This manual covers the YP400 Majesty, a maxi-scooter produced in 2005. Renowned for its blend of comfort, practicality, and performance, the YP400 Majesty is designed for commuting and touring. It features a 4-stroke, liquid-cooled, SOHC, 4-valve engine with electronic fuel injection, delivering approximately 28-30 horsepower and 30-32 Nm of torque. The scooter is equipped with an automatic CVT transmission, front and rear disc brakes, and a robust steel frame, reflecting a commitment to engineering quality and rider comfort. This comprehensive professional workshop service and repair manual provides factory-level diagnostic, service, repair, and maintenance information for owners, independent workshops, and professional technicians. It details engine mechanicals, fuel and ignition systems, transmission, electrical systems, chassis, suspension, and brakes, along with bodywork and trim. The manual includes step-by-step repair instructions, detailed diagrams, complete wiring schematics, torque specifications, fluid capacities, and troubleshooting guides to ensure proper maintenance and repair of the YP400 Majesty.