This manual covers the YFM350X, commonly known as the Warrior, a sport All-Terrain Vehicle (ATV) produced for the model years 1997 through 2002. Engineered for performance and agility, the YFM350X features a robust 348cc air-cooled, four-stroke engine and a 5-speed manual transmission with reverse. Its design prioritizes a balance of power and handling, making it a capable machine for recreational sport riding. The reputation for reliability is a cornerstone of the Warrior's appeal, offering riders a durable and responsive ATV experience. This comprehensive workshop service manual provides essential information for the maintenance, diagnosis, and repair of the YFM350X Warrior. It details engine assembly and disassembly, drivetrain components, chassis systems, braking, and electrical systems. Included are routine maintenance procedures, detailed repair instructions, troubleshooting guides, and critical technical specifications. This resource is invaluable for owners, mechanics, and technicians seeking to ensure the longevity and optimal performance of their YFM350X ATV. 🏷️ Basic Information Identification Make: Yamaha Model: YFM350X Model Nickname: Warrior Vehicle Type: All-Terrain Vehicle (ATV) Generation Generation Code: First Generation (Pre-2004) Codes Vin Code: Model specific; typically starts with JY 👋 Introduction Market Position Atv Segment: Sport ATV, known for its performance and handling in its era. Competitive Analysis Key Competitors: Honda TRX300EX/400EX, Suzuki LT-Z250/400, Kawasaki Mojave 250. Key Features Performance Focus: The YFM350X Warrior was designed for sport riding, offering a good balance of power, agility, and suspension travel for its time. Reliability: Yamaha's reputation for robust and reliable engines is reflected in the YFM350X. Value Proposition Manual Value: Essential for owners and technicians to maintain, diagnose, and repair the YFM350X efficiently, ensuring longevity and optimal performance. 📋 Manual Details Coverage Areas Model Years Covered: 1997, 1998, 1999, 2000, 2001, 2002 Engine Variants Covered: 348cc Air-Cooled SOHC 4-Stroke Single Cylinder Page Count Estimated Page Count: 300-500 pages (typical for comprehensive service manuals) Manual Type Manual Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Systems: Engine assembly, disassembly, inspection, tuning, carburetor, cooling system, lubrication system, valve train, piston, crankshaft, cylinder head, cylinder block. Drivetrain Systems: Clutch (automatic centrifugal), transmission (5-speed with reverse), final drive, drive shafts, differential (if applicable, though typically solid rear axle). Chassis Systems: Frame inspection and repair, suspension (front and rear), steering system, wheels, tires. Braking Systems: Front and rear brake systems (hydraulic disc brakes), brake caliper service, brake fluid replacement, master cylinder. Electrical Systems: Ignition system, charging system (stator, rectifier/regulator), lighting, battery, starter motor, wiring diagrams, switches, fuses. Fuel System: Fuel tank, fuel lines, fuel filter, carburetor (Mikuni VM32SS or similar), fuel pump (if applicable). Exhaust System: Exhaust pipe, muffler, gaskets. Body And Trim: Fenders, plastic body panels, seat, handlebars, controls. Procedures Included Maintenance Procedures: Oil change, filter replacement, air filter cleaning/replacement, spark plug replacement, chain adjustment, brake bleeding, valve clearance adjustment. Repair Procedures: Engine overhaul, transmission rebuild, carburetor overhaul, suspension component replacement, brake system repair, electrical component testing and replacement. Troubleshooting Guides: Diagnostic charts, common problems and solutions, symptom-based troubleshooting. Technical Specifications: Torque specifications, clearances, measurements, wiring schematics, diagnostic codes (if applicable). Technical Depth Depth Of Coverage: Comprehensive, covering from routine maintenance to complete engine and transmission overhauls, including detailed diagnostic procedures and specifications. 📊 Manual Specifications File Format File Format Details: Adobe PDF; Searchable text, printable pages, bookmarked sections for easy navigation. Print Quality Print Quality: High-resolution digital reproduction of original factory manual content. Binding Type Binding Type For Download: N/A (Digital PDF) Paper Type Paper Type For Download: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, SOHC, air-cooled Displacement: 348 cc (21.2 cu in) Bore X Stroke: 81 mm x 68 mm (approximate) Compression Ratio: 9.7:1 (typical) Valve Configuration: SOHC, 2 valves Performance Horsepower: Approximately 20-22 HP at 6,500 RPM (estimated, subject to variation) Torque: Approximately 21-23 lb-ft at 5,000 RPM (estimated, subject to variation) Fuel System Carburetor Model: Mikuni VM32SS (or similar specification) Fuel Type: Unleaded gasoline, minimum octane rating 87 Fuel Tank Capacity: 2.6 US gal (9.8 L) Cooling System Cooling Method: Air-cooled Lubrication System Oil Type: Yamalube 4 (or equivalent API SG or higher, SAE 10W-30 or 20W-40 based on temperature) Oil Capacity: Approx. 1.8 US qt (1.7 L) with filter change Oil Filter Part Number: Yamaha 5H0-13440-90-00 (or equivalent) 🔧 Transmission Standard Transmission Type: Constant mesh, 5-speed manual with reverse Clutch Type: Wet, multiple-disc, automatic centrifugal Final Drive: O-ring sealed chain, 520 pitch Features Gear Ratios: Specific ratios provided in manual, typically ranging from approx. 2.8 to 0.9 for forward gears and a specific reverse ratio. Transmission Oil Type: Yamalube 4 (or equivalent API SG or higher, SAE 10W-30 or 20W-40 based on temperature) Transmission Oil Capacity: Approx. 0.9 US qt (0.85 L) 📐 Dimensions Exterior Overall Length: Approx. 70.9 inches (1798 mm) Overall Width: Approx. 43.7 inches (1110 mm) Overall Height: Approx. 43.1 inches...