This manual covers the Yamaha YFB 250 Timberwolf, a versatile utility ATV produced from 1992 to 2000. Renowned for its robust design and straightforward mechanics, the Timberwolf was engineered for off-road recreational use, offering reliable performance in various conditions. Its air-cooled, 4-stroke engine, coupled with a 5-speed manual transmission featuring an automatic clutch, provides a capable platform for work and recreation. Key features include independent front suspension, a monoshock rear suspension, and hydraulic disc brakes for effective stopping power, making it a dependable choice for its intended purpose.
This comprehensive Factory Service Repair Manual provides detailed, dealer-level information for the Yamaha YFB 250 Timberwolf. It covers essential mechanical, electrical, and chassis systems, including engine overhaul, fuel system maintenance, drivetrain components, suspension, and the complete electrical system. The manual offers step-by-step repair procedures, diagnostic troubleshooting guides, and technical specifications, all presented with detailed illustrations. This resource is designed to assist Yamaha ATV owners, independent repair shops, and technicians in performing routine maintenance, complex repairs, and general servicing to keep the vehicle in optimal condition.
Model:
YFB 250 Timberwolf
Model Years Covered:
1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Product Type:
Factory Service Repair Manual
Availability:
Instant Download
Target User:
Yamaha ATV owners, independent repair shops, and DIY enthusiasts.
Advantage:
Provides the same technical information as used by official Yamaha dealerships, offering significant cost savings for repairs.
Content Focus:
Detailed illustrations, diagnostic flowcharts, and torque specifications for accurate servicing.
Usability:
Printable pages allow for convenient use in a workshop environment.
Primary Coverage:
Mechanical, Electrical, and Chassis Systems
Documentation Style:
Dealer-level, detailed illustrations and step-by-step instructions
Estimated Page Count:
Comprehensive (specific number not provided, but implies full factory manual)
Type:
Service Repair Manual
Printability:
Yes, all pages printable
Operating Systems:
Windows/Mac
Software Required:
Adobe PDF Reader
Engine Mechanical:
Engine overhaul, teardown, assembly, and internal component specifications.
Fuel System:
Carburation (cleaning, adjustment, jetting, fuel delivery system).
Drivetrain:
Drivetrain components, including gearbox, differential, drive shafts, and clutches.
Chassis:
Frame, suspension (front and rear), steering system, and wheel alignment.
Electrical System:
Wiring diagrams, ignition system, lighting, charging system, starter, and troubleshooting electrical faults.
Maintenance:
Scheduled maintenance, periodic inspections, lubrication, and adjustments.
Diagnostics:
Comprehensive troubleshooting guides for common and uncommon issues across all systems.
Repair:
Detailed step-by-step repair procedures for disassembly, component replacement, and reassembly.
Overhaul:
Engine and transmission overhaul procedures.
Depth:
Factory-level, covering basic to advanced repair and diagnostic procedures.
File Type:
Digital Download (PDF)
Print Quality:
High resolution, suitable for printing individual pages or sections.
Binding Type:
Not Applicable (Digital)
Paper Type:
Not Applicable (Digital)
Engine Type:
Air-cooled, 4-stroke, SOHC
Displacement:
230 cc (approximate, specific model variant may vary slightly)
Bore X Stroke:
Typically 67.0 mm x 66.0 mm (refer to manual for exact figures)
Compression Ratio:
Typically 9.2:1 (refer to manual for exact figures)
Horsepower:
Approx. 17-18 HP at 6,500 RPM (estimated, may vary by year/tuning)
Torque:
Approx. 14-15 lb-ft at 5,000 RPM (estimated, may vary by year/tuning)
Carburetor Type:
Mikuni VM series (e.g., VM26SS or similar) with accelerator pump
Fuel Type:
Unleaded gasoline, 87 octane minimum
Ignition Type:
CDI (Capacitor Discharge Ignition)
Cooling Method:
Air-cooled
Oil Type:
Yamaha Performance Oil 10W-40 or equivalent API SG, SAE 10W-40 classification (refer to manual for specific recommendations)
Oil Capacity:
Approx. 1.8 L (1.9 US qt) for oil change (refer to manual for exact capacity and filter change)
Transmission Type:
5-speed manual with Automatic Clutch (Centrifugal Clutch)
Clutch Type:
Wet, multi-plate, automatic operation
Gear Oil Type:
Yamalube Gear Oil 80W or equivalent API GL-4 (refer to manual for specific viscosity and classification)
Gear Oil Capacity:
Approx. 0.6 L (0.63 US qt) (refer to manual for exact capacity)
Overall Length:
Approx. 1810 mm (71.3 in) (refer to manual for exact figures)
Overall Width:
Approx. 1015 mm (40.0 in) (refer to manual for exact figures)
Overall Height:
Approx. 1040 mm (40.9 in) (refer to manual for exact figures)
Dry Weight:
Approx. 201 kg (443 lbs) (refer to manual for exact figures)
Fuel Tank Capacity:
Approx. 11 L (2.9 US gal) (refer to manual for exact figures)
Front Suspension Type:
Independent, double wishbone with adjustable spring preload
Rear Suspension Type:
Swingarm, Monoshock with adjustable spring preload
Front Tire Size:
AT22x7-10 (typical, refer to manual for specific variations)
Rear Tire Size:
AT22x10-10 (typical, refer to manual for specific variations)
Wheel Bolt Pattern:
4-stud (refer to manual for exact offset and PCD)
Safety Standard:
Designed for off-road recreational use, adheres to industry safety standards of the era.
Braking System:
Hydraulic disc brakes front and rear.
Lighting:
Dual halogen headlights, taillight, and brake light for visibility.
Features:
N/A (Focus on utility and mechanical function, not infotainment features).
Features:
N/A (Focus on utility and mechanical function, not driver assistance systems).
Oil Change Interval:
Every 1,000 km (600 miles) or 6 months (refer to manual for specific conditions)
Spark Plug Replacement:
Refer to manual, typically at 4,000 km (2,500 miles) or as needed.
Air Filter Cleaning:
Recommended every 6 months or as needed based on operating conditions (refer to manual).
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific type and brand recommendation).
Common Wear Items:
Carburetor tuning, chain and sprocket wear, brake pad replacement, battery maintenance.
Carburetor Care:
Frequent cleaning and adjustment of the carburetor, especially the idle circuit and accelerator pump, is often recommended due to fuel varnish.
Manufacturer:
Yamaha Motor Company, renowned for performance and reliability in powersports.
Timberwolf Lineage:
The YFB 250 Timberwolf was Yamaha's entry into the mid-size utility ATV market, known for its robust design and versatility.
Production Period:
1992-2000, representing a significant period of ATV development.
Model Standing:
The Timberwolf is generally regarded as a reliable and capable utility ATV for its era, appreciated for its straightforward mechanics.
