The Sothassi Classic 400 is a retro-styled motorcycle powered by a 397 cc single-cylinder, 4-stroke, air-cooled engine. It produces approximately 26–29 bhp (around 19.5 kW) and 30 Nm of torque, paired with a 5-speed manual transmission and chain final drive. With its twin exhausts, classic round headlight, 13-litre fuel tank, and disc brakes front and rear, the Classic 400 is designed for riders seeking vintage aesthetics and everyday usability.