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.