Polaris 2014 Ranger 400 - Manual (Page 70)

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MAINTENANCE
Carburetor
The idle speed adjustment should be performed as outlined in the Periodic Maintenance
Chart, or whenever the idle speed is changed. Recommended engine idle RPM is 1200 +/-
200.
Carburetor/Engine Idle RPM Adjustment
If the engine idle speed is unsatisfactory and all other conditions are favorable, the carburetor
can be adjusted.
1. Apply the brakes.
2. Place the transmission in PARK.
3. Start the engine and allow it to warm up for approximately
five minutes.
4. Remove the seat. Locate the idle adjust screw.
5. Place the transmission in gear.
6. Turn the screw in (clockwise) to raise RPM. Turn the screw
out (counter-clockwise) to lower RPM.
Idle Adjust Screw