The first company to start using the GY6 engine in its scooters was Honda. It proved to be such a strong and dependable motor that other scooter and ATV companies began using it in their vehicles. Soon the GY6 became the most popular motor throughout Asia including Taiwan and China. But scooter owners in the United States soon learned how great this motor is and how easy it is to work on. This page is a valuable resource for this motor. Use this 122 page manual to service and repair your GY6 engine.