The LT-Z90 QuadSport, produced in 2009, is a highly capable entry-level youth ATV designed for recreational off-road use. Engineered with renowned quality and reliability, this model features an automatic transmission with an electric start, making it user-friendly for young riders and novice enthusiasts. Its robust construction, including a durable steel frame and safety features like an adjustable throttle limiter and a tether kill switch, ensures a secure and enjoyable experience. Building on the legacy of previous youth ATVs, the LT-Z90 is a well-regarded choice in its segment, offering a balance of performance and safety for aspiring off-road adventurers. This comprehensive service and repair manual provides detailed guidance for the 2009 LT-Z90 QuadSport. It covers all essential aspects of maintenance, troubleshooting, and repair, including in-depth procedures for the engine, transmission, fuel system, electrical system, brakes, suspension, and steering. With step-by-step instructions, diagnostic information, and technical specifications, this manual is an indispensable resource for owners and technicians alike. Its scope encompasses everything from routine maintenance tasks like oil changes and filter replacements to complex component overhauls and system diagnostics, ensuring the vehicle remains in optimal condition.