2000-2001 Yamaha Big Bear 400 ATV Service Manual

2000–2001 Yamaha Big Bear 400 Service Manual Features

• Covers 2000–2001 Yamaha Big Bear 400 YFM400FWN series, including 5FU1 and 5FU2 California-compliant sub-models
• Official Yamaha publication P/N LIT-11616-13-22 (first edition, June 1999) spanning 100 pages
• Contains 41 detailed technical data tables, including tightening torque values, lubrication charts, and wiring references
• Instant download — get immediate PDF access right after purchase to keep your project moving
• High-resolution digital format preserves critical exploded-view details for precision work
• Fully indexed and searchable PDF helps you find exact chapters and specs in seconds

Document Scope and Technical Highlights

Yamaha Big Bear 400 Manual Structure

Whether you run a professional shop or wrench in your home garage, having accurate reference data is critical for a safe, reliable build. This official OEM document organizes technical specifications into nine core sections: general information, comprehensive specifications, periodic maintenance, engine overhaul, carburetion, drivetrain, chassis, electrical systems, and troubleshooting. Instead of guessing, you get direct access to factory-approved disassembly and reassembly parameters for the 5-speed transmission and constant mesh system. Because this manual is an instant download, you can pull up the illustrated symbol keys for required lubricants and special tools straight to your tablet or laptop right at the workbench. Before beginning any heavy tear-downs, always verify that your equipment is properly secured and strictly follow the documented load and torque parameters to ensure workshop safety.

Specification and Reference Data

Accurate tolerances make or break a rebuild. The manual lays out detailed technical specifications for the 386 cc air-cooled engine, mapping out exactly what you need for valve clearances, piston-to-cylinder tolerances, and timing chain limits. Intake valve clearance is factory-set at 0.06–0.10 mm. Need fastener specs? You will find comprehensive torque tables covering M6 through M35 hardware in both Nm and ft-lb. Electrical diagnostics are just as precise. The guide delivers baseline testing values for the C.D.I. unit, 14 A rectifier, and the complete charging system. Furthermore, it details exact fluid capacities to prevent overfilling: 3.5 L total for the engine oil (verified between dipstick marks), and 0.2 L for the differential gear case.