This manual covers the Yamaha Majesty YP400, a popular maxi-scooter produced for the 2005, 2006, and 2007 model years. Known for its blend of comfort, performance, and practicality, the YP400 is powered by a liquid-cooled, SOHC, 4-valve, 395 cc engine featuring fuel injection and TCI ignition. Its robust steel frame, comfortable seating, and ample storage make it suitable for both daily commuting and longer journeys. The scooter is equipped with a hydraulic dual disc front brake and a hydraulic disc rear brake, with optional ABS available on certain models. This Professional Workshop Service & Repair Manual provides comprehensive, manufacturer-issued information for the Yamaha Majesty YP400. It details workshop procedures, service, repair, and maintenance across all major systems, including the engine, automatic CVT transmission, chassis, brakes, and electrical components. The manual includes step-by-step instructions, detailed diagrams, electrical schematics, and torque specifications, making it an invaluable resource for professional technicians and experienced DIY enthusiasts seeking to maintain and repair their vehicle with factory-level accuracy.