Replacing The Throttle Bodies; Installing The Primary Injectors; Checking The Injector Pressure - Yamaha R1 Series 2015 Service Manual

bodies.
Refer to "SYNCHRONIZING THE THROT-
TLE BODIES" on page 3-9.
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
Use the diagnostic code number "67".
Refer to "SELF-DIAGNOSTIC FUNCTION
AND DIAGNOSTIC CODE TABLE (ECU)" on
page 9-5.
4. Adjust:
• Throttle bodies synchronizing
Refer to "SYNCHRONIZING THE THROT-
TLE BODIES" on page 3-9.
5. Place the vehicle on a suitable stand so that
the rear wheel is elevated.
6. Check:
• Engine idling speed
Start the engine, warm it up, and then mea-
sure the engine idling speed.
Engine idling speed
1200–1400 r/min
EAS31669

INSTALLING THE PRIMARY INJECTORS

ECA21550
NOTICE
• 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
same position as the removed cylinder.
• 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 seal onto the end of each injec-
tor.
2. Install the injectors "1" to the fuel rails "2".
3. Install the primary injector joint "3", making
sure to install them in the correct direction.
4. Install the injector assemblies to the throttle
bodies.
Fuel rail screw (throttle body)
3.5 Nm (0.35 m·kgf, 2.5 ft·lbf)
1
5. Check the injector pressure after the injectors
are installed.
Refer to "CHECKING THE INJECTOR
PRESSURE" on page 7-14.
EAS30481

CHECKING THE INJECTOR PRESSURE

TIP
• After installing the injectors, perform the follow-
ing steps to check the injector pressure.
• Do not allow any foreign materials to enter the
fuel lines.
1. Check:
• Injector pressure
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Connect the fuel injector pressure adapter "1"
to the injector joint "2", and then connect an
air compressor "3" to the adapter.
b. Connect the pressure gauge "4" to the fuel in-
jector pressure adapter "1".
Pressure gauge
90890-03153
Pressure gauge
YU-03153
Fuel injector pressure adapter
90890-03210
Fuel injector pressure adapter
YU-03210
7-14
THROTTLE BODIES
2
3
1
1
1
2