This manual covers the Yamaha YP400X Majesty, a premium-class sport scooter designed for both urban commuting and touring. Known for its spacious seating, excellent wind protection, and comfortable ergonomics, the YP400X Majesty offers a powerful 395cc liquid-cooled engine that delivers responsive acceleration and stable high-speed handling. The heritage of innovation and quality is evident in this model, which features generous under-seat storage and intuitive controls, making it a practical and enjoyable choice for riders. This comprehensive English-language Factory Service Repair Workshop Manual provides detailed information for the maintenance, repair, and troubleshooting of the Yamaha YP400X Majesty. It includes step-by-step instructions for engine disassembly and assembly, cooling system diagnosis, fuel system servicing, brake system maintenance, suspension work, chassis inspection, and electrical system diagnostics. With hundreds of diagrams and illustrations, this manual is an essential resource for professional technicians and experienced DIY mechanics aiming to keep their YP400X Majesty in optimal condition.