This manual covers the Ducati Supersport 900ss, a performance sportbike produced for the 1975, 1976, and 1977 model years. As a classic Italian sportbike, the 900ss is characterized by its air-cooled 90-degree L-twin engine featuring Desmodromic valve actuation, a steel tube trellis frame, and dual front disc brakes. It represents a significant step in Ducati's evolution, known for its sporting intent, characteristic handling, and distinctive sound, placing it among notable contemporaries like the Moto Guzzi V7 Sport and Kawasaki Z1.

This comprehensive Workshop Service Manual (WSM) provides detailed information for the maintenance, repair, and troubleshooting of the Ducati Supersport 900ss. It covers essential areas including mechanical repair of the V-twin engine, fuel and ignition systems, transmission, brakes, suspension, chassis, and bodywork. The manual includes routine maintenance procedures, engine rebuild instructions, carburetor tuning, desmodromic valve adjustments, and electrical system repairs, making it an indispensable resource for owners and technicians seeking to preserve the performance and integrity of this iconic motorcycle.