Replacing The Throttle Bodies; Installing The Injectors - Yamaha TMAX 2020 Service Manual

TIP
• Do not allow any cleaning solvent to enter the
opening for the injectors.
• Do not apply any cleaning solvent to the por-
tions of the throttle valve shafts between the
throttle bodies.
e. Remove the carbon deposits from the in-
side of each throttle body in a downward di-
rection, from the air filter case side of the
throttle body to the engine side.
ECA17590
NOTICE
• Do not use a tool, such as a wire brush, to
remove the carbon deposits; otherwise, the
inside of the throttle bodies may be dam-
aged.
• Do not allow carbon deposits or other for-
eign materials to enter any of the passages
in each throttle body or in the space be-
tween the throttle valve shaft and the throt-
tle body.
f. After removing the carbon deposits, clean
the inside of the throttle bodies with the rec-
ommended cleaning solvent, and then dry
the throttle bodies using compressed air.
g. Make sure that there are no carbon depos-
its or other foreign materials in any of the
passages "a" in each throttle body or in the
space "b" between the throttle valve shaft
and the throttle body.
a
b
A. Air filter case side
B. Throttle body joint side
3. Install the throttle bodies.
4. Reset:
• ISC (idle speed control) learning value
Use the diagnostic code number "67".
Refer to "DIAGNOSTIC CODE: SENSOR
OPERATION TABLE" on page 9-58.
5. Adjust:
• Throttle bodies synchronizing
EAS31160

REPLACING THE THROTTLE BODIES

1. Remove the throttle bodies from the vehicle.
2. Install a new throttle bodies to the vehicle.
3. Reset:
• ISC (idle speed control) learning values
4. Adjust:
• Throttle bodies synchronizing
5. Place the vehicle on a maintenance stand so
6. Check:
• Engine idling speed
EAS30480

INSTALLING THE INJECTORS

ECA19400
NOTICE
a
• Always use new O-rings.
• When installing the injectors, do not allow
any foreign material to enter or adhere to
the injectors, fuel rails, 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
b
same position as the removed cylinder.
• If an injector is subject to strong shocks or
excessive force, replace it.
1. Install a new seal onto the end of each injec-
2. Install the injectors to the fuel rail, making
3. Install the injector assembly to the throttle
7-11
THROTTLE BODY
Out of specification  Replace the throttle
bodies.
Refer to "SYNCHRONIZING THE THROT-
TLE BODIES" on page 3-9.
Use the diagnostic code number "67".
Refer to "DIAGNOSTIC CODE: SENSOR
OPERATION TABLE" on page 9-58.
Refer to "SYNCHRONIZING THE THROT-
TLE BODIES" on page 3-9.
that the rear wheel is elevated.
Start the engine, warm it up, and then mea-
sure the engine idling speed.
Engine idling speed
1100–1300 r/min
tor.
sure to install them in the correct direction.
bodies.
Fuel rail bolt
3.5 N·m (0.35 kgf·m, 2.6 lb·ft)