The 2003 ST4s is a distinguished sport-touring motorcycle, blending potent performance with the comfort required for longer journeys. Powered by a liquid-cooled, 90° L-Twin engine featuring Desmodromic valve actuation, this model offers approximately 117 horsepower and 9.5 kgm of torque. Its engineering is characterized by a robust tubular steel trellis frame, fully adjustable USD front forks, a progressive rear monoshock, and powerful Brembo radial-mount calipers, all contributing to its exceptional handling and riding dynamics. Designed for riders who demand both exhilarating performance and practical touring capabilities, the ST4s represents a commitment to creating high-quality, engaging motorcycles.

This comprehensive Parts Catalog for the 2003 ST4s provides detailed information essential for parts identification and procurement. It covers a wide array of vehicle systems, including engine components, fuel system, transmission, chassis, suspension, brakes, wheels, electrical system, and bodywork. The manual includes illustrations and diagrams for assembly and disassembly, along with specific fastener information and part numbers. While primarily focused on parts, it serves as a crucial resource for owners, mechanics, and technicians to accurately identify and source necessary components, ensuring the proper maintenance and longevity of the ST4s.