Polaris 9919510 Owner's Manual For Maintenance And Safety page 161

ADJUSTMENTS
Carburetor/Idle RPM
Carburetor re-jetting can be performed to compensate for altitude and/or temperature
changes. If the vehicle is to be operated at various altitudes and temperatures, certain
adjustments can be made to improve its operation and driveability. Above 6000 feet (1800
m) the engine air/fuel mixture becomes overly rich. An engine loses approximately 3% of
its power for each 1000-foot (304.8 m) increase in elevation. Although this power cannot
be regained, changes to the carburetor and drive system can be made to allow more efficient
operation.
NOTE: Contact your dealer for altitude adjustments. Your dealer has the training and
special tools required to perform these modifications.
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