This manual covers the Yamaha Majesty YP400, a maxi-scooter renowned for its blend of comfort, performance, and practicality, produced around 2005. Representing the 400cc displacement class within Yamaha's Majesty scooter line, the YP400 is powered by a 395 cc, 4-stroke, liquid-cooled engine featuring fuel injection and a TCI ignition system. Its engineering quality is evident in its robust construction, including a linked braking system for enhanced safety and stability, and a comfortable chassis with telescopic front forks and a rear shock absorber. The model is designed for commuting and touring, offering a substantial 14-liter fuel tank and ample storage. This comprehensive Service Repair Workshop Manual provides detailed guidance for all aspects of the Yamaha Majesty YP400. It covers engine mechanicals, fuel and ignition systems, transmission, chassis, suspension, braking, and electrical systems. Included are routine maintenance procedures, repair instructions for all major components, and diagnostic troubleshooting charts for common issues. The manual is presented in an easy-to-use format, offering hundreds of pages of high-resolution information, including torque specifications, clearances, and step-by-step instructions, making it an invaluable resource for owners and technicians alike to maintain and repair the vehicle effectively.