🏷️ Basic Information

Make:

Yamaha

Model:

Bruin

Model Variants:

350, 400

Model Years Covered:

2004, 2005, 2006

Product Type:

Digital Workshop Repair Manual

👋 Introduction

Target Audience:

Yamaha Bruin ATV owners and independent repair shops

Value Proposition:

Significant cost savings on dealership service and repairs, empowers DIY maintenance

Content Depth:

A-Z repair procedures, detailed diagnostics, high-quality visuals

User Experience:

Easy to view and print, no advanced computer skills required

📋 Manual Details

Overall Coverage:

Comprehensive repair and maintenance for Yamaha Bruin 350 and 400 models

Specific Systems Covered:

Engine, Transmission, Drivetrain, Suspension, Steering, Brakes, Electrical System, Fuel System, Cooling System, Exhaust System, Chassis, Bodywork, Troubleshooting

Estimated Page Count:

Likely 500+ pages (typical for comprehensive workshop manuals of this era and type)

Type:

Workshop Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Mechanical:

Disassembly, inspection, assembly, torque specifications, piston, rings, cylinder, crankshaft, camshaft, valve train, timing

Engine Management:

Fuel injection system (EFI), ignition system, sensors, ECU diagnostics, emission control

Drivetrain:

Automatic Transmission (AT), Continuously Variable Transmission (CVT) operation (if applicable), gearboxes, differentials, driveshafts, CV joints, final drive

Suspension:

Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications

Steering:

Steering system components, tie rods, steering linkage, steering wheel, power steering (if equipped)

Brakes:

Hydraulic system, brake calipers, master cylinder, brake pads, brake rotors, bleeding procedures, parking brake

Electrical System:

Battery, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting, ignition switch, fuses, relays, wiring diagrams

Fuel System:

Fuel tank, fuel pump, fuel filter, fuel lines, fuel injectors, pressure regulator

Cooling System:

Radiator, cooling fan, thermostat, water pump, coolant specifications

Exhaust System:

Exhaust pipes, muffler, catalytic converter (if applicable)

Chassis And Body:

Frame, body panels, seat, handlebars, fenders, plastics

Maintenance:

Scheduled maintenance, oil changes, filter replacements, lubrication, adjustments

Troubleshooting:

Diagnostic flowcharts, symptom analysis, common problem identification and solutions

Repair:

Step-by-step instructions for component removal, repair, and reinstallation

Rebuild:

Complete engine and transmission rebuild procedures

Diagnostic Procedures:

Fault code retrieval (if applicable), circuit testing, component testing

Depth:

Professional Technician Level, covering everything from basic checks to complete overhauls

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely searchable text within the PDF

Printability:

Designed for printing individual pages or entire sections

Visuals Quality:

High Quality Photos, Illustrations And Diagrams

Binding:

Not Applicable (Digital Download)

Paper Type:

Not Applicable (Digital Download)

Operating Systems:

Microsoft Windows (95, 98, 98SE, 2000, NT, ME, XP, VISTA, Windows 7) and all Mac computers

Usage Rights:

No expiry date, unlimited personal use after download

⚙️ Engine Specifications

Engine Type:

4-stroke, SOHC, 4-valve

Displacement:

348cc

Bore X Stroke:

83.0 mm x 64.5 mm

Cooling System:

Liquid-cooled

Engine Type:

4-stroke, SOHC, 4-valve

Displacement:

386cc

Bore X Stroke:

83.0 mm x 71.5 mm

Cooling System:

Liquid-cooled

Horsepower Approx 350:

Approx. 21-23 HP (specific figures vary by exact model and testing)

Torque Approx 350:

Approx. 20-22 lb-ft (specific figures vary by exact model and testing)

Horsepower Approx 400:

Approx. 25-27 HP (specific figures vary by exact model and testing)

Torque Approx 400:

Approx. 24-26 lb-ft (specific figures vary by exact model and testing)

Fuel Delivery:

Electronic Fuel Injection (EFI)

Fuel Type:

Unleaded gasoline

🔧 Transmission

Type:

Automatic Transmission (AT) with Ultramatic® CVT system

Drive Modes:

2WD/4WD selectable with Electric Power Steering (EPS) on some models

Features:

High/Low range, Neutral, Reverse

Transmission Fluid:

Yamalube High-Performance Gear Oil (specific grade to be confirmed in manual, typically SAE 80W-90 or similar)

📐 Dimensions

Length:

Approx. 76.2 inches (1935 mm)

Width:

Approx. 42.5 inches (1080 mm)

Height:

Approx. 45.3 inches (1150 mm)

Wheelbase:

Approx. 49.4 inches (1255 mm)

Ground Clearance:

Approx. 7.1 inches (181 mm)

Dry Weight Approx 350:

Approx. 562 lbs (255 kg)

Dry Weight Approx 400:

Approx. 573 lbs (260 kg)

Towing Capacity:

903 lbs (410 kg)

Front Tire Size:

AT25x8-12

Rear Tire Size:

AT25x10-12

🛡️ Safety Features

Notes:

ATVs are inherently dangerous vehicles. Always wear appropriate safety gear, including a helmet, eye protection, gloves, and sturdy footwear. Operate responsibly and follow all posted trail rules and regulations.

💡 Technology Features

Features:

Basic instrumentation (speedometer, odometer, fuel gauge, engine hour meter). No advanced infotainment systems expected for this model and era.

Features:

Electric Power Steering (EPS) available on some models for reduced steering effort, especially at low speeds and with larger tires.

Features:

Not applicable. Primarily mechanical and electrical systems.

🔧 Maintenance

Engine Oil Change:

Every 600 miles or 6 months, whichever comes first (refer to manual for exact specification and type).

Air Filter Cleaning:

Check every 300 miles, clean or replace as needed.

Spark Plug Inspection:

Inspect every 600 miles, replace as needed (specific plug type will be in the manual).

Engine Oil:

Yamalube 4-stroke Motorcycle Oil SAE 10W-40 (or equivalent API SG or higher, JASO MA standard). Capacity: 2.20 L (2.32 US qt) with filter change.

Coolant:

Permanent type anti-freeze coolant (50/50 mixture with distilled water). Capacity: 2.20 L (2.32 US qt).

Common Wear Items:

CV joint boots, brake pads, front suspension bushings, starter motor brushes (typical for ATVs of this age).

Electrical Gremlins:

Can occur due to water ingress, vibration, and age. Wiring harness integrity and grounds are crucial.

Efi Related:

Fuel pump, injectors, and TPS (Throttle Position Sensor) can be sources of issues if not maintained or if contaminants are present.

📚 Vehicle History

Manufacturer:

Yamaha Motor Company

Specialty:

World-renowned for motorcycles, marine products, and powersports vehicles, including ATVs.

Bruin Series:

The Bruin series was Yamaha's entry into the utility-focused ATV market, offering a balance of performance and comfort for recreational and light-duty work. It served as a predecessor or companion to models like the Grizzly.

Production Years:

2004-2006 for these specific manual coverage years. The Bruin model itself had a broader production run.

🏆 Awards & Recognition

Market Reputation:

The Bruin was generally well-regarded for its reliability and capability within its class during its production run.