Yamaha YZF-R1B 2012 Service Manual page 384

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ECA14B1029
• Do not use a tool, such as a wire brush, to
remove the carbon deposits; otherwise,
the inside of the throttle bodies may be
damaged.
• Do not allow carbon deposits or other for-
eign materials to enter any of the pas-
sages in each throttle body or in the
space between the throttle valve shaft
and the throttle body.
f. After removing the carbon deposits, clean
the inside of the throttle bodies with a
petroleum-based solvent, and then dry the
throttle bodies using compressed air.
g. Make sure that there are no carbon depos-
its or other foreign materials in any of the
passages "a" in each throttle body or in the
space "b" between the throttle valve shaft
and the throttle body.
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3. Adjust:
• Throttle bodies synchronizing
Out of specification → Replace the throt-
tle bodies.
Refer to "SYNCHRONIZING THE
THROTTLE BODIES" on page 3-9.
EAS14B1111
INSTALLING THE PRIMARY INJECTORS
ECA14B1046
• Always use new O-rings.
• When checking the injectors, do not allow
any foreign material to enter or adhere to
the injectors, fuel rails, or O-rings.
• Be careful not to twist or pinch the O-
rings when installing the injectors.
• When installing the injector, install it at
the same position as the removed cylin-
der.
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THROTTLE BODIES
• If an injector is subject to strong shocks
or excessive force, replace it.
• If installing the original fuel rails and
bolts, remove the white paint marks using
a cleaning solvent. Otherwise, paint chips
on the bolt seats could prevent the bolts
from being tightened to the specified
torque.
1. Install a new seal onto the end of each
injector.
2. Install the injectors "1" to the fuel rails "2".
3. Install the primary injector joint "3", making
sure to install them in the correct direction.
4. Install the injector assemblies to the throttle
bodies.
Fuel rail screw
3.5 Nm (0.35 m·kgf, 2.5 ft·lbf)
5. Check the injector pressure after the injec-
tors are installed to the throttle bodies.
Refer to "CHECKING THE INJECTOR
PRESSURE" on page 7-17.
EAS14B1112
CHECKING THE INJECTOR PRESSURE
TIP
• After installing the injectors, perform the fol-
lowing steps to check the injector pressure.
• Do not allow any foreign materials to enter
the fuel lines.
1. Check:
• Injector pressure
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a. Connect the injector pressure adapter "1"
to the primary injector joint "2", and then
connect an air compressor "3" to the
adapter.
b. Connect the pressure gauge "4" to the
injector pressure adapter "1".
7-17