Target Audience:
DIY enthusiasts, independent repair shops, and Yamaha owners seeking to perform maintenance and repairs.
Value Proposition:
Provides significant cost savings by empowering users to perform their own repairs, reducing reliance on expensive dealership services.
Usability:
Designed for ease of use with step-by-step instructions and visual aids.
Accessibility:
Instant download and digital format allow access on various devices (PC, Mac, tablet, smartphone).
Customization:
Printable format allows users to print specific sections or the entire manual as needed.
Engine System:
Engine overhaul, assembly, disassembly, tuning, lubrication, cooling, and performance diagnostics.
Transmission System:
Automatic transmission service, torque converter, gear shift mechanism, lubrication, and troubleshooting.
Drivetrain System:
4x4 system, drive shafts, differentials, CV joints, propeller shafts, and lubrication.
Braking System:
Hydraulic brake system, brake calipers, master cylinder, brake lines, brake pads, rotors, and bleeding procedures.
Suspension System:
Front and rear suspension components, shock absorbers, A-arms, bushings, ball joints, and alignment.
Steering System:
Steering column, tie rods, steering knuckles, and troubleshooting steering issues.
Electrical System:
Ignition system, charging system (stator, regulator/rectifier), starter motor, battery, lighting, wiring diagrams, sensors, and ECU.
Fuel System:
Carburetor operation and adjustment, fuel pump, fuel filter, fuel lines, and emissions control.
Exhaust System:
Exhaust pipes, muffler, heat shields, and emission control components.
Cooling System:
Radiator, cooling fan, thermostat, coolant hoses, and proper coolant type.
Body And Frame:
Body panel removal and installation, frame inspection, seat assembly, and storage compartments.
Routine Maintenance:
Oil changes, filter replacements, spark plug replacement, air filter cleaning/replacement, lubrication points, and valve adjustments.
Diagnostic Procedures:
Troubleshooting common problems, symptom-based diagnostics, and diagnostic codes (if applicable).
Repair Procedures:
Step-by-step instructions for component disassembly, repair, reassembly, and adjustment.
Installation Procedures:
Instructions for installing new parts or accessories.
Specification Tables:
Torque specifications for critical fasteners, clearances, and settings.
Depth Of Information:
Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds.
Troubleshooting Guides:
Detailed troubleshooting sections with flowcharts and step-by-step solutions for common and complex issues.
Illustrations:
Includes detailed diagrams, exploded views, and clear photographs for all procedures.
โ๏ธ Engine Specifications
Engine Type:
Four-stroke, SOHC, single-cylinder, liquid-cooled
Bore X Stroke:
83 mm x 64.5 mm
Horsepower:
Approximately 21 hp @ 6500 rpm (estimated)
Torque:
Approximately 20 lb-ft @ 5500 rpm (estimated)
Fuel Delivery:
Mikuni 33mm constant-velocity carburetor (BSR33/1)
Fuel Type:
Unleaded gasoline (minimum 87 octane)
Ignition Type:
Digital CDI (Capacitor Discharge Ignition)
Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher, JASO certified 4-stroke motorcycle oil)
Oil Capacity:
1.70 L (1.8 US qt) without filter change, 1.80 L (1.9 US qt) with filter change
Coolant Type:
Permanent type antifreeze coolant (50% solution of ethylene glycol and purified water)
Transmission Type:
Automatic transmission with Ultramaticยฎ clutch system
Drive System:
Shaft drive, 2WD/4WD selectable with differential lock.
Gear Selection:
High, Low, Neutral, Reverse, Park
Final Drive:
Bevel gear type
Transmission Fluid:
Yamaha Gear Oil (or equivalent SAE 80 hypoid gear oil)
Transmission Fluid Capacity:
0.28 L (0.30 US qt)
Engine Oil Change:
Every 100 hours or 6 months, whichever comes first.
Air Filter Cleaning:
Every 20 hours or 1 month, depending on operating conditions. Replace as needed.
Spark Plug Check:
Every 100 hours or 6 months. Replace if gap is incorrect or electrode is worn.
Valve Clearance Check:
Every 500 hours or 24 months.
Engine Oil Specification:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher, JASO certified 4-stroke motorcycle oil)
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid
Coolant Specification:
50% Ethylene Glycol Antifreeze and Purified Water
Common Wear Items:
CV boots, tie rod ends, brake pads, wheel bearings, and starter brushes can be common wear items on ATVs used in harsh conditions.
Carburetor Tuning:
Periodic cleaning and adjustment of the carburetor may be necessary due to fuel quality variations or extensive use.
4X4 Actuation:
Ensure proper maintenance of the 4x4 engagement system to prevent wear or malfunction.
Brand Specialization:
Yamaha Motor Company is renowned for its high-performance motorcycles, ATVs, marine products, and musical instruments, with a strong emphasis on engineering and reliability.
Bruin Development:
The Bruin 350 4x4 was Yamaha's answer to the growing demand for capable, mid-size utility ATVs, focusing on a balance of performance, comfort, and durability.
Predecessor:
Successor to models like the Yamaha Timberwolf and Wolverine, it introduced updated technology and chassis design.
Manufacturing Location:
Likely manufactured in Japan or North America by Yamaha Motor Corporation.
