Target Audience:
Yamaha Timberwolf YFB250 owners, independent repair shops, and ATV enthusiasts seeking in-depth repair knowledge.
Value Proposition:
Provides professional-level repair and maintenance data, enabling significant cost savings on dealership service.
Content Richness:
Covers all diagnostic and repair procedures from A-Z with high-quality visuals.
Accessibility:
Instant download format, printable for convenient workshop use, no advanced computer skills required.
Applicable Years:
1992, 1993, 1994, 1995, 1996, 1997, 1998
Vehicle Type:
All-Terrain Vehicle (ATV)
Estimated Page Count:
N/A (Digital PDF, content density varies)
Manual Classification:
Workshop Repair Manual / Service Manual
Primary Language:
English
Delivery Format:
PDF Download
Engine Management:
Carburetor tuning, ignition system diagnostics, troubleshooting, valve clearance adjustment, compression testing.
Fuel System:
Fuel tank removal/installation, fuel pump operation, carburetor overhaul (jets, floats, needle valves), fuel line maintenance.
Drivetrain:
Clutch operation and adjustment, transmission gear inspection, differential service, driveshaft and U-joint checks.
Suspension Steering:
Front and rear suspension component inspection, shock absorber replacement, steering column disassembly, tie rod end adjustment, wheel bearing service.
Braking System:
Brake pad replacement, brake caliper service, master cylinder inspection, brake fluid flush and bleeding procedures, parking brake adjustment.
Electrical System:
Battery testing and maintenance, starter motor operation, charging system (stator, regulator/rectifier), lighting system troubleshooting, wiring diagrams, fuse identification.
Cooling System:
Radiator inspection, fan operation, coolant types and capacities, thermostat replacement.
Chassis Frame:
Frame inspection for cracks or damage, skid plate removal/installation, fender and body panel repair.
Routine Maintenance:
Oil changes, filter replacements, spark plug service, air filter cleaning/replacement, chain lubrication and adjustment.
Troubleshooting:
Detailed diagnostic flowcharts for common performance issues, starting problems, electrical faults.
Repair Rebuild:
Engine overhaul, transmission rebuilding, carburetor rebuilding, suspension component replacement, brake system overhauls.
Diagnostic Procedures:
Compression testing, spark plug analysis, electrical resistance checks, carburetor synchronization.
Specifications Data:
Torque values, clearances, fluid capacities, electrical specifications, diagnostic parameters.
Diagnostic Capability:
Advanced troubleshooting and diagnostic procedures for identifying root causes of malfunctions.
Rebuild Level:
Comprehensive engine, transmission, and component rebuilding instructions suitable for professional technicians and advanced DIYers.
Special Tools:
Identification and usage instructions for specialized tools required for specific repair procedures.
Document Format:
Portable Document Format (PDF)
Image Resolution:
High resolution, suitable for printing clear diagrams and photos.
Binding Method:
N/A (Digital Download, print-on-demand)
Paper Recommendation:
N/A (Digital Download, user dependent)
Operating Systems:
Microsoft Windows (95, 98, 98SE, 2000, NT, ME, XP, Vista, Windows 7), Mac OS X
Engine Type:
Four-stroke, SOHC, Air-cooled
Displacement:
230 cc (Cubic Centimeters)
Bore X Stroke:
68.5 mm x 64.0 mm (approximate, confirmation via manual required)
Compression Ratio:
9.2:1 (typical for this era)
Horsepower:
Approx. 15-18 HP (dependent on model year and tuning)
Torque:
Approx. 13-15 lb-ft (dependent on model year and tuning)
Carburetor Type:
Mikuni VM Series (e.g., VM26 or similar)
Fuel Type Recommendation:
Unleaded gasoline (Octane rating as specified in manual)
Overall Length:
Approx. 73.4 inches (1865 mm)
Overall Width:
Approx. 41.7 inches (1059 mm)
Overall Height:
Approx. 40.9 inches (1039 mm)
Dry Weight:
Approx. 460 lbs (209 kg)
Curb Weight:
Approx. 478 lbs (217 kg) (with all fluids)
Front Tire Size:
AT22 x 7-10 (or similar, specified in manual)
Rear Tire Size:
AT22 x 10-10 (or similar, specified in manual)
Wheel Bolt Pattern:
N/A (Hub-mounted wheels, specific bolt count and diameter provided in manual)
Atv Safety Standards:
Adheres to ANSI standards for ATVs (specific certifications may vary by region and year).
Braking System Type:
Hydraulic disc brakes front and rear.
Lighting:
Headlights, taillight, brake light.
Handlebars:
Handlebar grips and control layout designed for rider ergonomics.
Engine Oil Change:
Recommended every 100 hours of operation or annually, whichever comes first (refer to manual for exact interval).
Spark Plug Check:
Inspect and clean every 100 hours, replace as needed (specific plug type and gap in manual).
Air Filter Service:
Clean every 20 hours of operation, especially in dusty conditions.
Engine Oil Type:
Yamalube 4 (or equivalent API SG, SAE 10W-30 or 20W-40 depending on temperature range).
Engine Oil Capacity:
Approx. 1.7 Liters (with filter change), consult manual for precise capacity.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Carburetor Fouling:
Common issue with older carburetors, requiring cleaning and possible jet replacement due to fuel deposits.
Clutch Wear:
Automatic clutch components can wear over time, leading to slipping or engagement issues.
Stator Failure:
Charging system stator can fail, leading to battery drain and starting issues.
Suspension Bushings:
Wear on suspension bushings can lead to looseness and premature tire wear.
Yamaha Atv Division:
Yamaha has a long-standing reputation for building reliable and performance-oriented off-road vehicles, including ATVs.
Timberwolf Positioning:
The Timberwolf series was positioned as a versatile, mid-size utility ATV, known for its comfortable ride and user-friendly operation.
Manufacturing Period:
Produced across various iterations from the early 1990s to early 2000s.
