Honda TRX90X, Owner'S Manual

Page: 131 / 221

Servicing Your Honda
122
Engine Idle Speed and Air-Fuel
Mixture
The best way to assure proper carburetion is to see your dealer for
regularly scheduled servicing, including carburetor adjustment.
Remember, idle speed adjustment is not a “cure-all” for other
problems in your engine’s fuel-delivery system. Adjusting the idle will
not compensate for a fault elsewhere.
The engine must be at normal operating temperature for accurate
idle speed adjustment.
For information about high altitude carburetor adjustment, see page 195.
Refer to Safety Precautions on page 94.
1. If the engine is cold, start it and warm it up with 10 minutes of
stop-and-go riding. Stop the engine.
2. Park your ATV on a firm, level surface.
3. Connect a tachometer to the engine.
4. Shift into neutral. Start the engine.
5. Adjust idle speed using a screwdriver to turn the throttle stop
screw (1).
Idle speed (in neutral):
1,600 ± 100 min –1 (rpm)
Idle Speed Adjustment
LEFT SIDE
(2)
(1) throttle stop screw (2) air screw
(1)
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