This manual provides comprehensive service and workshop repair information for the Mongoose gd125 150 motorcycle/ATV. Engineered for reliability and performance, this vehicle is designed to meet the demands of both recreational riding and practical utility. Its robust construction and advanced features ensure a dependable and enjoyable experience for owners. This English-language Service & Workshop Repair manual is your essential guide for maintaining and repairing your Mongoose gd125 150. It covers a wide range of critical areas, including general maintenance, engine and transmission service, brake and electrical systems, suspension, steering, fuel injection, and chassis components. Detailed troubleshooting steps, technical specifications, and essential safety guidelines are also included to assist owners, mechanics, and technicians in ensuring the optimal performance and longevity of the vehicle.