GY6 Fan Cover - Emissions
Fan Cover for use with Emissions (PAIR) style shrouds on 150cc and 125cc GY6 4-stroke QMI152/157 and QMJ152/157 engines. PAIR is an acronym for Pulsed Secondary Air Injection System which is found on your cylinder head. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow.
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