Yamaha MBK MW125 2014 Service Manual page 293

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a. Use a rag soaked in the recommended clean-
ing agent to wipe off any deposits and foreign
materials.
Recommended cleaning agent
Yamaha oil & brake cleaner
ECA21790
NOTICE
• 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.
a
b
c
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• 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
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ECA21800
NOTICE
• 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.
7-10
THROTTLE BODY
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Distance (a)
0–3 mm (0–0.12 in)
a
New
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