2000-2001 Yamaha Big Bear 400 ATV Service Manual
Covers YFM400FWNM and YFM400FNMC Big Bear 400 models, with sections on engine overhaul, carburetor, and electrical systems. Includes diagrams and specifications. Ref: LIT-11616-13-22
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Models Covered & Key Technical Specifications
Yamaha Big Bear 400, YFM400FWNM, YFM400FNMC ATV Service Manual: 2000-2001
Big Bear 400 / Yamaha Motor Co., Ltd (LIT-11616-13-22) | Service Manual Archive.
- General Specifications: Features a 386 cc, air-cooled, 4-stroke, SOHC, single-cylinder engine with a 5-speed transmission, delivering 920 kPa (131 psi) at 350 r/min.
- Maintenance Schedule: Recommends checks every 1, 3, 6, and 12 months, including valve clearance adjustments and spark plug inspections for optimal performance.
- Engine Overhaul Procedures: Details the removal and disassembly of key engine components like the carburetor, oil filter, and clutch for comprehensive servicing.
- Chassis Specifications: Includes a steel tube frame, double wishbone front suspension, and Swingarm rear suspension for stable handling.
- Electrical System Overview: Covers ignition, starting, and charging systems, with circuit diagrams and troubleshooting guidance for all electrical components.
- Torque Specifications: Provides precise tightening values for various fasteners, ranging from 10 Nm (7.2 ft-lb) for oil filter covers to 130 Nm (94 ft-lb) for crankshaft nuts.
Professional Workshop Service Manual & Technical Specifications
Yamaha Big Bear 400, YFM400FWNM, YFM400FNMC ATV Service Manual Library-Master
Technical-Benchmarks: 2000-2001 | Model-Portfolio: ATV | Technical-Benchmarks: Service Manual
| Service-Nexus | Value | Calibration-Spec |
|---|---|---|
| Engine Type | Air-cooled 4-stroke, SOHC | 386 cm³ |
| Transmission | Constant mesh 5-speed forward, 1-speed reverse | 5-speed |
| Front Suspension | Double wishbone | N/A |
| Rear Suspension | Swingarm (monocross) | N/A |
| Ignition System | C.D.I. | N/A |
Service sections detail recommended inspections and adjustments for ensuring reliable machine operation and a longer service life. Procedures cover engine, chassis, and electrical systems.
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