🏷️ Basic Information

Make:

Yamaha

Model:

YP400 MAJESTY

Model Nickname:

Majesty 400

Model Variant:

YP400

Chassis Code:

5RU

Engine Code Prefix:

H322E

👋 Introduction

Segment:

Maxi-scooter / Sport scooter

Target Audience:

Commuters, touring riders, enthusiasts seeking a comfortable and capable large-displacement scooter

Key Competitors Era:

Suzuki Burgman 400, Honda Silver Wing 400/600, Kymco Xciting 400

Design:

Aerodynamic bodywork, comfortable seating, integrated storage, motorcycle-like chassis elements

Performance:

Strong engine performance for highway cruising and acceleration, responsive CVT

Handling:

Stable chassis, capable suspension for a scooter, good braking performance

Comfort:

Spacious seating, wind protection, ergonomic rider triangle

📋 Manual Details

Years Covered:

2005, 2006, 2007

Regions Covered:

Global (specifications may vary by market)

Estimated Pages:

Hundreds of pages (exact count not specified but implied to be comprehensive)

Type:

Service Repair Manual

Scope:

Comprehensive repair, maintenance, rebuild, refurbish, restore

Language:

English

Format:

PDF

📖 Manual Coverage

Engine:

Complete engine disassembly, inspection, repair, and reassembly (including cylinder head, pistons, crankshaft, lubrication system, cooling system)

Fuel System:

Fuel injection system, fuel pump, injectors, fuel filter, throttle body

Transmission:

Automatic CVT (Continuously Variable Transmission) system, drive belts, clutch, gears, lubrication

Electrical System:

Wiring diagrams, charging system (stator, regulator/rectifier), starting system (starter motor, battery), ignition system, lighting, instruments, sensors

Brakes:

Front and rear brake systems, hydraulic lines, master cylinders, calipers, brake pads, rotors, parking brake

Suspension:

Front telescopic forks, rear swingarm, shock absorbers, linkage (if applicable), bearings

Steering:

Handlebars, steering stem, bearings, linkages

Cooling System:

Radiator, fan, coolant hoses, thermostat, water pump

Exhaust System:

Exhaust pipes, muffler, catalytic converter (if applicable)

Frame And Bodywork:

Chassis components, fairings, panels, seat, storage compartment, mounting hardware

Maintenance:

Routine checks, oil changes, filter replacements, spark plug service, brake fluid changes, coolant checks

Troubleshooting:

Diagnostic procedures, identification of common problems, fault finding charts

Repair:

Step-by-step instructions for component replacement and repair

Rebuilding:

Detailed instructions for complete engine and transmission rebuilds

Adjustment:

Carburetor/throttle body synchronization, idle speed adjustment, brake lever adjustment

Inspection:

Pre-ride checks, detailed component inspection guidelines

Depth:

Comprehensive, covering everything from basic maintenance to complete engine and transmission overhauls.

Detail Level:

Highly detailed with exploded views, diagrams, torque specifications, and special tool requirements.

📊 Manual Specifications

File Type:

PDF

Searchability:

Typically searchable text within the PDF (dependent on original scan quality)

Quality:

High resolution for clear diagrams and text (dependent on source)

Binding:

N/A (Digital PDF format)

Paper:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine Type:

Four-stroke, liquid-cooled, SOHC, 4-valve

Displacement:

395 cc (24.1 cu in)

Bore X Stroke:

83.0 mm x 73.0 mm (3.27 in x 2.87 in)

Compression Ratio:

10.0:1

Horsepower Approx:

31.5 hp @ 7500 rpm (approximate, may vary by market/tuning)

Torque Approx:

31.0 Nm @ 6000 rpm (approximate, may vary by market/tuning)

Fuel Delivery:

Fuel Injection (throttle body size typically 40mm)

Fuel Type:

Unleaded gasoline

Fuel Capacity:

14 Liters (3.7 US gal)

Oil Type Specification:

Yamalube 4-stroke motorcycle oil, API SG or higher, SAE 10W-40 recommended (Refer to manual for specific viscosity and API classification for operating temperature)

Oil Capacity W Filter:

Approx. 2.2 Liters (2.3 US qt)

Coolant Type Specification:

Yamaha-specific liquid-cooled coolant (Ethylene Glycol based) with rust inhibitors. Mix 1:1 with distilled water. (Refer to manual for exact specification and ratio).

🔧 Transmission

Type:

Automatic CVT (Continuously Variable Transmission)

Drive System:

V-belt

Final Drive:

Gear reduction

Engagement:

Centrifugal clutch

Fluid Type Specification:

Yamaha scooters gear oil or equivalent SAE 80 API GL-4 (Check manual for specific part number or viscosity for initial fill/change).

📐 Dimensions

Length:

Approx. 2,200 mm (86.6 in)

Width:

Approx. 775 mm (30.5 in)

Height:

Approx. 1,420 mm (55.9 in) (seat height varies)

Wheelbase:

Approx. 1,545 mm (60.8 in)

Dry Weight:

Approx. 187 kg (412 lbs)

Wet Weight:

Approx. 200 kg (441 lbs) (curb weight, with fluids)

Underseat Storage:

Ample space, typically accommodates two full-face helmets

Glove Box:

Yes, front mounted

🛡️ Safety Features

Safety Certification:

CE, EPA, CARB (depending on market)

Braking System:

Front: Dual disc brakes, Rear: Single disc brake. Some models may feature ABS (Anti-lock Braking System) as an option or standard depending on market.

Lighting:

Halogen headlights, LED taillights (depending on year/trim), turn signals

Chassis Design:

Rigid frame providing stability

Mirrors:

Large, adjustable mirrors for enhanced visibility

💡 Technology Features

Instrument Cluster:

Digital LCD display with analog tachometer, speedometer, odometer, trip meter, fuel gauge, clock, and various warning lights.

ABS:

Available as an option on some models/markets, enhancing braking safety.

Charging Port:

Typically includes a 12V accessory socket for charging mobile devices.

ECM:

Engine Control Module (ECM) manages fuel injection and ignition timing for optimal performance and emissions.

🔧 Maintenance

Oil Change Interval:

Every 5,000 km (3,000 miles) or 6 months, whichever comes first (Refer to manual for precise interval).

Air Filter Inspection:

Every 5,000 km (3,000 miles) or 6 months. Replacement as needed.

Spark Plug Replacement:

Every 10,000 km (6,000 miles) or 1 year (Refer to manual for correct plug type).

Transmission Oil Change:

Every 10,000 km (6,000 miles) or 1 year.

Coolant Flush Interval:

Every 2 years or 20,000 km (12,000 miles), whichever comes first.

Drive Belt Inspection:

Every 10,000 km (6,000 miles). Replacement typically around 20,000-30,000 km (12,000-18,000 miles) depending on wear.

Engine Oil:

Yamalube 4-stroke motorcycle oil, API SG or higher, SAE 10W-40 recommended. Capacity: 2.2 L with filter.

Gear Oil:

SAE 80 API GL-4.

Coolant:

Ethylene Glycol based, 1:1 with distilled water. (Check manual for Yamaha's specific blend and anti-corrosive additive requirements).

Brake Fluid:

DOT 3 or DOT 4 (Check manual for specific type and DOT rating).

Common Wear Items:

Drive belt, starter motor brushes, battery, suspension bushings.

Electrical Component Reliability:

While generally reliable, voltage regulator/rectifier can be a potential failure point on older models; inspect regularly.

Engine Performance Degradation:

Can occur due to carbon buildup in combustion chamber or worn valve seals, requiring decarbonization or cylinder head service.

Importance Of Manual:

This manual provides the definitive schedule and specifications, overriding any generic advice. Adhering to it is crucial for longevity.

📚 Vehicle History

Yamaha Motorcycles:

Yamaha Motor Company, Ltd. is a Japanese manufacturer of motorcycles, marine products, and other motorized products. Founded in 1955, it has a long history of innovation and performance in the automotive and powersports industries.

Yp Series:

The YP400 Majesty is part of Yamaha's esteemed 'Majesty' line of maxi-scooters, known for blending comfort, practicality, and sporty performance.

Yp400 Introduction:

The YP400 Majesty was introduced to the market to compete in the growing large-displacement scooter segment, offering a refined riding experience and substantial power.

Manufacturing Location:

Primarily manufactured in Japan and/or other Yamaha global facilities.

🏆 Awards & Recognition

Market Reputation:

Consistently praised for its blend of comfort, performance, and reliability in the maxi-scooter segment.

Consumer Reviews:

Generally receives positive reviews for its touring capability, weather protection, and powerful engine.