Market Segment:
Sport/Recreational ATV
Key Competitors:
Honda FourTrax, Suzuki LT-4WD, Kawasaki Bayou
Vehicle Selling Points:
Powerful engine for its class, agile handling, reliable Yamaha build quality
Manual Accuracy:
Factory-derived data ensures the highest level of accuracy for repairs and diagnostics.
Dealer Equivalence:
Same information used by authorized Yamaha service technicians.
Diy Empowerment:
Empowers owners to perform their own maintenance and repairs, saving time and money compared to dealership service.
Systems Covered:
General Information, Maintenance, Engine Removal and Installation, Engine Fuel System, Engine Lubrication and Cooling, Engine Combustion System, Transmission System, Front Wheel and Steering System, Rear Wheel System, Fenders and Exhaust Pipe, Electrical System, Troubleshooting
Specific Engine Coverage:
Detailed procedures for cylinder head, piston, crankshaft, camshaft, valves, timing system, and all associated components.
Specific Fuel System Coverage:
Carburetor overhaul, adjustment, fuel filter replacement, fuel line inspection.
Specific Transmission Coverage:
Clutch adjustment and replacement, gear selection mechanism, final drive inspection and maintenance.
Specific Electrical System Coverage:
Wiring diagrams, ignition system troubleshooting (CDI, coil), lighting system diagnostics, starter motor and charging system checks.
Procedures Included:
Diagnosis, Service, Maintenance, Repair, Component Removal/Installation, Troubleshooting
Specific Procedure Engine Rebuild:
Complete engine disassembly, inspection, repair, and reassembly with torque specifications.
Specific Procedure Troubleshooting:
Systematic approach to diagnosing common problems, including electrical shorts, fuel delivery issues, and mechanical failures.
Specific Procedure Maintenance:
Step-by-step guides for routine maintenance tasks such as oil changes, filter replacements, chain adjustments, and brake system service.
Technical Depth:
Comprehensive, dealer-level technical information
Engine Type:
Four-stroke, SOHC, air-cooled
Bore X Stroke:
83.0 mm x 64.5 mm
Horsepower Estimated:
Approximately 20-25 HP (exact figures often not published for ATVs of this era)
Torque Estimated:
Estimated peak torque around 18-20 lb-ft
Ignition System:
CDI (Capacitor Discharge Ignition)
Spark Plug Gap:
Refer to manual for specific plug and gap (e.g., NGK BR7ES or similar, gap typically 0.7-0.8 mm)
Carburetor Type:
Mikuni VM Series (likely 33mm or similar)
Fuel Type:
Unleaded Gasoline
Fuel Tank Capacity:
Approximately 3.0 gallons (11.4 L)
Oil Type:
Yamaha Motorcycle Oil (or equivalent 4-stroke motorcycle oil)
Oil Capacity With Filter Change:
Approximately 1.8 US qt (1.7 L)
Cooling System:
Air-cooled
Drive Type:
Shaft drive (2WD)
Transmission Type:
5-speed constant mesh with automatic clutch and reverse
Clutch Type:
Automatic wet multiple-disc
Transmission Oil Type:
Yamalube SAE 10W-30 API SE or SF (or equivalent)
Transmission Oil Capacity:
Approximately 0.8 US qt (0.75 L)
Length:
Approximately 72.0 inches (1829 mm)
Width:
Approximately 42.5 inches (1080 mm)
Height:
Approximately 43.3 inches (1100 mm)
Dry Weight:
Approximately 370 lbs (168 kg)
Front Tire Size:
AT22x7-10
Rear Tire Size:
AT22x10-9
Bolt Pattern Front:
4x110mm
Bolt Pattern Rear:
4x110mm
Front Suspension Type:
Independent double-wishbone with adjustable pre-load shocks
Rear Suspension Type:
Swingarm with adjustable pre-load monoshock
Front Brake Type:
Dual hydraulic disc
Rear Brake Type:
Single hydraulic disc
Throttle Limiter:
Thumb throttle with safety limiter screw (adjustable)
Parking Brake:
Mechanical parking brake lever
Kill Switch:
Handlebar-mounted engine kill switch
Lighting:
Dual front headlights, single rear taillight/brake light
Engine Oil Change Interval:
Every 1,000 km (600 miles) or 6 months, whichever comes first (refer to manual for exact specification)
Spark Plug Inspection:
Check every 6 months or as needed
Air Filter Cleaning:
Clean every 3 months or as needed, depending on operating conditions
Gearbox Oil Change Interval:
Every 1,000 km (600 miles) or 6 months
Engine Oil Viscosity:
SAE 10W-30 API SE or SF
Cooling System Fluid:
Not applicable (air-cooled)
Common Wear Items:
Clutch components, brake pads, wheel bearings, carburetor jetting issues, starter motor reliability
Carburetor Tuning:
Can be sensitive to altitude and temperature changes, requiring periodic jetting adjustments for optimal performance.
Reverse Gear Engagement:
Some models may experience occasional difficulty engaging reverse gear if not properly maintained or if shift linkage is worn.
Yamaha Atv Legacy:
Yamaha pioneered the modern ATV with the original 'Tri-Z' and 'Banshee' models, establishing a reputation for performance and durability.
Warrior Lineage:
The Warrior 350, introduced in 1987, was Yamaha's entry into the sport utility/recreational ATV market, bridging the gap between utility and pure sport models. It became a benchmark for its class.
Production Period Start:
1987
Production Period End:
2004 (for the Warrior 350 line)
Manufacturing Location:
Japan
