5. Check the engine oil level again.
NOTE:
Before checking the engine oil level, wait a few 
minutes until the oil has settled.
EAS20790
CHANGING THE ENGINE OIL
1. Start the engine, warm it up for several 
minutes, and then turn it off.
2. Place a container under the engine oil drain 
bolt.
3. Remove:
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1.
4. Remove:
 Engine oil filler cap “1”
 Engine oil drain bolt “2”
(along with the gasket) Compression pressure (with oil applied into 
the cylinder)
Reading Diagnosis
Higher than without 
oilPiston ring(s) wear or 
damage → Repair.
Same as without oil Piston, valves, cylin-
der head gasket or 
piston possibly defec-
tive → Repair.
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
Ty p e
YAMALUBE 4, SAE 10W30 or
SAE 20W40
Recommended engine oil grade
API service, SG type or higher,
JASO standard MA 
						

							ENGINE
3-12
5. Drain:
 Engine oil
(completely from the crankcase)
6. If the oil filter cartridge is also to be 
replaced, perform the following procedure.
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a. Remove the oil filter cartridge “1” with an oil 
filter wrench “2”.
b. Lubricate the O-ring “3” of the new oil filter 
cartridge with a thin coat of engine oil.
CAUTION:
ECA13390
Make sure the O-ring “3” is positioned cor-
rectly in the groove of the oil filter car-
tridge.c. Tighten the new oil filter cartridge to speci-
fication with an oil filter wrench.
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7. Check:
 Engine oil drain bolt gasket 
8. Install:
 Engine oil drain bolt
(along with the gasket)
9. Fill:
 Crankcase
(with the specified amount of the recom-
mended engine oil)
10. Install:
 Engine oil filler cap
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1.
11. Start the engine, warm it up for several 
minutes, and then turn it off.
12. Check:
Engine
(for engine oil leaks)
Oil filter wrench
90890-01426
YU-38411
Oil filter cartridge
17 Nm (1.7 m·kg, 12 ft·lb)
Engine oil drain bolt
43 Nm (4.3 m·kg, 31 ft·lb)
Engine oil quantity
Total amount
3.83 L (4.05 US qt) (3.37
Imp.qt)
Without oil filter cartridge
replacement
2.90 L (3.07 US qt) (2.55
Imp.qt)
With oil filter cartridge replace-
ment
3.10 L (3.28 US qt) (2.73
Imp.qt)
New 
						

							ENGINE
3-13
13. Check:
 Engine oil level
Refer to CHECKING THE ENGINE OIL 
LEVEL on page 3-11.
EAS20820
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 
minutes, and then turn it off.
CAUTION:
ECA13410
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:
 Main gallery bolt “1”
WARNING
EWA12980
The engine, muffler and engine oil are 
extremely hot.
4. Install:
 Oil pressure gauge “1”
 Adapter “2”5. Measure:
 Engine oil pressure
(at the following conditions)
Out of specification → Adjust.
6. Install:
 Main gallery boltCAUTION:
ECA4C81014
Be careful to tighten too much.
Pressure gauge
90890-03153
YU-03153
Oil pressure adapter H
90890-03139
Engine oil pressure
230 kPa (2.3 psi) (32.71 kgf/
cm²)
Engine speed
Approx 5000r/min
Oil temperature
80.0–90.0 °C (176.00–194.00
°F)
Engine oil pressure Possible causes
Below specification  Faulty oil pump
 Clogged oil filter
 Leaking oil passage
 Broken or damaged 
oil seal
Above specification  Leaking oil passage
 Faulty oil filter
 Oil viscosity too 
high
Main gallery bolt
8 Nm (0.8 m·kg, 5.8 ft·lb) 
						

							ENGINE
3-14
EAS20870
ADJUSTING THE CLUTCH CABLE FREE 
PLAY
1. Check:
 Clutch cable free play “a”
Out of specification → Adjust.
2. Adjust:
 Clutch cable free play
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Handlebar side
a. Turn the adjusting bolt “1” in direction “b” or 
“c” until the specified clutch cable free play 
is obtained.
b. Tighten the locknut “1”.
NOTE:
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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Engine side
a. Loosen the locknuts “1”.
b. Turn the adjusting bolt “2” in direction “a” or 
“b” until the specified clutch cable free play 
is obtained.c. Tighten the locknuts “1”.
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EAS20960
REPLACING THE AIR FILTER ELEMENT
1. Remove:
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
 Fuel tank side covers
Fuel tank
Refer to FUEL TANK on page 7-1.
2. Remove:
 Air filter case cover “1”
Refer to GENERAL CHASSIS on page 4-
1.
3. Check:
 Air filter element “1”
Damage → Replace.
NOTE:
The air filter needs more frequent service if 
you are riding in unusually wet or dusty areas.
Clutch lever free play
10.0–15.0 mm (0.39–0.59 in)
Direction “b”
Clutch cable free play is increased.
Direction “c”
Clutch cable free play is decreased.
Direction “a”
Clutch cable free play is increased.
Direction “b”
Clutch cable free play is decreased.
Locknut
7 Nm (0.7 m·kg, 5.1 ft·lb) 
						

							ENGINE
3-15
4. Install:
 Air filter element
NOTE:
Install a new air filter element by fitting the pro-
jections 1 on the element into the slots in the 
air filter case.
CAUTION:
ECA4C81021
 Make sure that the air filter element is 
properly seated in the air filter case.
 Pay attention to handling of the products 
so that the projections is not deformed.
5. Install:
 Air filter case cover
CAUTION:
ECA4C81015
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 
throttle bodies synchronization, leading to 
poor engine performance and possible 
overheating.
NOTE:
When installing the air filter element into the air 
filter case cover, make sure that the sealing 
surfaces are aligned to prevent any air leaks.
6. Install:
Fuel tank
 Fuel tank side covers
Refer to FUEL TANK on page 7-1.
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
EAS21010
CHECKING THE THROTTLE BODY JOINTS
The following procedure applies to all of the 
throttle body joints and intake manifolds.
1. Remove:
 Throttle bodies
Refer to THROTTLE BODIES on page 7-
4.
2. Check:
 Throttle body joints “1”
Cracks/damage → Replace.
3. Install:
 Throttle bodies
Refer to THROTTLE BODIES on page 7-
4.
EAS21030
CHECKING THE FUEL LINE
The following procedure applies to all of the 
fuel, vacuum and breather hoses.
1. Remove:
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
 Fuel tank side covers
Fuel tank
Refer to FUEL TANK on page 7-1.
2. Check:
Fuel hose “1”
 Breather hose “2”
Cracks/damage → Replace.
Loose connection → Connect properly.
1. Projection 1
2. Projection 2
3. Slot 
						

							ENGINE
3-16
NOTE:
Before removing the fuel hoses, place a few 
rags in the area under where it will be remov-
ing.
CAUTION:
ECA14940
Make sure the fuel tank breather hose is 
routed correctly.
3. Install:
 Fuel tank
 Fuel tank side covers
Refer to FUEL TANK on page 7-1.
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
CAUTION:
ECA4C81016
To install the fuel tank, check that the 
breather hose is not folded or pinched by 
the fuel tank.
EAS21070
CHECKING THE CRANKCASE BREATHER 
HOSE
1. Remove:
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
 Fuel tank side covers
 Fuel tank
Refer to FUEL TANK on page 7-1.
2. Check:
 Crankcase breather hose “1”
Cracks/damage → Replace.
Loose connection → Connect properly.
CAUTION:
ECA13450
Make sure the crankcase breather hose is 
routed correctly.3. Install:
Fuel tank
 Fuel tank side covers
Refer to FUEL TANK on page 7-1.
 Rider seat
Refer to GENERAL CHASSIS on page 4-
1.
CAUTION:
ECA4C81016
To install the fuel tank, check that the 
breather hose is not folded or pinched by 
the fuel tank.
EAS21080
CHECKING THE EXHAUST SYSTEM
The following procedure applies to all of the 
exhaust pipes and gaskets.
1. Check:
 Exhaust pipe “1”
 Exhaust valve pipe “2”
 Muffler “3”
Cracks/damage → Replace.
Gasket “4”
Exhaust gas leaks → Replace.
 Catalist pipe “5”
Cracks/damage → Replace.
2. Check:
 Tightening torque
 Exhaust pipe nut “6”
 Exhaust pipe and exhaust valve pipe bolt 
“7”
 Exhaust valve pipe and catalist pipe bolt “8”
 Catalist pipe bolt “9”
 Catalist pipe and muffler bolt “10”
 Muffler and frame bolt “11” 
						

							ENGINE
3-17
NOTE:
When installing the EXUP cables, make sure 
they are parallel and not twisted.
 Upper cable: White metal section “12”
 Lower cable: Black metal section “13”
EAS21100
ADJUSTING THE EXUP CABLES
1. Remove:
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1.
2. Remove:
 EXUP valve pulley cover “1”
3. Check:
 EXUP system operation
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a. Turn the main switch ON
b. Check that the EXUP valve operates prop-
erly
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4. Check:
 EXUP cable free play (at the EXUP valve 
pulley) “a”
5. Adjust:
 EXUP cable free play
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a. Turn the main switch to “ON”.
b. Check the EXUP pulley position.
c. Projection of the EXUP pulley position is 
between “1” and “2” .
d. Loosen the both locknuts “3” 
e. Turn the both adjusting nuts “4” in or out.
f. Tighten the both locknuts.
Exhaust pipe nut
20 Nm (2.0 m·kg, 14 ft·lb)
Exhaust pipe and exhaust valve 
pipe bolt
12 Nm (1.2 m·kg, 8.7 ft·lb)
Exhaust valve pipe and catalist 
pipe bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Catalist pipe bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Catalist pipe and muffler bolt
20 Nm (2.0 m·kg, 14 ft·lb)
Muffler and frame bolt
23 Nm (2.3 m·kg, 17 ft·lb)
Maximum EXUP cable free play 
(at the EXUP valve pulley)
Less than 3 mm (0.12 in)