Segment:
Mid-size utility ATV, popular for recreational riding, light work, and trail use.
Competitors:
Suzuki King Quad 300/345, Honda FourTrax 350 4x4, Kawasaki Prairie 360 4x4, Polaris Sportsman 400/500 (earlier models).
Engine Type:
Air-cooled, SOHC, 4-stroke, single-cylinder.
Transmission Type:
Ultramatic Automatic Transmission with High/Low range and Reverse.
Drive System:
Shaft drive with on-demand 4WD engagement and locking front differential.
Suspension Front:
Independent double-wishbone with pre-load adjustable shocks.
Suspension Rear:
Swingarm with pre-load adjustable shock.
Braking System:
Hydraulic disc brakes front and rear.
Tire Size Front:
AT25x8-12
Tire Size Rear:
AT25x10-12
Target Audience:
DIY mechanics, ATV owners, technicians seeking in-depth repair and maintenance information.
Benefits:
Empowers owners to perform maintenance and repairs, saving on labor costs and extending vehicle life; provides detailed technical specifications and troubleshooting guidance.
Manual Type:
Service Repair Workshop Manual
Format:
Digital Download (PDF)
Distribution:
Instant Download
Licensing:
Lifetime Use, No Expiry
Platform Compatibility:
Windows and MAC Computers, Tablets, Smartphones
File Format:
PDF (Portable Document Format)
Print Quality:
Printable pages, allowing for paper copies of any section or the entire manual.
Binding Type:
N/A (Digital format, no physical binding)
Paper Type:
N/A (Digital format, no physical paper)
Searchable:
Yes (Typically PDF search functionality available)
Engine:
Comprehensive engine overhaul, diagnostics, tuning, lubrication system, cooling system, fuel system, ignition system, emission control system, engine disassembly and reassembly.
Transmission:
Automatic transmission (Ultramatic) service, maintenance, troubleshooting, removal, installation, internal components, fluid specifications, torque converter.
Drivetrain:
Front and rear differential service, driveshafts, CV joints, propeller shafts, hub assemblies, four-wheel drive engagement system.
Suspension:
Front and rear suspension systems, shock absorbers, springs, control arms, ball joints, bushings, steering knuckle, wheel bearings, geometry adjustments.
Brakes:
Hydraulic brake system, front and rear brake caliper service, brake pad replacement, rotor inspection/replacement, brake fluid flush, bleeding procedures, parking brake mechanism.
Steering:
Steering column, tie rods, steering rack, steering knuckle, universal joints, adjustments, troubleshooting.
Electrical:
Starter system, charging system (generator/stator, regulator/rectifier), battery maintenance, lighting system (headlights, taillights, brake lights), ignition system components, wiring diagrams, fuses, relays, switches, troubleshooting electrical faults.
Body Chassis:
Frame inspection and repair, body panel removal/installation, fenders, racks, seat, handlebar, footrests, plastics, fairings, and trim components.
Fuel System:
Carburetor service, cleaning, adjustment, fuel pump, fuel lines, fuel tank maintenance, fuel filter replacement.
Cooling System:
Radiator, cooling fan, thermostat, coolant specifications, flushing, leak testing.
Routine Maintenance:
Oil changes, filter replacements, tire pressure checks, chain/belt adjustments (if applicable), battery checks, general inspection checklists.
Troubleshooting:
Step-by-step diagnostic procedures for common problems, symptom-based troubleshooting charts, fault code interpretation (if applicable).
Repair Procedures:
Detailed instructions for component removal, installation, rebuilding, and replacement.
Special Tools:
Identification and usage of specific tools required for various repair and maintenance tasks.
Depth Level:
Comprehensive; covers basic maintenance to full engine and transmission rebuilds, including advanced diagnostics and electrical system repairs.
Diagrams Illustrations:
Hundreds of detailed photos and exploded diagrams for clear visual guidance.
Engine Code:
4XF (Likely, specific code may vary slightly).
Engine Type:
Single-cylinder, 4-stroke, SOHC, 2-valve.
Displacement:
348 cc (21.2 cu. in.)
Stroke:
64.5 mm (2.54 in.)
Cooling System:
Forced air cooling with an auxiliary fan.
Horsepower Est:
Approximately 19-22 HP (Varies with tuning and conditions).
Torque Est:
Approximately 18-20 lb-ft (Varies with tuning and conditions).
Carburetor Type:
Mikuni BSR33/1 (Single).
Fuel Type:
Unleaded gasoline (87 octane or higher recommended).
Fuel Tank Capacity:
3.2 U.S. gal. (12 L) including 0.7 U.S. gal. (2.7 L) reserve.
Oil Type:
Yamalube 4 (or SAE 10W-30) API service SG or higher.
Oil Capacity W Filter:
1.70 L (1.80 US qt)
Oil Filter Part Number Yamaha:
5JX-13440-00-00 or equivalent.
Engine Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first.
Oil Filter Replacement:
Every 1,000 km (600 miles) or 6 months, whichever comes first.
Air Filter Cleaning:
Every 500 km (300 miles) or monthly; replace as needed.
Spark Plug Inspection:
Every 1,000 km (600 miles) or 6 months.
Brake Fluid Change:
Every 2 years or as needed.
Transmission Oil Change:
Every 1,000 km (600 miles) or 6 months, whichever comes first.
Engine Oil:
Yamalube 4, SAE 10W-30 (API SG or higher).
Transmission Fluid:
Yamalube 4, SAE 10W-30 (API SG or higher).
Brake Fluid:
DOT 3 or DOT 4.
Carburetor Clogging:
Can be prone to fuel-related clogging if fuel is left standing for extended periods, requiring cleaning or rebuild.
Cv Joint Wear:
High mileage or aggressive use can lead to wear on CV joints and boots, requiring replacement.
Cooling Fan Reliability:
Occasional issues with the electric cooling fan engaging or operating correctly may arise, often related to wiring or the fan motor itself.
Starter Solenoid Failure:
A common point of failure on many ATVs of this era, leading to inability to crank the engine.
Yamaha Atv Legacy:
Yamaha has a long history of producing reliable and innovative ATVs, dating back to the early days of the sport.
Bruin Positioning:
The Bruin 350 4x4 was introduced as a capable mid-size utility ATV, bridging the gap between smaller recreational models and larger, more powerful utility ATVs. It aimed to offer a blend of comfort, ease of use, and reliable 4WD performance.
Predecessors Successors:
The Bruin 350 4x4 succeeded models like the Timberwolf 250 4x4 and was eventually replaced by the Grizzly 350 4x4, which offered a more robust chassis, more features, and a slightly different styling, though sharing many of the same core mechanical components and the same engine family.
