Removing The Fuel Hose (Injector Side); Checking The Injectors; Checking The Throttle Body; Installing The Injectors - Yamaha 2012 TMAX XP500A Service Manual

EAS59C1705
REMOVING THE FUEL HOSE (INJECTOR
SIDE)
1. Disconnect:
• Fuel hose (injector side)
EWA15910
WARNING
Cover 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 hose.
ECA17490
Be sure to disconnect the fuel hose by
hand. Do not forcefully disconnect the hose
with tools.
TIP
• To remove the fuel hose from the fuel rail,
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.
• Before removing the hose, place a few rags
in the area under where it will be removed.
EAS26981

CHECKING THE INJECTORS

1. Check:
• Injectors
Obstruction → Replace and check the
fuel pump/fuel supply system.
Deposit → Replace.
Damage → Replace.
2. Check:
• Injector resistance
Refer to "CHECKING THE FUEL INJEC-
TORS" on page 8-141.
EAS26990

CHECKING THE THROTTLE BODY

1. Check:
• Throttle body
Cracks/damage → Replace.
2. Check:
• Fuel passages
Obstructions → Clean.
ECA59C1703
Do not adjust the stop screw "1".
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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 com-
pressed air.
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EAS31930

INSTALLING THE INJECTORS

ECA59C1704
• Always use new gaskets, seals, and O-
rings.
• When installing the injectors, do not allow
any foreign material to enter or adhere to
the injectors, fuel rail, seals or O-rings.
• Be careful not to twist or pinch the O-
rings when installing the injectors.
• When installing the injector, install it at
the same position as the removed cylin-
der.
• If an injector is subject to strong shocks
or excessive force, replace it.
• If installing the original fuel rail and bolts,
remove the white paint marks using a
cleaning solvent. Otherwise, paint chips
on the bolt seats could prevent the bolts
from being tightened to the specified
torque.
1. Install a new O-ring onto the end of each
injector.
2. Install the injectors "1" to the fuel rail "2",
making sure to install them in the correct
direction.
7-8
THROTTLE BODY