Target Audience:
        
        
            Owners, DIY mechanics, professional repair shops working on Yamaha YFM350 Bruin and YFM400 Kodiak ATVs.
        
     
    
    
        
            Value Proposition:
        
        
            Provides essential technical data, diagnostic procedures, and repair instructions to maintain and repair these popular Yamaha ATVs efficiently and cost-effectively.
        
     
    
    
        
            Manual Type Advantage:
        
        
            This is a workshop service manual, offering detailed repair and diagnostic information beyond an owner's manual.
        
     
    
        
            Download Convenience:
        
        
            Instant access via PDF download allows immediate use without waiting for physical delivery.
        
     
 
    
    
    
        
            Engine:
        
        
            Complete engine overhaul, including cylinder head, piston, crankshaft, connecting rod, valve train, lubrication system, cooling system.
        
     
    
        
            Transmission:
        
        
            Automatic transmission (CVT), gear shifting mechanisms, final drive, differential, driveshafts, propeller shafts.
        
     
    
        
            Drivetrain:
        
        
            4x4 system engagement, front differential, rear differential, driveshafts, CV joints, hub assembly.
        
     
    
        
            Fuel System:
        
        
            Carburetor (Mikuni BSR33/BSR34), fuel tank, fuel pump, fuel filter, fuel lines.
        
     
    
        
            Electrical System:
        
        
            Ignition system, charging system (stator, regulator/rectifier), battery, starter motor, lighting, wiring diagrams, fuses, relays, switches.
        
     
    
        
            Brakes:
        
        
            Hydraulic brake system, front and rear brake calipers, master cylinders, brake lines, brake pads, brake discs.
        
     
    
        
            Suspension:
        
        
            Front and rear suspension, shock absorbers, springs, control arms, ball joints, bushings, steering knuckle.
        
     
    
        
            Steering:
        
        
            Steering column, tie rods, steering rack, steering knuckles, steering wheel, U-joints.
        
     
    
        
            Cooling System:
        
        
            Radiator, cooling fan, water pump, coolant hoses, thermostat.
        
     
    
        
            Exhaust System:
        
        
            Exhaust manifold, muffler, exhaust pipe, heat shields.
        
     
    
        
            Body And Chassis:
        
        
            Frame, body panels, fenders, seat, handlebars, skid plates.
        
     
    
    
        
            Maintenance:
        
        
            Routine inspections, oil changes, filter replacements, spark plug replacement, brake adjustments, chain maintenance (if applicable).
        
     
    
        
            Troubleshooting:
        
        
            Diagnostic procedures for common problems, fault diagnosis, error code interpretation (if applicable).
        
     
    
        
            Repair:
        
        
            Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation.
        
     
    
        
            Overhaul:
        
        
            Complete engine and transmission rebuild procedures.
        
     
    
        
            Adjustments:
        
        
            Carburetor adjustment, valve clearance adjustment, clutch adjustment, brake adjustments.
        
     
    
        
            Wiring Diagrams:
        
        
            Comprehensive electrical system schematics for fault finding and repairs.
        
     
    
    
        
            Depth Of Coverage:
        
        
            Comprehensive from basic maintenance to complete engine and transmission rebuilds.
        
     
 
    
    
    
        
            Engine Type:
        
        
            4-stroke, SOHC, air-cooled
        
     
    
        
            Displacement Yfm350:
        
        
            348cc
        
     
    
        
            Displacement Yfm400:
        
        
            392cc
        
     
    
        
            Bore X Stroke Yfm350:
        
        
            83.0 mm x 64.5 mm
        
     
    
        
            Bore X Stroke Yfm400:
        
        
            86.0 mm x 69.0 mm
        
     
    
    
        
            Horsepower Approx Yfm350:
        
        
            21 HP @ 6500 RPM (est.)
        
     
    
        
            Horsepower Approx Yfm400:
        
        
            23 HP @ 6000 RPM (est.)
        
     
    
        
            Torque Approx Yfm350:
        
        
            20.3 lb-ft @ 5500 RPM (est.)
        
     
    
        
            Torque Approx Yfm400:
        
        
            23.6 lb-ft @ 5000 RPM (est.)
        
     
    
    
        
            Carburetor Model Yfm350:
        
        
            Mikuni BSR33
        
     
    
        
            Carburetor Model Yfm400:
        
        
            Mikuni BSR34
        
     
    
        
            Fuel Type:
        
        
            Unleaded gasoline, 87 octane or higher
        
     
    
        
            Fuel Tank Capacity Approx:
        
        
            3.2 US gal
        
     
 
    
    
    
        
            Engine Oil Change:
        
        
            Every 100 hours or annually, whichever comes first.
        
     
    
        
            Air Filter Cleaning:
        
        
            Check every 20 hours or as needed, clean/replace every 40 hours or annually.
        
     
    
        
            Spark Plug Replacement:
        
        
            Every 100 hours or annually.
        
     
    
        
            Brake Fluid Flush:
        
        
            Every 2 years.
        
     
    
    
        
            Engine Oil Type:
        
        
            Yamalube 4 (or equivalent SAE 10W-30 API SG or higher) ATV specific lubricant
        
     
    
        
            Engine Oil Capacity:
        
        
            1.6 L (1.7 US qt) without filter change, 1.7 L (1.8 US qt) with filter change.
        
     
    
        
            Coolant Type:
        
        
            Permanent type antifreeze coolant (ethylene glycol based) mixed with distilled water, 50/50 ratio.
        
     
    
        
            Brake Fluid Type:
        
        
            DOT 3 or DOT 4 hydraulic brake fluid.
        
     
    
    
        
            Common Wear Items:
        
        
            CV boots, suspension bushings, brake pads, wheel bearings.
        
     
    
        
            Carburetor Cleaning:
        
        
            Periodic cleaning may be required due to fuel quality or debris.
        
     
    
        
            4X4 System Maintenance:
        
        
            Regular inspection and lubrication of CV joints and driveshafts are crucial for longevity.