This workshop service manual provides comprehensive guidance for the Nexus 125, a premium maxi-scooter known for its sporty styling, comfortable ergonomics, and practicality for urban commuting and light touring. Manufactured by the historic Italian brand, the Nexus 125 (Euro 3) was produced in the mid-to-late 2000s and early 2010s, offering a capable 124 cc four-stroke engine designed for efficient city use. Its engineering quality and reliability are supported by features such as a robust steel frame, advanced suspension, and effective braking systems, making it a distinguished choice in its market segment. This manual serves as an essential resource for owners, mechanics, and technicians, detailing a wide array of maintenance, troubleshooting, and repair procedures. It covers critical mechanical systems including the engine, fuel system, cooling system, transmission, brakes, suspension, and steering. Within its scope are routine maintenance tasks, step-by-step repair instructions, assembly and disassembly guidelines, and essential torque specifications. While electrical diagrams and wiring schematics are excluded, the manual focuses on mechanical aspects, providing the necessary information to maintain the Nexus 125's peak performance and ensure its longevity.