'61HN252' by American Honda Motor Co. - Page 131 of 540
http://services.honda.com/ServiceManual/SVC_MNL/61HN253/61HN2...
1 of 1
3/9/2008 10:46 PM
[2005-2008] [TRX500 FA/FGA]
FUEL SYSTEM
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.
CARBURETOR HEATER
2P CONNECTOR
PILOT SCREW ADJUSTMENT
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
-1
) or smaller that will accurately indicate a
50 rpm (min
-1
) change.
1. Remove the recoil starter cover
(page 2-4).
Damage to the pilot
Turn the pilot screw clockwise until it seats
screw seat will
lightly, then back it out to the specification given.
occur if the pilot
This is an initial setting prior to the final pilot
screw is tightened
screw adjustment.
against the seat.
TOOL:
Pilot screw wrench 07KMA-MN90101 or
07KMA-MN9A100
(U.S.A.only)
INITIAL OPENING: A,CM type: 2 turns out
U type:
1-3/4 turns out
2. Warm up the engine to operating temperature.
PILOT SCREW WRENCH
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
THROTTLE STOP SCREW
screw.
5-19