Honda CRF250X Owner's Manual & Competition Handbook page 140

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Carburetor Adjustment & Tuning Tips
(4)
(5)
(4) air vent hoses
(5) overflow hose
134
Adjustments for Competition
Idle Speed Adjustment
1. If the engine is cold, start it and warm it up 3
minutes and then shut it off.
2. Connect a tachometer to the engine.
3. Shift into neutral. Start the engine.
4. Keep the motorcycle in an upright position.
5. Adjust idle speed with the throttle stop screw
(1).
(4)
Idle speed:
1,700 ± 100 min -1 (rpm)
(1)
(1) throttle stop screw
(4)