The Vespa ET4 is a distinguished scooter model, produced approximately between 1997 and 2004. It represents a significant evolution in Vespa's lineup, transitioning to more efficient four-stroke engines and offering a blend of classic Italian design with modern practicality. Known for its robust build quality, comfortable ride, and iconic styling, the ET4 was positioned as a premium urban mobility solution, competing with models from Honda, Kymco, and Yamaha. Available in 124cc and 150cc variants, it features a monocoque steel frame, automatic centrifugal clutch, and a Continuously Variable Transmission (CVT) for smooth operation.

This manual provides comprehensive service and parts information for the Vespa ET4 scooter. It covers essential maintenance procedures, detailed troubleshooting guides for common issues, and step-by-step repair instructions for all major systems, including the engine, fuel, ignition, transmission, brakes, suspension, and electrical components. The manual also includes technical specifications, exploded diagrams for parts identification, and information on fluid types and capacities. Its purpose is to assist owners, mechanics, and technicians in maintaining the reliability, performance, and longevity of their Vespa ET4.