Market Segment:
Entry-level to mid-range utility ATV, known for reliability and ease of maintenance.
Target Audience:
Recreational riders, farmers, and light utility users.
Key Competitors:
Honda TRX300EX/TRX350, Kawasaki Bayou 300/300SX, Suzuki LT-F300 King Quad.
Competitive Advantage:
Torque-rich engine, comfortable suspension, robust build quality, proven reliability.
Features Highlight:
Proven 348cc air-cooled SOHC engine, automatic transmission, selectable 2WD/4WD, independent front suspension.
Manual Value Proposition:
Provides comprehensive diagnostic, repair, and maintenance information, enabling owners to perform most service tasks, saving time and money.
Engine:
Complete engine overhaul, assembly, disassembly, cylinder head, pistons, crankshaft, lubrication system, cooling system, timing components.
Fuel System:
Carburetor tuning and rebuild, fuel pump, fuel lines, fuel tank.
Transmission:
Clutch operation, gear shifting mechanism, transmission overhaul, internal components.
Drivetrain:
Driveshaft, differential, CV joints, axle shafts, wheel hubs.
Suspension:
Front and rear suspension systems, shock absorbers, A-arms, bushings, steering knuckles.
Brakes:
Front and rear brake systems, hydraulic lines, master cylinders, calipers, brake pads, brake fluid specifications.
Electrical System:
Wiring diagrams, ignition system, starting system, charging system (stator, regulator/rectifier), lighting, battery maintenance, fuses, relays.
Steering:
Steering column, tie rods, steering linkage, steering wheel.
Body Chassis:
Frame inspection and repair, body panels, plastics, seating, handlebars, fenders.
Cooling System:
Radiator, fan, coolant, hoses, thermostat.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustments, spark plug replacement, valve adjustments, fluid checks.
Troubleshooting:
Diagnostic procedures for common problems, fault finding, error codes (if applicable).
Repair:
Detailed step-by-step repair instructions for all major components and systems.
Rebuilds:
Complete engine and transmission rebuild procedures with torque specifications.
Specifications:
Torque specifications for all fasteners, clearance specifications, electrical resistance values.
Wiring Diagrams:
Comprehensive electrical system wiring schematics.
Depth:
Professional level, covering complete disassembly, overhaul, and reassembly of all major mechanical and electrical systems.
Crash Safety Ratings:
N/A (ATVs are not subject to standard automotive crash testing)
Braking System:
Front: Dual hydraulic discs; Rear: Single hydraulic disc.
Parking Brake:
Mechanical parking brake (typically operated by lever on handlebar).
Lighting:
Dual 30W headlights, 15W taillight/stoplight.
Operator Controls:
Handlebar steering, throttle lever, brake levers, gear shifter.
Engine Oil Change:
Every 100 hours or annually, whichever comes first. (Check manual for specific recommendations).
Air Filter Cleaning:
Every 50 hours or as needed based on conditions.
Spark Plug Replacement:
Every 250 hours or annually.
Valve Adjustment:
Every 250 hours or annually.
Brake Fluid Flush:
Every 2 years.
Engine Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher, SE/SF engine oil)
Engine Oil Capacity:
2.1 US qt (2.0 L) with oil filter change.
Gear Oil Type:
Yamalube Gear Oil (or equivalent SAE 80 Hypoid Gear Oil)
Gear Oil Capacity:
0.30 US qt (0.28 L) for rear differential.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Coolant Type:
Permanent type antifreeze (ethylene glycol based) with demineralized water (50/50 mix).
Common Wear Items:
Brake pads, wheel bearings, tie rod ends, bushings, spark plug, drive belt (if applicable to later models).
Engine Performance Degradation:
Can occur due to carburetor issues (clogging), worn piston rings, or valve seat wear over time.
Electrical Issues:
Stator failure, regulator/rectifier issues, or corroded connections can impact charging system performance.
Suspension Wear:
Bushings and ball joints in the suspension can wear out, leading to play and poor handling.
Brand Focus:
Yamaha Motor Corporation is renowned for its motorcycles, ATVs, marine products, and musical instruments.
Atv Legacy:
Yamaha has been a pioneer in the ATV industry since the 1980s with iconic models like the 'Tri-Z' and 'Blaster'.
Predecessor:
Yamaha YFM350ER ('Big Bear' 2WD version, introduced earlier)
Key Advancements In Gen:
Introduction of 4WD capability, independent front suspension, and updated styling compared to earlier models.
Production Period For Model:
1995-2009 (YFM350FX designation)
Manufacturing Location:
Japan (typically)
