Instructions; Pilot Screw Adjustment - Honda 2005-2008 RX500 FA Service Manual

'61HN252' by American Honda Motor Co. - Page 131 of 540
[2005-2008] [TRX500 FA/FGA]

PILOT SCREW ADJUSTMENT

Damage to the pilot
screw seat will
occur if the pilot
screw is tightened
against the seat.
1 of 1
Route the carburetor heater wire and carburetor
drain hose properly (page 1-22).
Connect the carburetor heater connector.
Install the air cleaner housing (page 5-5).
Perform the following inspections and adjustments:
engine idle speed (page 3-15)
throttle operation (page 3-5)
pilot screw if it was replaced (page 5-19)
Perform the initial setting (page 24-6) after all carbu-
retor adjustments have been completed.
IDLE DROP PROCEDURE
· The pilot screw is factory pre-set and no adjust-
ment is necessary unless the pilot screw is
replaced.
· Use a tachometer with graduations of 50 rpm
(min ) or smaller that will accurately indicate a
-1
50 rpm (min ) change.
-1
1. Remove the recoil starter cover (page 2-4).
Turn the pilot screw clockwise until it seats
lightly, then back it out to the specification given.
This is an initial setting prior to the final pilot
screw adjustment.
TOOL:
Pilot screw wrench 07KMA-MN90101 or
07KMA-MN9A100
(U.S.A.only)
INITIAL OPENING: A,CM type: 2 turns out
U type:
2. Warm up the engine to operating temperature.
Stop and go riding for 10 minutes is sufficient.
3. Stop the engine and connect a tachometer
according to the tachometer manufacturer's

instructions.

4. Start the engine and adjust the idle speed with
the throttle stop screw.
IDLE SPEED: 1,400 ± 100 rpm (min )
-1
5. Turn the pilot screw in or out slowly to obtain the
highest engine speed.
6. Lightly open the throttle 2--3 times, then adjust
the idle speed with the throttle stop screw.
7. Turn the pilot screw in gradually until the engine
speed drops by 100 rpm (min ).
-1
8. Turn the pilot screw out to the final opening.
FINAL OPENING: 3/4 turn out from the position
obtained step #7
9. Readjust the idle speed with the throttle stop
screw.
http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
1-3/4 turns out
FUEL SYSTEM
CARBURETOR HEATER
2P CONNECTOR
PILOT SCREW WRENCH
THROTTLE STOP SCREW
5-19
3/9/2008 10:46 PM