Vehicle Type:
Mid-size Utility ATV (All-Terrain Vehicle)
Target Audience:
Recreational riders, utility users, farmers, hunters.
Competitors:
Honda FourTrax, Kawasaki Bayou/Brute Force, Polaris Sportsman, Suzuki KingQuad.
Design:
Rugged, reliable, user-friendly operation, suitable for various terrains.
Powertrain:
Proven air-cooled engine, automatic transmission for ease of use.
Primary Coverage:
Complete Official Factory Service / Repair / Workshop Manual
Additional Coverage:
Troubleshooting, diagnostics, maintenance, repair, adjustments, specifications
Estimated Page Count:
Highly comprehensive, typically 300-500+ pages for this type of manual (exact count not provided in product info)
Type:
Factory Service Manual / Workshop Manual
Language:
English (standard for official Yamaha factory manuals)
Engine:
Complete engine disassembly, assembly, tuning, lubrication, cooling system, fuel system (carburetor), ignition system, exhaust system.
Transmission:
Automatic transmission (Ultramatic®), gearcase, drive shaft, differential, maintenance, and repair.
Chassis:
Frame, suspension (front and rear), steering system, wheels, hubs, bearings.
Brakes:
Hydraulic disc brakes (front and rear), brake system components, maintenance, bleeding procedures, specifications.
Electrical:
Wiring diagrams, lighting system, battery, charging system (stator, regulator/rectifier), starter system, instrumentation, switches, fuses.
Fuel System:
Carburetor (likely Mikuni), fuel tank, fuel lines, fuel filter, fuel pump (if applicable).
Cooling System:
Air-cooled system, cooling fins, component checks.
Bodywork And Trim:
Body panels, fenders, racks, seat, storage compartment, plastics.
Maintenance:
Oil changes, filter replacements, spark plug maintenance, air filter cleaning/replacement, brake fluid changes, lubrication points, chain adjustment (if applicable to drive system).
Troubleshooting:
Systematic diagnostic procedures for common and uncommon problems, fault finding charts.
Repair:
Step-by-step repair instructions for all major components, including engine rebuilds, transmission overhauls, suspension repairs, and electrical system fixes.
Adjustments:
Carburetor tuning, valve clearance adjustments, brake lever/pedal free play, throttle cable adjustment.
Disassembly Assembly:
Detailed instructions for dismantling and reassembling all vehicle components.
Depth:
Comprehensive (Factory Level)
Detail Level:
Includes detailed exploded diagrams, torque specifications, clearances, diagnostic codes, and special tool requirements.
Type:
Four-stroke, SOHC, Air-cooled
Bore X Stroke:
Approx. 83mm x 64.5mm (typical for this engine)
Compression Ratio:
Approx. 9.2:1 (typical)
Valvetrain:
SOHC (Single Overhead Camshaft), 2 valves
Horsepower:
Estimated 20-25 HP (varies by specific model year and tuning)
Torque:
Estimated 25-30 lb-ft (varies)
Carburetor Model:
Likely Mikuni BSR33 (33mm constant velocity)
Fuel Type:
Unleaded gasoline (87 octane or higher recommended)
Fuel Tank Capacity:
Approx. 3.2 US gallons (typical)
Length:
Approx. 76 inches (1930mm)
Width:
Approx. 43.5 inches (1105mm)
Height:
Approx. 45.7 inches (1160mm)
Wheelbase:
Approx. 49.2 inches (1250mm)
Dry Weight:
Approx. 560 lbs (254 kg) (varies by configuration)
Ground Clearance:
Approx. 6.3 inches (160mm)
Front Rack Capacity:
Approx. 88 lbs (40 kg)
Rear Rack Capacity:
Approx. 176 lbs (80 kg)
Towing Capacity:
Approx. 1102 lbs (500 kg)
Vehicle Safety Standards:
Designed to meet relevant ATV safety standards (e.g., ANSI/SVIA standards where applicable).
Braking System:
Hydraulic disc brakes front and rear for effective stopping power.
Suspension:
Independent front suspension and swingarm rear suspension provide stability and control.
Throttle Limiter:
May be present on some models for newer riders or specific applications.
Lighting:
Dual headlights, brake light, and taillight for visibility.
Hand Grips:
Textured hand grips for secure control.
Footwells:
Wide, rugged footwells with drainage and heel guards.
Engine Oil Change:
Every 100 hours or 6 months (whichever comes first), or more frequently under severe use.
Oil Filter Replacement:
At every engine oil change.
Air Filter Cleaning:
Every 50 hours or 3 months, replace if damaged.
Spark Plug Inspection:
Every 100 hours or 6 months.
Brake Fluid Change:
Every 12 months or as needed if contaminated.
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-30 API SE or SF.
Engine Oil Capacity:
Approx. 1.7 US qt (1.6 L) with filter change.
Transmission Gear Oil:
Yamaha "GEAR OIL 10W-30" (or equivalent).
Transmission Gear Oil Capacity:
Approx. 0.70 US qt (0.65 L).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Carburetor Fouling:
Common in ATVs that sit for extended periods; requires cleaning and proper fuel storage.
Cvt Belt Wear:
Normal wear item; requires periodic inspection and replacement based on mileage/usage.
Plastic Components:
Can become brittle with age and sun exposure; requires careful handling during maintenance.
Cooling System:
While air-cooled, ensuring cooling fins are clean is crucial for preventing overheating.
Manufacturer:
Yamaha Motor Corporation
Legacy:
Yamaha has a long and successful history in powersports, known for reliability and performance.
Predecessors:
The Bruin 350 is part of Yamaha's lineage of popular utility ATVs, building on platforms like the Wolverine and Big Bear.
Key Updates:
Typically received minor updates over its production run, focusing on refinement rather than radical redesigns.
Production Years:
Approximately 2004-2006 (model years, actual production may vary slightly)
Manufacturing Location:
Likely manufactured in Japan or North America by Yamaha.
