This manual covers the T4, a dual-sport motorcycle produced in 1987, available in T4 350 and T4 500 variants. Originating from Italy, the manufacturer is known for its performance-oriented motorcycles, and the T4 series represented their entry into the popular dual-sport market of the mid-to-late 1980s. These models were engineered with air-cooled parallel-twin engines, typically featuring twin carburetors and a 5-speed manual transmission with chain drive. The T4 was designed for versatility, offering capabilities suitable for both on-road riding and light off-road excursions, competing with contemporaries like the Honda Transalp and Yamaha Tenere. Its robust steel tubular frame and disc brakes front and rear provided a solid foundation for its adventurous spirit, with a notable history in motorsports that underscored its off-road prowess. This comprehensive workshop service and repair manual is intended for owners and mechanics seeking to maintain and repair T4 models. It provides detailed guidance on all aspects of the motorcycle, from routine maintenance procedures such as oil changes and spark plug replacement to in-depth engine and transmission overhauls. The manual covers the electrical system, chassis, suspension, and braking systems, offering troubleshooting guides and diagnostic procedures for common issues. It includes essential technical specifications, torque values, and clearances necessary for accurate repairs. By equipping users with this knowledge, the manual facilitates self-sufficient maintenance and repair, ensuring the longevity and optimal performance of the T4.