Yamaha R1 Series 2015, Service Manual, Page: 466 / 704

THROTTLE BODIES
7-13
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a. Place the throttle bodies on a flat surface with
the air filter case side facing up.
b. Install the caps (895-14169-00) onto the hose
fittings “a”.
c. Hold the throttle valves in the open position.
WARNING
EWA15940
When cleaning the throttle bodies, be careful
not to injure yourself on the throttle valves or
other components of the throttle bodies.
NOTICE
ECA20380
• Do not open the throttle valves by supply-
ing electrical power to the throttle bodies.
• Do not use tools to open the throttle valves
or to keep them in the open position.
• Do not open the throttle valves quickly.
d. Apply the recommended cleaning solvent to
the throttle valves and the inside of the throt-
tle bodies to remove any carbon deposits.
TIP
• Do not allow any cleaning solvent to enter the
opening for the injectors.
• Do not apply any cleaning solvent to the por-
tions 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.
NOTICE
ECA17590
• Do not use a tool, such as a wire brush, to
remove the carbon deposits; otherwise, the
inside of the throttle bodies may be dam-
aged.
• Do not allow carbon deposits or other for-
eign materials to enter any of the passages
in each throttle body or in the space be-
tween the throttle valve shaft and the throt-
tle body.
f. After removing the carbon deposits, clean the
inside of the throttle bodies with the recom-
mended cleaning solvent, and then dry the
throttle bodies using compressed air.
g. Make sure that there are no carbon deposits
or other foreign materials in any of the pas-
sages “a” in each throttle body or in the space
“b” between the throttle valve shaft and the
throttle body.
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3. Install the throttle bodies.
4. Reset:
• ISC (Idle Speed Control) learning values
Use the diagnostic code number “67”.
Refer to “SELF-DIAGNOSTIC FUNCTION
AND DIAGNOSTIC CODE TABLE (ECU)” on
page 9-5.
5. Adjust:
• Throttle bodies synchronizing
Out of specification
o
Replace the throttle
a
a
a
a
a
b