Checking And Cleaning The Throttle Bodies - Yamaha 2009 Diversion XJ6S Service Manual

the injector.
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EAS2S31095
CHECKING AND CLEANING THE THROTTLE
BODIES
EWA2S31033
WARNING
If the throttle bodies are subjected to strong
shocks or dropped during cleaning, replace
them as a set.
TIP
Clean the throttle bodies only if they cannot be
synchronized using the air screws. Before
cleaning the throttle bodies, check the following
items:
Valve clearance
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Spark plugs
G
Compression pressure
G
Air filter element
G
Throttle body joints
G
Fuel hoses
G
Air induction system
G
Exhaust system
G
Breather hoses
G
Throttle body hoses
G
Fast idle plunger inlet hose
G
Fast idle plunger outlet hose
G
1. Check:
Throttle bodies
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Cracks/damage → Replace the throttle bod-
ies as a set.
2. Clean:
Throttle bodies
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ECA2S31068
NOTICE
Observe the following precautions; other-
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wise, the throttle bodies may not operate
properly.
Do not open the throttle valves quickly.
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Do not subject the throttle bodies to exces-
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sive force.
Wash the throttle bodies in a petro-
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leum-based solvent.
Do not use any caustic carburetor cleaning
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solution.
Do not apply cleaning solvent directly to
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any plastic parts, sensors, or seals.
Do not directly push the throttle valves to
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open them.
Do not remove the bolts which not instruct-
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ed as so.
Do not touch the synchronizing screw "a";
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otherwise, the throttle body synchroniza-
tion will be affected.
Do not touch the throttle adjust screw "b".
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b
TIP
Check the synchronization after cleaning the
throttle body.
If they cannot be synchronized as specified, re-
place the throttle body assembly.
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a. Place the throttle bodies on a flat surface with
the engine side facing up.
b. Install the caps (18P-2464V-00) onto the
hose fittings "a".
c. Open the throttle valve using the throttle pul-
ley "b" holding that position.
EWA2S31034
WARNING
When cleaning the throttle bodies, be careful
not to injure yourself on the throttle valves or
other components of the throttle bodies.
a
d. Apply a petroleum-based solvent to the throt-
tle valves and the inside of the throttle bodies
to remove any carbon deposits.
TIP
Do not allow any petroleum-based solvent to
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enter the opening for the injectors.
Do not apply any petroleum-based solvent to
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7-8
THROTTLE BODIES
a
a
a
b