This manual provides comprehensive service and repair information for the KXR 90, an All-Terrain Vehicle (ATV) designed for the entry-level youth market. A Taiwanese manufacturer known for producing reliable and value-oriented vehicles, has engineered the KXR 90 to offer an accessible and robust experience. This ATV typically features a single-cylinder, air-cooled, four-stroke engine with an approximate 90cc displacement and an automatic transmission with a Continuously Variable Transmission (CVT) and reverse gear, making it competitive within its segment. This workshop service repair manual, presented in English and available in format, is an invaluable resource for both do-it-yourself enthusiasts and experienced mechanics. It covers all essential vehicle systems, including engine components, drivetrain, chassis, and electrical systems, with detailed step-by-step instructions, diagnostic procedures, and hundreds of photos and illustrations. The manual is designed to guide users through complete disassembly, reassembly, and repair, offering significant cost savings and ensuring the KXR 90 is maintained in optimal working condition.