This manual covers the GT-80 and DT-100 motorcycles produced between 1977 and 1982. These versatile dual-sport and off-road machines are celebrated for their robust engineering, reliability, and capability in various terrains. The GT-80 and DT-100 series represent a commitment to quality, offering riders a dependable platform for adventure and everyday use. Their simple yet effective two-stroke engines, known for their responsive power delivery and ease of maintenance, have made them enduring favorites for both new riders and seasoned enthusiasts. This comprehensive Service Repair Workshop Manual provides in-depth information essential for maintaining and repairing your GT-80 or DT-100. It details engine disassembly and assembly, transmission and clutch operation, fuel system servicing, electrical system diagnostics, chassis and suspension maintenance, and brake system procedures. The manual includes routine maintenance checks, troubleshooting guides for common issues, and detailed rebuild instructions. With factory-level technical specifications, torque values, and clear, zoomable illustrations, this resource empowers owners and technicians to perform all necessary upkeep and repairs accurately and efficiently.