Polaris 450 S Offroad Vehicle User Manual

Emission Control Systems
Crankcase Emission Control System
This engine is equipped with a closed crankcase system. Blow-by gases are forced back to
the combustion chamber by the intake system. All exhaust gases exit through the exhaust
Exhaust Emission Control System
The emissions from the exhaust of this vehicle are controlled by engine design, including
factory-set fuel delivery and ignition. The engine and related components must be main-
tained at Polaris specifications to achieve optimal performance.
Engine idle speed is the only adjustment Polaris recommends that the operator perform. Any
other adjustments should be performed by an authorized Polaris dealer.
The emissions label is located on the front frame tube near the steering post.