Universal Parts Premium QMB139, 49cc 4-Stroke complete engine, long crankcase version is the top of the line aftermarket replacement engine available in the marketplace. This is the only engine that has earned the Universal Parts stamp for our stringent quality and performance standards.
Engine is set up for PAIR Emissions System. PAIR is an acronym for Pulsed Secondary Air Injection System. 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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QMB139 50cc/49cc
