150cc 4-Stroke Long-Case GY6 Gas Engine with automatic CVT transmission.

This scooter engine is used in a wide variety of applications, including full-size street legal scooters, all terrain vehicles (ATVs), dirt bikes, and go karts. Compatible with both 125cc and 150cc engine size scooters and vehicles.

This complete engine includes electric starter, kick start, and CVT.
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.