Positioning:
The Yamaha YFM350 Warrior was a popular sport ATV known for its balance of performance and versatility, appealing to recreational riders and entry-level racers.
Competitors:
Competed directly with models like the Suzuki LT250R, Honda TRX250R, and Kawasaki Mojave 250, offering a reliable and accessible option in the 350cc class.
Features:
Proven 348cc air-cooled engine, reliable shaft drive, comfortable seating, agile handling, and a robust chassis.
General Coverage:
Comprehensive service and repair information for the Yamaha YFM350 Warrior ATV.
Specific Sections:
Engine, Transmission, Drivetrain, Suspension, Brakes, Electrical System, Fuel System, Cooling System, Frame, Bodywork, Troubleshooting, Maintenance.
Estimated Pages:
Likely 200-300 pages (typical for detailed service manuals of this era, exact count not provided in product info).
Type:
Service Repair Manual
Engine:
Disassembly, assembly, inspection, repair of all engine components including carburetor, ignition, lubrication, and cooling.
Transmission Drivetrain:
Clutch, gearbox, drive shaft, rear axle, wheel bearings, and chain maintenance.
Brakes:
Hydraulic brake system inspection, bleeding, pad replacement, caliper service, master cylinder overhaul.
Suspension:
Front and rear suspension inspection, fork seal replacement, shock absorber service, steering components.
Electrical:
Wiring diagrams, lighting system, ignition system, charging system, battery maintenance, starter motor, troubleshooting electrical faults.
Fuel System:
Fuel tank, fuel lines, fuel filter, carburetor adjustment and cleaning.
Maintenance:
Routine maintenance checks, oil changes, filter replacements, chain adjustment, spark plug service, pre-ride inspections.
Troubleshooting:
Step-by-step diagnostic procedures for common and uncommon issues, symptom-based troubleshooting guides.
Repair:
Detailed instructions for engine rebuilds, transmission overhauls, suspension repairs, and electrical component replacement.
Adjustments:
Carburetor tuning, clutch adjustment, brake lever adjustment, chain slack adjustment.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds. Includes specifications and tolerances for precise repair.
Engine Type:
Four-stroke, SOHC, air-cooled
Bore X Stroke:
83 mm x 64.5 mm (typical for the 348cc engine, check specific model year for exact)
Compression Ratio:
Approximately 9.3:1 (typical)
Horsepower:
Estimated 22-26 hp (varies by year and tuning, manual will provide precise figures).
Torque:
Estimated 20-22 lb-ft (varies by year and tuning, manual will provide precise figures).
Carburetor:
Mikuni VM32SS (typical for most Warrior models).
Fuel Type:
Unleaded gasoline (91 octane or higher recommended).
Ignition System:
CDI (Capacitor Discharge Ignition).
Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher) motorcycle oil.
Oil Capacity:
Approximately 1.7 L (dry), 1.5 L (with filter change). Manual will confirm exact.
Overall Length:
Approximately 1850 mm (72.8 in) (varies by model year).
Overall Width:
Approximately 1170 mm (46.1 in) (varies by model year).
Overall Height:
Approximately 1090 mm (42.9 in) (varies by model year).
Dry Weight:
Approximately 214 kg (472 lbs) (varies by model year).
Front Tire Size:
AT22x7-10 (typical).
Rear Tire Size:
AT22x10-9 (typical).
Wheelbase:
Approximately 1280 mm (50.4 in) (varies by model year).
Oil Change:
Every 3,000 km (1,800 miles) or 6 months, whichever comes first. (Refer to manual for exact intervals).
Air Filter Cleaning:
Every 1,000 km (600 miles) or as needed based on conditions. (Refer to manual).
Spark Plug Check:
Every 3,000 km (1,800 miles). (Refer to manual).
Valve Clearance Check:
Every 6,000 km (3,600 miles). (Refer to manual).
Engine Oil:
Yamalube 4 (or equivalent SAE 10W-30 API SG or higher).
Brake Fluid:
DOT 3 or DOT 4 hydraulic brake fluid.
Coolant Type:
N/A (Air-cooled engine).
Common Wear Items:
Clutch plates, wheel bearings, brake pads, and suspension bushings are common wear items on performance ATVs.
Carburetor Issues:
Carburetor jetting can be sensitive to altitude and modifications; occasional cleaning and adjustment may be needed.
Drive Chain Maintenance:
Regular cleaning, lubrication, and adjustment of the drive chain is crucial for longevity and performance.
Yamaha Atv Legacy:
Yamaha has a long-standing reputation for building durable and high-performance ATVs, pioneering many features in the industry.
Warrior Lineage:
The Warrior was part of Yamaha's successful ATV lineup, known for its sport-oriented design and performance, evolving over several model years.
Production Years:
Originally introduced in the early 1980s, with various iterations and updates through the early 2000s. Manual likely covers models from the late 1980s to early 2000s.
