2004 Yamaha YP400T Majesty 400 Factory Service Manual (P/N LIT-11616-18–38)

• Covers the 2004 Yamaha YP400T Majesty 400 maxi scooter, including 5RU4 and 5RUC variants
• Official Yamaha publication P/N LIT-11616-18–38, first edition June 2004
• Contains 387 pages of factory technical information including cooling system diagrams, cable routing, and maintenance charts
• Serves as the original reference for the YP400T fuel-injected maxi scooter platform
• Explores the V-belt drive, primary sheave, secondary sheave, throttle body, and fuel pump
• Includes complete wiring diagrams, circuit diagrams, air induction system diagrams, exploded diagrams, and troubleshooting charts

Manual Organization and Content

Need the exact factory specs for a 2004 Majesty 400? This 387-page PDF service publication details the maintenance and mechanical repair procedures for the YP400T. It features nine chapters covering the entire vehicle, from the engine and transmission down to the fuel injection and cooling systems. The text maps out routine maintenance specifications, periodic checks, and complex mechanical assemblies. By utilizing the built-in ECU self-diagnostic function and the provided fault code tables, you can pinpoint sensor failures directly through the multifunction display, eliminating the need for proprietary dealership scanners. This helps professional technicians and serious DIYers keep the equipment running right while preventing costly parts swapping.

You get periodic maintenance charts for emissions and lubrication. Sections map out chassis work, including front and rear brake disc maintenance, front fork teardowns, and steering head inspections. Instead of outsourcing complex jobs to a dealership, this reference provides step-by-step procedures for bleeding the hydraulic brake system, replacing the CVT V-belt, and reading ECU fault codes. The engine documentation dives into timing chain adjustments and oil pump inspections. Valve clearance measurements are easy to cross-reference using the included tolerance charts. Every section provides the explicit technical values required for standardized shop work.

Experienced mechanics know the YP400T platform has specific quirks. Neglecting to clean the hidden V-belt case air filter element restricts airflow, leading to severe heat buildup and premature drive belt failure. Furthermore, attempting to remove the clutch shoe assembly nut without the dedicated sheave spring compressor and fixed block allows the heavy compression spring to violently release.

A quick safety note for the shop floor: Always rely on the complete factory documentation before tearing into the engine. The service data shown in this overview is for preliminary reference only to give you an idea of the manual's depth.

Technical Specification Preview

Technical data drives this entire document. You will find torque values, fluid capacities, and precise electrical reference thresholds. For example, the engine assembly data specifies cylinder head bolt torque at 52 Nm (5.2 m·kg, 37 ft·lb) for cap nuts. Cooling system capacity sits at 1.57 liters. Ignition system timing is mapped at 5° BTDC at 1,400 r/min.

Need valve clearances? The intake is listed at 0.15–0.20 mm, while the exhaust requires 0.25–0.30 mm. For electrical diagnostics, stator coil resistance measures 0.184–0.276 ohms across the white–white wire configuration.