50cc 4-stroke QMB139 scooter complete engine assembly| Long case
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. 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