Polaris Outlaw 450 MXR - Manual (Page 185)

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Troubleshooting
Engine Fails to Reach High RPM
Engine Uses Excessive Oil
Possible Cause Solution
Worn or dirty needle valve Clean and/or replace needle valve
Loose carburetor jets Tighten jets
Faulty ignition timing See your Polaris dealer
Possible Cause Solution
Bent engine ventilation hose Install a new hose
Excessive oil in system Check oil level, maintain at recommended level
Use of non-recommended oil (too thin) Replace with a recommended oil