Honda CBR125R, Owner'S Manual

Page: 139 / 430

FUEL SYSTEM (PGM-FI)
5-47
5. Connect the fuel pump 5P (Natural) connector.
Connect the battery negative (–) cable (page 16-
5).
6. Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
• Do not start the engine.
The fuel pump will run for about 2 seconds, and
fuel pressure will rise.
Repeat 2 or 3 times, and check that there is no
leakage in the fuel supply system.
Turn the ignition switch OFF.
Remove the suitable support and close the fuel
tank (page 3-6).
FUEL PRESSURE TEST
Relieve the fuel pressure and disconnect the quick
connect fitting (page 5-44).
Attach the fuel pressure gauge, attachments and
manifold.
Temporarily connect the battery negative (–) cable
and fuel pump 5P connector.
Turn the ignition switch ON (and engine stop switch
" ": CM and U type).
Start the engine and let it idle.
Read the fuel pressure.
If the fuel pressure is higher than specified, replace
the fuel pump assembly.
If the fuel pressure is lower than specified, inspect
the following:
– Fuel line leaking
– Pinched or clogged fuel feed hose or fuel tank
breather hose
– Fuel pump unit (page 5-48)
– Clogged fuel filter (Assembly of the fuel pump
unit: page 5-49)
After inspection, relieve the fuel pressure (page 5-
44).
Remove the fuel pressure gauge, attachment and
manifold from the fuel pump.
Connect the quick connect fitting (page 5-46).
5P (NATURAL) CONNECTOR
TOOLS:
(1): Fuel pressure gauge
07406-0040004
(2): Pressure gauge manifold 07ZAJ-S5A0111
(3): Hose attachment, 9 mm/9 mm
07ZAJ-S5A0120
(4): Hose attachment, 6 mm/9 mm
07ZAJ-S5A0130
(5): Attachment joint, 6 mm/9 mm
07ZAJ-S5A0150
Standard: 294 kPa (3.0 kgf/cm
2
, 43 psi)
(1)
(2)
(3)
(4)
(5)