Synchronizing The Throttle Bodies - Yamaha YZF-R1 2007 Service Manual

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EAS20570

SYNCHRONIZING THE THROTTLE BODIES

NOTE:
Prior to synchronizing the throttle bodies, the
valve clearance should be properly adjusted
and the ignition timing should be checked.
1. Stand the vehicle on a level surface.
NOTE:
Place the vehicle on a suitable stand.
2. 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.
• Air filter case
Refer to "GENERAL CHASSIS" on page 4-
1.
3. Remove:
• Synchronizing hoses "1"
4. Install:
• Vacuum gauge "1"
(onto the synchronizing hose)
Vacuum gauge
90890-03094
Carburetor synchronizer
YU-44456
email: info@motomatrix.co.uk
5. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
6. Start the engine and let it warm up for sev-
eral minutes.
7. Check:
• Engine idling speed
Engine idling speed
1150–1250 r/min
8. Adjust:
• Throttle body synchronization
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
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 the bypass air screw "1" with a white
paint mark out a little, and then turn it in
fully.
c. Using the throttle body that has the bypass
air screw with a white paint mark as the
standard, turn the bypass air screws with-
out white paint marks in or out to the adjust
the other throttle bodies.
3-7
ENGINE