Fuel System - Service Information; Fuel System - Specifications; Fuel System Torque Values - Honda TRX500FM Service Manual

FUEL SYSTEM
SERVICE INFORMATION
GENERAL
This section covers service of the mechanical system of the PGM-FI system and Ihe fuel supply system. For electrical system
service of the PGM-FI system, see PGM-FI System section (page 4-2).
Before disconnecting the fuel feed hose, relieve pressure from the system (page 7-6),
Bending or twisting the control cable will impa ir smooth operation and could cause the cable to slick or bend . resulting in loss of
vehicle control.
Work in a well ventilated area. Smoking or allowing flames or sparks in Ihe work area or where gasoline is stored can cause a
fire or explosion.
Do not snap the throttle valve from full open to full close after the throttle cable has been removed. It may cause incorrect idle
operation .
Seal the cylinder head intake port with tape or a dean cloth to keep dirt and debris from entering the intake port 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 throttle bore, IACV. sensor hole and fuel feed hose. Clean them using compressed air.
The throttle body is factory pre-set. Do not disassemble in a way other than shown in this manual.
Do not loosen or tighten the white painted screws and nut of the throttle body. Loosening or lightening them can cause throttle
body malfunction .
Tighten the yellow painted screws of the throtlle body to the specified torque.
When disassembling the fuel system parts . note the location of the O-rings. Replace them with new ones upon reassembly.
When servicing the fuel feed hose , be careful not to bend or kink it.
The engine stop switch line is connected to the PCM/ECM on this vehicle. Its signal permits the PCM/ECM to control the fuel
pump, fuel injector and ignition coil.
SPECIFICATIONS
ITEM
SPECIFICATIONS
,
Throttle body identification number
GQ3RA
Idle speed
1,400 ± 100 rpm
Throllie lever free play
,
3 -8 mm (0.1 0.3 in)
Fuel pressure at idle
316 - 387 kPa (3.2 - 3.9 kgffcm . 46 56 psi)
Fuel pump flow (at 12 V)
I
125 cm (4.2 US OZ, 4.4 Imp oz) minimumJ10 seconds
TORQUE VALUES
ITEM Q'TY
THREAD TORQUE
REMARKS
j
OIA. (mm) N'm (kgf'm,
IbHt)
Sub-fuel tank/fuel pump assembly bolt 6 6
8.B (0.9, 6 .5) See page 7-20
Fuel joint mounting bolt 2
6 9 .0 (0.9, 6.6)
Wire harness clamp slay screw 1
5 3.4 (0.3 . 2.5)
Fuel feed hose clamp slay screw
-1-' 5
3.4 (0 .3, 2.5)
Insulator band screw (Cylinder head side)
5
See page 7-25
1
1
Insulator band screw (Throllie body side) 1 5
See page 7-26
Throttle drum cover screw
t-:
4 1.8 (0.2 . 1.3)
IACV torx screw (T20) 2 4 2.1 (0.2 . 1.5)
Fuel injector mounting bolt 2
5 5.1 (0.5. 3.8)
7-3