Vehicle Segment:
        
        
            Utility All-Terrain Vehicle (ATV)
        
     
    
        
            Target Audience:
        
        
            Recreational riders, utility users, property owners, agricultural use.
        
     
    
    
        
            Key Competitors:
        
        
            Honda FourTrax, Polaris Sportsman, Arctic Cat 400/500, Suzuki King Quad, Kawasaki Bayou/Prairie.
        
     
    
    
        
            Features:
        
        
            Reliable Yamaha engine, selectable 4WD, automatic transmission, independent front suspension, comfortable seating.
        
     
 
    
    
    
        
            Overall Coverage:
        
        
            Comprehensive repair, maintenance, restoration, and diagnosis
        
     
    
        
            System Coverage Summary:
        
        
            Engine, transmission, chassis, electrical, bodywork, suspension, steering, brakes, fuel system, cooling system, exhaust system, drivetrain.
        
     
    
    
        
            Estimated Page Count:
        
        
            High, likely 500+ pages (based on typical workshop manuals and file size mention)
        
     
    
    
        
            Type:
        
        
            Workshop Repair Manual
        
     
    
        
            Origin:
        
        
            Original Manufacturer (Yamaha)
        
     
    
    
        
            Language:
        
        
            English (implied by product description, typical for international manuals)
        
     
    
    
        
            Digital Format:
        
        
            PDF Download
        
     
    
        
            File Size Potential:
        
        
            Up to 5 GB
        
     
 
    
    
    
        
            Engine:
        
        
            Complete engine overhaul, internal component specifications, timing, ignition, lubrication, cooling, fuel delivery, emissions.
        
     
    
        
            Transmission:
        
        
            Automatic transmission (CVT) disassembly, assembly, adjustments, fluid specifications, troubleshooting.
        
     
    
        
            Drivetrain:
        
        
            Driveshaft, differential (front/rear), 4WD system engagement, wheel hubs, CV joints.
        
     
    
        
            Brakes:
        
        
            Hydraulic system, brake caliper servicing, pad replacement, bleeding procedure, master cylinder, parking brake.
        
     
    
        
            Suspension:
        
        
            Front and rear suspension components, shock absorbers, springs, bushings, alignment specifications.
        
     
    
        
            Steering:
        
        
            Handlebar assembly, steering shaft, tie rods, steering knuckle servicing, lubrication.
        
     
    
        
            Electrical:
        
        
            Wiring diagrams, lighting system, starting system, charging system (alternator/stator), battery maintenance, fuses, relays, ignition system components.
        
     
    
        
            Fuel System:
        
        
            Carburetor (Mikuni BSR33), fuel tank, fuel pump, fuel lines, filters, choke operation.
        
     
    
        
            Cooling System:
        
        
            Radiator, fan, coolant, thermostat, water pump, hose replacement.
        
     
    
        
            Exhaust System:
        
        
            Muffler, exhaust pipe, heat shields, inspection, replacement.
        
     
    
        
            Body And Chassis:
        
        
            Frame inspection, body panels, plastics, seat removal, fender maintenance, rack installation.
        
     
    
    
        
            Maintenance:
        
        
            Regular servicing, oil changes, filter replacements, lubrication points, valve adjustments, spark plug replacement.
        
     
    
        
            Repair:
        
        
            Component removal, installation, replacement, and adjustment for all covered systems.
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic charts, symptom analysis, root cause identification for common problems.
        
     
    
        
            Rebuilding:
        
        
            Detailed instructions for engine and transmission rebuilds.
        
     
    
        
            Diagnostics:
        
        
            Electrical system diagnostics, fuel system checks, engine performance analysis.
        
     
    
        
            Specifications:
        
        
            Torque values, clearances, fluid capacities, electrical resistance, engine specifications.
        
     
    
    
        
            Depth:
        
        
            Factory-level detail suitable for professional technicians and advanced DIY users.
        
     
    
        
            Illustrations:
        
        
            Clear, step-by-step illustrated instructions, exploded views, zoomable illustrations.
        
     
    
        
            Component Breakdowns:
        
        
            Detailed breakdowns of all major and minor components.
        
     
    
        
            Part Identification:
        
        
            Detailed breakdown of all part numbers for every aspect of the vehicle.
        
     
 
    
    
    
        
            Engine Type 350:
        
        
            4-stroke, SOHC, 2-valve, single cylinder
        
     
    
        
            Engine Type 400:
        
        
            4-stroke, SOHC, 4-valve, single cylinder (often a variant of the Raptor 350/660 engine architecture, but 400cc)
        
     
    
        
            Bore X Stroke 350:
        
        
            81.0 mm x 81.2 mm
        
     
    
        
            Bore X Stroke 400:
        
        
            84.0 mm x 70.0 mm (approximate, specific to Bruin 400)
        
     
    
    
        
            Displacement 400:
        
        
            386cc (approximate, specific to Bruin 400)
        
     
    
        
            Cooling System:
        
        
            Liquid-cooled
        
     
    
    
        
            Horsepower 350:
        
        
            Approx. 21 HP @ 6500 RPM
        
     
    
        
            Torque 350:
        
        
            Approx. 20 lb-ft @ 5500 RPM
        
     
    
        
            Horsepower 400:
        
        
            Approx. 23 HP @ 6000 RPM
        
     
    
        
            Torque 400:
        
        
            Approx. 25 lb-ft @ 5000 RPM
        
     
    
    
        
            Fuel Delivery:
        
        
            Carburetor (Mikuni BSR33, single)
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline (87 octane recommended)
        
     
    
        
            Fuel Tank Capacity:
        
        
            3.7 gallons (14 L)
        
     
    
    
        
            Ignition System:
        
        
            CDI (Capacitor Discharge Ignition)
        
     
    
    
        
            Spark Plug 350:
        
        
            NGK CR6HSA or Denso U20FS-U
        
     
    
        
            Spark Plug 400:
        
        
            NGK CR7HSA or Denso U22FS-U (likely)
        
     
 
    
    
    
        
            Engine Oil Change:
        
        
            Every 100 hours or 6 months, whichever comes first.
        
     
    
        
            Air Filter Cleaning:
        
        
            Every 20 hours or 3 months, replace as needed.
        
     
    
        
            Spark Plug Inspection:
        
        
            Every 100 hours or 12 months.
        
     
    
        
            Valve Clearance Check:
        
        
            Every 500 hours or 24 months.
        
     
    
    
        
            Engine Oil Type:
        
        
            Yamaha Genuine Yamalube 4 (or equivalent 4-stroke motorcycle oil) 10W-30 or 10W-40
        
     
    
        
            Engine Oil Capacity:
        
        
            Approx. 2.2 L (2.3 US qt) with filter change
        
     
    
        
            Coolant Type:
        
        
            Yamaha Genuine All-Weather Coolant (or equivalent ethylene glycol based coolant with corrosion inhibitors) mixed 50/50 with distilled water.
        
     
    
        
            Coolant Capacity:
        
        
            Approx. 1.6 L (1.7 US qt)
        
     
    
    
        
            Common Wear Items:
        
        
            Brake pads, suspension bushings, tie rod ends, drive belts (CVT).
        
     
    
        
            Potential Issues:
        
        
            Carburetor gumming if fuel sits too long, occasional starter solenoid issues, CV joint boot tears if not inspected regularly.