Service Information - Honda CRF450R 2009 Service Manual

FUEL SYSTEM (PGM·FI)
SERVICE INFORMATION
GENERAL
Be sure to relieve the fuel pressure while the engine is OFF.
Bending or twisting the control cables will impair smooth operation and could cause the cables to slick or bind, resulting in loss
of vehicle control.
Work
In
a wen ventilated area. Smoking or allowing flames or sparks in
the work area or where gasoline is stored can cause a
fire or explosion .
Do
not snap the throttle valve from fully opened to fully dosed after the throttle cable has been removed. It may cause incorrect
idle operation.
Seal the cylinder head intake ports with tape or a clean cloth to keep dirt and debris from entering the intake ports after the
throttle body has been removed .
Do not damage the throttle body. It may cause incorrect throttle valve operation.
Prevent dirt and debris from entering the engine, dean the throttle bore and fuel hose with compressed air.
A faulty PGM-FI system is often related to poorly connected or corroded connectors. Check those connections before
proceeding.
Before disconnecting the fuel hose, relieve fuel pressure from the system by disconnecting the quick connect fitting (page 6-40).
Do not loosen or lighten the white painted bolts and screws of the throttle body. Loosening or tightening them can cause throttle
valve and idle control failure.
SPECIFICATIONS
ITEM SPECIFICATIONS
tion number '09
GOOOA
I Throttle body identifica
'10
GOD3A
'11 , ' 12
G025A
'13 - '14
G027A
-
"-After ' 14
G02BA
'09
1,750
±
100 rpm
f-'10_ '12
1,800
±
100 rpm
tdle speed"- -
After ' 12 2,000
±
100 rpm
Throttle grip free play
'09 '12
3 - 5 mm
(118 3116 in)
,-After '12
2-6mm(1f16 114 in)
• •
ECT sensor resistance
(a t20 i.C~/6:;;8
.... Ficl _______
+
2.3 2.6 kO
Fuel injector resistance (at
2~ 0 ~ ' C~/ ~ 6 ~ 8 = ' F ~ I = ~=::====~=:=;i~~rt~~~~ "~'66~-~'~ 2 ~ ' 4 ~O~~~~~~~;==j
Fuel pressure 333 -
360
kPa (3.4 - 3.7 kgflcm . 48 - 52 psi)
Fuel puml? flow (al12
V)
150
em '
(5.
1 US
oz, 5.3 Imp oz) minimuml10 seconds
TORQUE VALUES
ECT sensor
Air cleaner housing mounting bolt
Air deaner connecting boot band screw
(air cleaner side)
Insulator band screw (throtlle body side)
Fuel pump mounting bolt
Fast idle knob lock nut
Mud guard mounting screw ('09 - '12)
Throttle drum cover bolt
IA T sensor screw
MAP sensor screw
Fuel injector jOint bolt
Clampar stay screw
Throttle cable adjuster lock nut
Throttle cable bolt
('09 - '121
(After '12)
Shock absorber upper mounting nut
Air cleaner housing cover screw (,Og. '12)
6-4
12 N 'm (1.2 kgf-m, 9Ibf-ft)
10 N 'm ( 1.0 kgf-m, 71bHI.)
0.7 N ' m (0.1 kgf'm, 0.5Ibf·ft)
'09, '10:
See
page 6-68
After '10: See page 6-68
11 N 'm (1.1 kgf 'm, 8Ibf·ft)
2.3 N 'm (0.2 kgf'm, 1.7Ibf·ft)
1.1 N 'm (0.1 kgf-m, 0.8Ibf-ft)
3.4 N 'm (0.3 kgf'm, 2.5IbHt)
1.1 N 'm (0.1 kgf·m. 0.8IbOt)
1.5 N 'm (0.2 kgf'm, 1.1 IbHt)
4.9 N 'm (0.5 kgf'm, 3.6Ibf·ft)
5.1 N 'm (0.5 kgf-m, 3.8Ibfft)
3.4 N ' m (0.3 kgf'm, 2.SlbHt)
4.0 N 'm (0.4 kgf 'm, 3.0 IbHt)
4.0 N 'm (0.4 kgf'm, 3.0 Ibf.ft)
44 N 'm (4 .5 kgf'm , 32 Ibf-ft)
1.1 N 'm (0.1 kgf-m, 0 .8IbHI)
For tightening sequence (page 6-58)