Transmission Cover Assembly - Long Case - for QMB139 50cc Engines (1121_LC) Long Case. Kickstart Gear is Included. Transmission CVT Cover for 50cc, 4-stroke QMB139 engines. Fully assembled ready to install. This is the Longcase version commonly found on QMB139 scooters with 12" and 13'' Rear Wheels. Overall Length: 17 inches