Carburetor 49cc 50cc 4 Stroke GY6 Engine 139QMB 139QMA 50QT w Electric Choke It will work with Honda GY6 50cc 80cc base 4 stroke engines and Chinese 50cc 4 stroke engines 139QMB and 139QMA, 50QT & 49QT Lighter and more powerful calibrated for gasoline and neat appearance No assembly required and can be installed in minutes Please check pictures/dimensions before the purchase or contact us for details