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...

ENGINE
3-9
2. Adjust:
 Throttle cable free play
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲...

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...

ENGINE
3-11
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
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 →...

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.
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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...

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...

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
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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....

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...

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:
...

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
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Turn the main switch ON
b. Check that the EXUP valve operates prop-
erly
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
4. Check:
 EXUP...