THROTTLE BODY
7-9
EAS37P1074
REMOVING THE FUEL HOSE
1. Extract the fuel in the fuel tank through the
fuel tank filler hole with a pump.
2. Remove:
• Fuel hose connector cover “1”
3. Disconnect:
• Fuel hose “2”
NOTICE
ECA37P1025
• Be sure to disconnect the fuel hose by
hand. Do not forcefully disconnect the
hose with tools.
• Although the fuel has been removed from
the fuel tank, be careful when removing the
fuel hose, since there may be fuel remain-
ing in it.
• Do not disconnect the fuel hose from the
fuel hose connector. Disconnect the con-
nector from the fuel pump.
IP
Before removing the hose, place a few rags in
the area under where it will be removed.
EAS26980
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
Obstructions → 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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3. Check: (YP250R only)
• Piston valve
Damage/scratches/wear → Replace.
• Piston valve diaphragm
Cracks/tears → Replace.
4. Check: (YP250R only)
• Vacuum chamber cover
• Piston valve spring
Cracks/damage → Replace.
5. Check: (YP250R only)
• Piston valve movement
Insert the piston valve into the throttle body
and move it up and down.
Tightness → Replace the piston valve.
EAS37P1116
INSTALLING THE INTAKE MANIFOLD
(YP125R)
1. Install:
• Intake manifold joint “1”
• Intake manifold “2”
IP
Make sure that the projection “a” on the intake
manifold joint is facing down.
EAS37P1073
INSTALLING THE INTAKE MANIFOLD
(YP250R)
1. Install:
• Intake manifold joint “1”
1
2
a
2
1
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