Engine / Transmission

QMB139 Engine Parts

Engine & Transmission parts for 49cc / 50cc 4-stroke QMB139 engines.
This engine is one of the most popular 50cc 4-stroke engines used in Chinese & Taiwanese scooters.

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    50cc 4-stroke QMB139 complete engine assembly. Short crankcase version.

    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.

    Please Read The Following Important Notices:

    • This engine is shipped dry, included oil not installed. Includes 1 Liter of Bel-Ray Gear Saver Hypoid Oil 80W-90 and 1 Liter of Bel-Ray EXL Mineral 4T Engine Oil 10W-40. DO NOT RUN ENGINE WITHOUT ADDING SPECIFIED AMOUNTS OF OIL.
    • Check oil level after letting the engine idle for a few minutes, add additional oil if needed.

     

    • Set Up For Drum Brakes

     

    • $329.99

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    50cc 4-stroke QMB139 complete engine assembly. Long crankcase version.

    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.

    Please Read The Following Important Notices:

    • This engine is shipped dry, included oil not installed. Includes 1 Liter of Bel-Ray Gear Saver Hypoid Oil 80W-90 and 1 Liter of Bel-Ray EXL Mineral 4T Engine Oil 10W-40. DO NOT RUN ENGINE WITHOUT ADDING SPECIFIED AMOUNTS OF OIL.
    • Check oil level after letting the engine idle for a few minutes, add additional oil if needed.
    • Set Up For Drum Brakes

     

    • $339.99

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    Gearbox Cover for 50cc 4-stroke QMB139 engines.

    • $39.99

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    Gearbox Gasket for 50cc 4-stroke QMB139 engines.

    • $9.99

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    Emissions Valve Cover for 50cc 4-stroke QMB139 engines.

    • $29.99

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    Valve Cover Gasket for 50cc 4-stroke QMB139 engines.

    • $4.99

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    Non-Emissions Valve Cover for 50cc 4-stroke QMB139 engines.

    • $32.99

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    Left Crankcase Cover, Type-1 for 50cc 4-stroke QMB139 engines - Overall Length: 15.75 inches, 8 mounting holes.

    There are 3 versions of this cover, please check measurements before ordering.

    • $39.99

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    Left Crankcase Cover, Long Version, Type-2 for 50cc 4-stroke QMB139 engines - Overall Length: 17 inches, 11 mounting holes.

    There are 3 versions of this cover, please check measurements before ordering.

    • $39.99

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    Left Crankcase Cover, Type-3 for 50cc 4-stroke QMB139 engines - Overall Length: 18.25 inches, 12 mounting holes. 

    There are 3 versions of this cover, please check measurements before ordering.

    • $49.99

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    Chrome CVT Cover for 50cc, 4-stroke QMB139 engines.
    This is the Shortcase version commonly found on QMB139 scooters with 10" Rear Wheels.

    • $74.99

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    Chrome CVT Cover for 50cc, 4-stroke QMB139 engines.
    This is the Longcase version commonly found on QMB139 scooters with 12" or 13" Rear Wheels.

    • $79.99

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Items: 112 of 47, per page
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