This manual covers the Ducati ST4 and ST4s sport touring motorcycles produced between 2002 and 2005. These Italian-engineered machines are characterized by their powerful L-twin engines, featuring desmodromic valve actuation derived from Ducati's Superbike lineage, specifically the DS996 engine for the ST4s variant. The ST4s model further distinguished itself with higher-specification Öhlins suspension and lighter Marchesini wheels, enhancing its already impressive handling and ride quality. Designed to blend the exhilarating performance of a sportbike with the comfort required for longer journeys, the Ducati ST series offers a unique proposition for performance-oriented riders.

This comprehensive service repair manual provides detailed information essential for the maintenance, repair, and troubleshooting of your Ducati ST4 or ST4s. It covers all major systems, including complete engine overhauls, fuel and ignition systems, braking, suspension, electrical components, and bodywork. Within its 300+ pages, you will find step-by-step procedures for scheduled maintenance, component replacement, and in-depth diagnostics. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the optimal performance and longevity of their motorcycle, offering guidance from basic upkeep to complex repairs.