Polaris Sportsman 9922475 Owner's Manual page 175

Troubleshooting
Engine Runs Irregularly, Stalls or Misfires
Possible Lean Fuel Mixture Cause
Low or contaminated fuel
Low octane fuel
Clogged fuel filter
Incorrect jetting
Possible Rich Fuel Mixture Cause
Overuse of choke
Fuel is very high octane
Incorrect jetting
172
Solution
Add or change fuel, clean the fuel system
Replace with recommended fuel
Replace filter
See your Polaris dealer
Solution
Inspect, clean and/or replace spark plugs
Replace with lower octane fuel
See your Polaris dealer