81cc High Performance Cylinder Kit for 50cc GY6 139QMB Scooter Engines Pneumatic Tires Please compare your old throttle

Please compare your old throttle pot to the photos when placing your order

then it is this Type 2

Yuasa YB14L-A2 and YTX14AHL

both which contribute to the large majority of failures in motorcycle applications

This is a very well-made scooter seat offering top-quality construction

81cc High Performance Cylinder Kit for 50cc GY6 139QMB Scooter Engines Pneumatic Tires Please compare your old throttle81cc high performance cylinder kit for 50cc GY6 139QMB scooter engines, by manufacturer NCY. This scooter upgrade kit is a high quality kit that is perfect for upgrading your old 50cc 139QMB engine to 81cc so you dont get left behind in todays fast paced world. Installing this upgrade kit will increase your engine bore size to 81cc, and includes an aluminum cylinder, 50 mm piston, piston rings, and gaskets. After installation, you will see an