The Ducati 400SS was a sports motorcycle manufactured by Ducati from 1989 to 1997. It was also known as the 400SS Junior. In addition, the maker released other versions like the Ducati 350SS (1991 to 1993) and the 600SS (1993 to 1999).
The smaller 350cc and 400cc versions were developed to meet Italy's 350cc and Japan's 400cc regulations limits of the maximum displacements allowed for beginner riders. In addition, the 1994 Ducati 600SS was introduced as a cheap way to expand Ducati's range.
In 1993, the Italian motorcycle manufacturer released the Ducati 400SS, a motorcycle that packed the same technical, visual, and performance specifications as previous models without any significant modifications or improvements.
Similar to previous models, the 1993 model had standard features, like a a full fairing with a small windscreen, a rectangular headlight, a single seat, a steel trellis frame, a single exhaust system with a muffler mounted on the left side, and three-spoke lightweight aluminum wheels.
The Ducati 400SS shared the same frame, engine, and most of the larger Ducati 750SS components, the most notable difference being the two-into-one exhaust system and the single brake disc on the front.
Power-wise, the 1993 Ducati 400SS took its muscles from a 398cc four-stroke air-cooled V-twin engine installed under the fuel tank, managed by a Mikuni carburetor, delivering 42 hp with a maximum peak force at 7,000 rpm and 35 Nm (26 lb-ft) torque at 8,500 rpm.