Checking The Fuel Pressure - Yamaha R1 Series 2015 Service Manual

c. Close the valve on the injector pressure
adapter.
d. Apply air pressure with the air compressor.
e. Open the valve on the injector pressure
adapter until the specified pressure is
reached.
Specified air pressure
490 kPa (5.0 kgf/cm², 71.1 psi)
ECA17600
NOTICE
Never exceed the specified air pressure or
damage could occur.
f. Close the valve on the injector pressure
adapter.
g. Check that the specified air pressure is held
at least one minute.
Pressure drops
and adapter.
Check the seals and O-rings and then rein-
stall.
Out of specification
tors.
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
EAS30482

CHECKING THE FUEL PRESSURE

1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Fuel tank cover
Refer to "GENERAL CHASSIS (2)" on page
4-7.
2. Check:
• Fuel pressure
▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼▼
a. Remove the fuel tank bolts and hold up the
fuel tank.
b. Disconnect the fuel hose "1" from the fuel
pump.
Refer to "FUEL TANK" on page 7-1.
EWA17320
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
NOTICE
Be sure to disconnect the fuel hose by hand.
Do not forcefully disconnect the hose with
Check the pressure gauge
Replace the fuel injec-
tools.
c. Connect the pressure gauge "2" and fuel
pressure adapter "3" to the fuel hose.
Pressure gauge
90890-03153
Pressure gauge
YU-03153
Fuel pressure adapter
90890-03176
Fuel pressure adapter
YM-03176
2
d. Start the engine.
e. Measure the fuel pressure.
Faulty Replace the fuel pump.
Fuel line pressure at idling
300–390 kPa (3.0–3.9 kgf/cm²,
43.5–56.6 psi)
▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲▲
3. Install:
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Fuel tank cover
Refer to "GENERAL CHASSIS (2)" on page
4-7.
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
7-15
THROTTLE BODIES
1
3