This manual covers the Quad Runner 80 (LT80), a versatile and reliable all-terrain vehicle produced from 1987 through 2006. Engineered for recreational use and rider-friendliness, the LT80 is renowned for its durable construction and straightforward operation, making it a popular choice for both young riders and experienced enthusiasts. Its 78cc two-stroke, air-cooled engine, coupled with an automatic transmission, provides accessible power and ease of control, reflecting a legacy of quality in ATV manufacturing. This comprehensive workshop repair and service manual provides detailed guidance for maintaining and repairing the LT80. It encompasses essential procedures such as engine overhaul, transmission service, drivetrain maintenance, suspension and steering adjustments, brake system servicing, and electrical system diagnostics. The manual includes routine maintenance schedules, troubleshooting guides for common issues like carburetor clogging and electrical connections, and step-by-step repair instructions, making it an indispensable resource for owners and technicians to ensure the longevity and optimal performance of their vehicle.