Honda XL125LK, Owner'S Manual

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FUEL SYSTEM
PILOT SCREW ADJUSTMENT
• The pilot screw are factory pre-set. Adjustment is not
necessary unless the carburetor are overhauled or
new pilot screw are installed.
• Use a tachometer with graduations of 50 min
-1
(rpm)
or smaller that will accurately indicate a 50 min
-1
(rpm) change.
IDLE DROP PROCEDURE (XR125LK/
LEK)
1. Turn the pilot screw clockwise until it is lightly seated
then back it out the specification given.
This is an initial setting prior to the final pilot screw
adjustment.
• Damage to the pilot screw seat will occur if the pilot
screw is tightened to the seat.
2. Warm up the engine to operating temperature.
Stop and go riding for 10 minutes sufficient.
3. Stop the engine and connect a tachometer
according to the tachometer manufacturer’s
instructions.
4. Disconnect the PAIR control valve vacuum hose [1],
then connect the vacuum pump [2] and plug the
vacuum port.
Apply the specified vacuum to the PAIR control
valve vacuum hose more than 330 mm Hg.
5. Start the engine and adjust the idle speed with the
throttle stop screw [1].
6. Turn the pilot screw inward or outward slowly to
obtain the highest engine speed.
7. Lightly open the throttle 2 – 3 times, then adjust the
idle speed with the throttle stop screw.
8. Turn the pilot screw inward to the final opening.
9. Readjust the idle speed with the throttle stop screw.
INITIAL OPENING: 1-3/4 turns out
TOOL:
[1] Pilot screw wrench
07908-4730002
[1]
[1] [2]
Plug the hose
joint of the
insulator.
IDLE SPEED: 1,500 ± 100 min
-1
(rpm)
FINAL OPENING: 1 turns in from the position
obtained in step 7
[1]