Checking The Exhaust System - Yamaha 2013 FJR1300AS Service Manual

Adjusting the throttle body synchronization
1. Remove the fuel tank bolts "1" and lift up the
fuel tank.
ECA1MC1024
NOTICE
When lifting up the fuel tank, be careful not
to pull the fuel tank breather/overflow hose.
2. Adjust:
• Throttle body synchronization
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a. Start the engine, warm it up for several min-
utes, and then let it run at the specified en-
gine idling speed.
Engine idling speed
1000–1100 r/min
b. Using the throttle body that has the bypass air
screw "1" with a white paint mark as the stan-
dard, adjust the other throttle bodies by turn-
ing its bypass air screw in or out.
ECA1MC1013
NOTICE
Do not turn the bypass air screw (white paint
mark) of the throttle body that is the stan-
dard. Otherwise, the engine may run roughly
at idle and the throttle bodies may not oper-
ate properly.
TIP
• Turn the bypass air screw using the carburetor
angle driver.
• After each step, rev the engine two or three
times, each time for less than a second, and
check the synchronization again.
• If a bypass air screw was removed, turn the
screw in fully and be sure to synchronize the
throttle bodies.
• If the throttle body synchronization can not be
adjusted using the bypass air screw, clean or
replace the throttle bodies.
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PERIODIC MAINTENANCE
• The difference in vacuum pressure between
the throttle bodies should not exceed 1.33 kPa
(10 mmHg).
1
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3. Stop the engine and remove the measuring
equipment.
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4. Install:
• Caps
5. Install:
• T-bar
Refer to "GENERAL CHASSIS" on page 4-1.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Rider seat
Refer to "GENERAL CHASSIS" on page 4-1.
6. Adjust:
• Throttle grip free play
Refer to "CHECKING THE THROTTLE GRIP
OPERATION" on page 3-33.
EAS21080

CHECKING THE EXHAUST SYSTEM

The following procedure applies to all of the ex-
haust pipes and gaskets.
1. Remove:
• Side cowlings
Refer to "GENERAL CHASSIS" on page 4-1.
2. Check:
• Exhaust pipe assembly "1"
• Mufflers "2"
Cracks/damage → Replace.
• Gaskets "3", "4"
Exhaust gas leaks → Replace.
3. Check:
Tightening torque
• Exhaust pipe assembly nuts "5"
3-9
Carburetor angle driver 2
90890-03173
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Throttle grip free play
1.0–3.0 mm (0.04–0.12 in)
1
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