The Ducati ST4s, produced from 2001 to 2003, represents Ducati's commitment to the sport-touring motorcycle segment. This model is distinguished by its high-performance 916 cc L-twin engine, featuring Desmodromic valve actuation and liquid cooling, delivering approximately 110 hp. Its design prioritizes a balance of comfortable ergonomics for longer distances with sporty handling, making it a capable machine for both spirited riding and touring. The ST4s embodies Ducati's heritage of engineering excellence, known for its distinctive V-twin power delivery and sophisticated chassis.

This Parts Manual provides comprehensive identification and visual reference for all components of the 2003 Ducati ST4s. It covers a wide array of systems, including the engine, fuel and emission systems, exhaust, clutch, brakes, suspension, electrical components, chassis, and bodywork. The manual's primary purpose is to facilitate accurate parts identification and ordering, offering detailed illustrations and part numbers to assist owners and technicians in maintaining and repairing the vehicle. Its scope is exhaustive, detailing every factory-supplied part to ensure correct component selection and assembly.