Yamaha MBK MW125 2014, Service Manual

Page: 293 / 380

THROTTLE BODY
7-10
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a. Use a rag soaked in the recommended clean-
ing agent to wipe off any deposits and foreign
materials.
NOTICE
ECA21790
• Be sure to use the recommended cleaning
agent.
• Do not spray the cleaning agent directly
onto the ISC unit or throttle body and do
not immerse them in the cleaning agent.
• To prevent scratching the components, do
not use a brush, metal file, or other abra-
sive tool.
• Do not clean with compressed air.
• Do not allow the removed deposits or for-
eign materials to adhere to the sealing sur-
faces of the O-ring.
• Do not scratch or deform the ISC valve or
air passage; otherwise, poor starting per-
formance, an unstable engine idling speed,
or uncontrollable engine speed could re-
sult.
• Do not clean any areas other than the areas
“a”, “b”, and “c”. If the cleaning agent en-
ters the ISC unit or throttle body, thorough-
ly wipe it off.
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7. Adjust the ISC unit plunger to the specified
distance “a” from the motor assembly body.
8. Install:
• ISC (idle speed control) unit “1”
• O-ring “2”
• Spring
NOTICE
ECA21800
• Do not use the ISC unit if it was dropped.
• Do not allow water to enter the ISC unit and
do not allow foreign materials to adhere to
the assembly.
• Do not touch the terminals of the coupler
directly.
• Because the force of the spring may push
out the ISC unit unexpectedly, be sure to
hold the motor assembly when installing
the components.
TIP
• Install the new O-ring until it contacts the raised
portion of the ISC unit body.
• When installing the ISC unit, be sure to align
the oval portion “a” of the ISC unit with the oval
hole “b” in the throttle body.
Recommended cleaning agent
Yamaha oil & brake cleaner
a
b
c
Distance (a)
0–3 mm (0–0.12 in)
a
New