Universal Parts QMB139 Longcase Engine

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

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 and 1 Liter of Bel-Ray Engine Oil. 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

• This Engine Only Ships to the Continental U.S.

• Scooterworks.com has a no-return policy on all engines, barring manufacture defect or shipping damage.




• This is not the correct engine for Maddog style scooters, it will be too short.

• Premium Quality, Hand Inspected, QC Verified
• Output Shaft Length: 122mm
• Accommodates 12-13 Inch Wheel Size
• Set Up For Drum Brake
• Set Up for PAIR Emissions System
• 8 Pole A/C Stator
• 69mm Valves
• Includes Premium Bando Drive Belt & NGK Spark Plug
• Engine Oil: 0.8 Liters
• Gear Oil: 0.12 Liters (filling) and 0.10 Liters (changing)
• Shipped Dry, Included Oil Not Installed - Do NOT Run Engine Without Adding Specified Amounts of Oil (Bel-Ray Oil Included)
• This Engine Only Ships to the Continental U.S.

QMB139 50cc/49cc