Yamaha 2009 YZF-R1Y, Service Manual

Page: 374 / 526

THROTTLE BODIES
7-17
d. Apply a petroleum-based solvent to the
throttle valves and the inside of the throttle
bodies to remove any carbon deposits.
TIP
• Do not allow any petroleum-based solvent to
enter the opening for the injectors.
• Do not apply any petroleum-based solvent to
the portions of the throttle valve shafts
between the throttle bodies.
e. Remove the carbon deposits from the
inside of each throttle body in a downward
direction, from the air filter case side of the
throttle body to the engine side.
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.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Adjust:
• Throttle bodies synchronizing
Out of specification
→
Replace the throt-
tle bodies.
Refer to “SYNCHRONIZING THE
THROTTLE BODIES” on page 3-9.
EAS14B4010
INSTALLING THE PRIMARY INJECTORS
ECA14B4002
• 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.
• 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.