Official Yamaha YFM350XA Warrior 350 ATV Service Manual - Dealer Technician Edition 1990

Yamaha YFM350XA Warrior 350 ATV Service Manual - Comprehensive Dealer Technician Edition

Master the maintenance and repair of your Yamaha Warrior 350 with the definitive authority used by factory-trained technicians. This professional-grade service manual for the Yamaha YFM350XA (Warrior 350) series is not just a basic owner's guide—it is an exhaustive technical resource designed to keep your ATV performing at its peak on every trail.

Whether you are performing a simple oil change or a complete engine overhaul, this manual provides the granular detail required for precision work. It transitions from high-level specifications to step-by-step disassembly, ensuring that every bolt, gasket, and circuit is accounted for.

Key Technical Features

• Professional Insight: Originally authored by Yamaha Motor Company for dealer mechanics, covering everything from mechanical concepts to advanced repair technology.
• Detailed Exploded Diagrams: Every chapter features high-resolution exploded views, allowing you to visualize part relationships and assembly sequences before you pick up a wrench.
• Sequential Procedures: Tasks are organized in a logical, step-by-step format with specific markers for particularly important safety procedures and technical "pro-tips."
• Comprehensive Electrical Mapping: Includes full circuit diagrams and troubleshooting paths for the C.D.I. Magneto ignition system, charging circuits, and signal systems.
• Specialized Tooling Data: Complete list of Yamaha special tools (with part numbers) required for accurate tune-ups and engine service, such as the Rotor Holder (P/N YU-01235) and Flywheel Puller (P/N YM-01404).

Vehicle Identification & Models

This manual is specifically engineered for the high-performance Yamaha Warrior 350 ATV series. It includes critical identification data to ensure you are using the correct specs for your machine:

• Model Code: 3GD5
• Starting Serial Number (VIN): JY43GDW0LC051101 (stamped on the left side of the frame)
• Engine Starting Serial Number: 3GD-051101 (stamped on the right side of the engine)

Extensive Content Coverage

• Chapter 1: General Information: Machine identification, special tools for tune-ups/engine/chassis/electrical, and essential preparation for disassembly.
• Chapter 2: Specifications: Detailed torque settings, engine dimensions (83 x 64.5 mm bore/stroke), 6-speed forward/1-speed reverse transmission ratios, and fluid capacities (2.5L with filter change).
• Chapter 3: Periodic Inspection and Adjustment: Comprehensive maintenance schedules, valve clearance settings (0.06~0.10mm Intake / 0.16~0.20mm Exhaust), and ignition timing checks.
• Chapter 4: Engine Overhaul: Total breakdown of the 348cc 4-stroke SOHC engine, including cylinder head resurfacing, piston ring end gap specs, and crankshaft installation.
• Chapter 5: Carburetion: Deep dive into the Mikuni BTM36SH carburetor, featuring float height adjustments and jetting specifications.
• Chapter 6: Chassis: Service procedures for the dual front disc brakes, rear swingarm (Link Suspension), and steering system toe-in adjustments.
• Chapter 7: Electrical: Testing procedures for the 12V 12AH battery, starter motor output (0.7 Kw), and lighting system beam adjustments.
• Chapter 8: Troubleshooting: Expert diagnostic charts for starting failures, poor idle performance, and faulty gear shifting.

Equip your garage with the same knowledge used by Yamaha experts. This manual is the ultimate tool for ensuring the longevity, safety, and reliability of your Yamaha Warrior 350 across all terrains.