This CVT belt with 669 dimensions is designed for Scooter Engine 50cc GY6 139QMB. It is manufactured in China and perfect for those looking to upgrade their scooter performance. The belt is made of high-quality materials that guarantee durability and reliability. The belt is an essential part of the scooter engine, responsible for transferring power to the wheels. It is easy to install and maintain, making it an ideal replacement for worn-out belts. With this CVT belt, you can be sure of a smooth ride and improved performance.