Target Audience:
Commuters, touring riders, and general enthusiasts seeking reliable service information for their Yamaha Majesty YP400.
Competitors:
Rivals include other maxi-scooters in the 400cc class from manufacturers like Suzuki (Burgman 400), Honda (Silver Wing 400), and Kymco (Xciting 400i).
Vehicle Highlights:
Comfortable ergonomics, generous storage capacity, powerful and fuel-efficient 400cc engine, suitable for urban commuting and longer-distance travel.
Manual Value Proposition:
Provides factory-level diagnostic and repair procedures, enabling owners and technicians to maintain and service the scooter effectively, reducing reliance on external service centers.
Vehicle Coverage:
Complete coverage for 2005, 2006, and 2007 Yamaha Majesty YP400, YP400T, YP400V, and YP400W models.
Page Count:
Not specified, but described as 'complete' with detailed diagrams.
Manual Type:
Workshop Service Repair Manual
Engine:
Complete engine overhaul, diagnostics, performance tuning, fuel injection, ignition, cooling, lubrication systems.
Transmission:
Automatic transmission (CVT) operation, maintenance, troubleshooting, clutch, and drive belt service.
Chassis:
Frame, suspension (front fork, rear shock), steering, wheels, tires, and braking systems.
Electrical:
Battery, charging system, starter motor, lighting, ignition, instruments, wiring diagrams, and electronic control unit (ECU).
Bodywork:
Fairings, body panels, seat, storage compartments, and cosmetic components.
Maintenance:
Scheduled maintenance, fluid changes (oil, coolant, brake fluid), filter replacements, spark plug service, valve clearance adjustment.
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault codes, electrical system diagnosis, mechanical troubleshooting.
Repair:
Step-by-step repair instructions for all major components and systems, including engine rebuilds, suspension overhaul, and electrical repairs.
Disassembly Reassembly:
Detailed instructions for component removal and reinstallation, including exploded views.
Depth:
Comprehensive factory-level technical information, suitable for professional technicians and advanced DIY mechanics.
Engine Type:
Liquid-cooled, 4-stroke, SOHC, 4-valve, single-cylinder
Bore X Stroke:
83.0 mm x 73.0 mm
Compression Ratio:
11.2:1 (Typical)
Horsepower:
Approx. 34 HP @ 7500 RPM (Varies slightly by model year and emissions standards)
Torque:
Approx. 36 Nm (26.5 ft-lbs) @ 6000 RPM (Varies slightly)
Fuel Delivery:
Fuel Injection (Mikuni or similar)
Fuel Type:
Unleaded gasoline, minimum 91 octane (RON+MON)/91 AKI
Oil Type:
Yamaha Performance Oil, SAE 10W-40 API SG or higher, or equivalent JASO MA certified motorcycle oil.
Oil Capacity:
1.90 L (2.01 US qt) without filter change; 2.10 L (2.22 US qt) with filter change.
Cooling System:
Liquid-cooled
Coolant Type:
Yamaha All Weather Coolant (or equivalent permanent type antifreeze/coolant solution, 50/50 mix with distilled water).
Braking System Front:
Dual 260 mm disc brakes with hydraulic calipers (dual-piston or multi-piston)
Braking System Rear:
260 mm disc brake with hydraulic caliper (dual-piston or multi-piston)
ABS:
Optional (ABS models available)
Lighting:
Dual Halogen headlights, LED taillight
Indicators:
Integrated front and rear turn signals
Instrumentation:
Digital speedometer, analog tachometer, fuel gauge, clock, odometer, trip meters, warning lights (check engine, oil, battery, etc.).
ABS Availability:
Anti-lock Braking System (ABS) was an optional feature on certain YP400 models during this period.
Storage Features:
Under-seat storage compartment typically large enough for one full-face helmet and additional items.
Charging Ports:
Some models may have an accessory power outlet for charging devices, consult manual for details.
Engine Oil Change:
Every 5,000 km (3,000 miles) or 6 months, whichever comes first.
Oil Filter Change:
Every 10,000 km (6,000 miles) or 12 months, concurrent with oil change.
Air Filter Cleaning Replacement:
Inspect every 5,000 km (3,000 miles), clean/replace as needed based on operating conditions.
Spark Plug Replacement:
Typically around 20,000 km (12,000 miles), refer to manual for specific plug type and gap.
Brake Fluid Change:
Every 2 years or 20,000 km (12,000 miles), or as needed based on fluid condition.
Coolant Replacement:
Every 2 years or 40,000 km (24,000 miles).
Drive Belt Inspection Replacement:
Inspect every 10,000 km (6,000 miles), replace as indicated by wear or damage.
Engine Oil Viscosity:
SAE 10W-40
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid
Coolant Type:
Mixture of ethylene glycol based permanent type antifreeze and distilled water (50:50 ratio)
Common Wear Items:
Drive belt, brake pads, tires, fork seals, and suspension components are common wear items due to mileage and usage.
Electrical Potential Issues:
While generally reliable, potential issues could include stator coil degradation or regulator/rectifier failure over extended periods, as common in many motorcycles.
Manufacturer:
Yamaha Motor Company is a Japanese manufacturer of motorcycles, marine products, and other motorized products. Founded in 1955.
Majesty Lineage:
The Majesty line has a history of comfortable, practical maxi-scooters, with the YP400 representing a significant evolution in performance and features for the North American market.
Manufacturing Origin:
Japan (typically for core components and assembly, though specific plant locations may vary).