Polaris 2013 ATV Sportsman 500 Tractor INTL - Manual (Page 70)

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EMISSION CONTROL SYSTEMS
Noise Emission Control System
Do not modify the engine, intake or exhaust components, as doing so
may affect compliance with governmental noise level requirements.
Spark Arrester
Your POLARIS vehicle has a spark arrester that was designed for on-
road and off-road operation. It is required that this spark arrester remain
installed and functional when the vehicle is operated.
Exhaust Emission Control System
Exhaust emissions are controlled by engine design. An electronic fuel
injection (EFI) system controls fuel delivery. The engine and EFI com-
ponents are set at the factory for optimal performance and are not
adjustable.
Electromagnetic Interference
This spark ignition system complies with USA requirements, Canadian
ICES-002 and EMC requirements of European directives 97/24/EC and
2004/108/EC.