Yamaha YZF-R125, Service Manual

Page: 261 / 356

THROTTLE BODY
7-6
EAS5D71025
REMOVING THE THROTTLE BODY
1. Extract the fuel in the fuel tank through the
fuel tank filler hole with a pump.
2. Disconnect:
• Fuel hose
WARNING
EWA5D71003
Cover the fuel hose connections with a cloth
when disconnecting them. Residual pres-
sure in the fuel lines could cause fuel to
spurt out when removing the hoses.
NOTE:
• To remove the fuel hose from the fuel injector,
slide the fuel hose connector cover “1” on the
end of the hose in the direction of the arrow
shown, press the two buttons “2” on the sides
of the connector, and then remove the hose.
• Remove the fuel hose manually without using
any tools.
• Before removing the hose, place a few rags in
the area under where it will be removed.
3. Remove:
• Throttle body
CAUTION:
ECA5D71016
Do not remove the throttle body sensor as-
sembly “1” from the throttle body.
EAS5D71028
CHECKING THE FUEL INJECTOR
1. Check:
• Fuel injector
Damage
→
Replace.
EAS26990
CHECKING THE THROTTLE BODY
1. Check:
• Throttle body
Cracks/damage
→
Replace the throttle body.
2. Check:
• Fuel passages
Obstruction
→
Clean.
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a. Wash the throttle body in a petroleum-based
solvent.
Do not use any caustic carburetor cleaning
solution.
b. Blow out all of the passages with compressed
air.
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EAS5D71006
INSTALLING THE THROTTLE BODY
1. Install:
• Throttle body joint clamps
NOTE:
Align the projections “a” on the throttle body joint
with the slot “b” in each throttle body joint clamp.
2. Install:
• Throttle body joint
NOTE:
Align the projection “a” on the throttle body joint
with the slot “b” in the intake manifold.
1
2
1
b
a
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