Adjusting The Exhaust Gas Volume - Yamaha YZF-R1 2007 Service Manual

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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.
Intake vacuum
22.0 kPa (6.5 inHg) (165
mmHg)
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.
Engine idling speed
1150–1250 r/min
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.
email: info@motomatrix.co.uk
• If an air screw was removed, turn the screw
3/4 turn in and be sure to synchronize the
throttle body.
Intake vacuum
22.0 kPa (6.5 inHg) (165
mmHg)
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 3-9.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
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.
EAS20600

ADJUSTING THE EXHAUST GAS VOLUME

NOTE:
Be sure to set the CO density level to stan-
dard, and then adjust the exhaust gas volume.
1. Turn the main switch to "OFF" and set the
engine stop switch to "ON".
2. Simultaneously press and hold the
"SELECT" and "RESET" buttons, turn the
main switch to "ON", and continue to press
the buttons for 8 seconds or more.
3-8
ENGINE