Target Audience:
Owners and independent repair shops seeking detailed information to maintain, diagnose, and repair the Yamaha YFB 250 Timberwolf.
Value Proposition:
Provides a cost-effective alternative to dealership service, empowering users with factory-level repair data.
Benefit 1:
Enables users to perform complex repairs, saving on labor costs.
Benefit 2:
Facilitates proactive maintenance, extending the lifespan and reliability of the ATV.
Benefit 3:
Improves understanding of vehicle systems for better problem prevention.
Primary Coverage:
Service and Repair
Secondary Coverage:
Maintenance, Troubleshooting, Technical Specifications
Estimated Pages:
Varies based on specific edition; typical comprehensive manuals for this era are 200-400 pages.
Type:
Digital Service Repair Manual
Software Requirements:
Adobe PDF Reader or compatible PDF viewer; standard file extraction utility for .zip archives.
Engine:
Complete overhaul, lubrication, cooling system, fuel system (carburetion), ignition system, starting system, exhaust system.
Chassis:
Frame, suspension (front and rear), steering system, wheel bearings, brakes (hydraulic front, drum rear), tires and wheels.
Drivetrain:
Clutch operation and adjustment, gearbox/transmission overhaul, drive shafts, final drive (chain or shaft drive details depend on specific model variant).
Electrical:
Wiring diagrams, battery, charging system (stator, regulator/rectifier), lighting, ignition control, instrument panel.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustments, spark plug service, brake adjustments, general cleaning and lubrication.
Repair:
Engine rebuild procedures, transmission disassembly and assembly, suspension component replacement, brake caliper/drum servicing, electrical component diagnostics and replacement.
Troubleshooting:
Step-by-step diagnostic guides for common and uncommon issues, fault code interpretation (if applicable), electrical system troubleshooting, engine performance problems.
Depth:
Comprehensive, covering from basic adjustments to full engine and drivetrain rebuilds. Includes detailed torque specifications, clearances, and diagnostic procedures.
Readability:
High quality PDF, zoomable for detailed viewing of diagrams and text.
Searchability:
Searchable text content within the PDF for quick information retrieval.
Printability:
Designed for clear printing of all pages, suitable for workshop use.
Digital Binding:
N/A (Digital PDF)
Digital Paper Type:
N/A (Digital PDF)
Operating Systems:
Compatible with all versions of Windows and Mac operating systems.
Device Compatibility:
Usable on smartphones and tablets supporting PDF readers.
Engine Type:
Four-stroke, SOHC
Displacement:
230cc (approximately)
Bore X Stroke:
Specifications available in manual (e.g., 69.0 mm x 62.2 mm)
Cooling System:
Air-cooled
Horsepower:
Specifications available in manual (typically in the 15-20 HP range for this class)
Torque:
Specifications available in manual
Carburetor:
Mikuni VM Series (specific model number available in manual, e.g., VM26)
Fuel Type:
Unleaded gasoline
Ignition Type:
CDI (Capacitor Discharge Ignition)
Oil Type:
Yamalube 4W or equivalent SAE 10W-30 API SE, SF engine oil
Oil Capacity:
Specifications available in manual (e.g., 1.5 L without filter change, 1.7 L with filter change)
Transmission Type:
Constant-mesh, 5-speed forward, 1 reverse
Clutch Type:
Wet, multiple-disc
Drive System:
2WD (Rear Wheel Drive)
Final Drive:
O-ring sealed chain
Transmission Fluid:
Yamalube Gear Oil or equivalent SAE 80 API GL-4
Transmission Fluid Capacity:
Specifications available in manual (e.g., 0.55 L)
Length:
Specifications available in manual (typical for this era: ~1800-2000 mm)
Width:
Specifications available in manual (typical for this era: ~1000-1200 mm)
Height:
Specifications available in manual (typical for this era: ~1000-1200 mm)
Dry Weight:
Specifications available in manual (typical for this era: ~200-250 kg)
Ground Clearance:
Specifications available in manual (e.g., ~150-200 mm)
Front Tire Size:
Specifications available in manual (e.g., AT 22 x 7-10)
Rear Tire Size:
Specifications available in manual (e.g., AT 22 x 10-10)
Wheel Bolt Pattern:
Specifications available in manual (typically 4-stud)
Safety Standards:
Adheres to relevant ATV safety standards for its production era.
Brakes:
Front: Hydraulic disc brakes. Rear: Drum brake.
Parking Brake:
Mechanical parking brake, typically located on the rear brake system.
Lighting:
Headlights, taillight, brake light for visibility.
Hand Guards:
Often equipped as standard or aftermarket for hand protection.
Features:
Basic instrumentation: speedometer, odometer, neutral indicator, high-beam indicator, oil pressure warning light.
Features:
None specific to modern driver assistance systems; focus is on mechanical and electrical function.
Engine Oil Change:
Every 1,000 km or 6 months, whichever comes first (refer to manual for precise intervals and conditions).
Spark Plug Check:
Every 1,000 km or 6 months. Replacement interval typically around 3,000-5,000 km.
Air Filter Cleaning:
Regular inspection based on usage conditions, cleaning every 500 km, replacement as needed.
Chain Lubrication And Adjustment:
Lubricate every 500 km, adjust chain slack to specifications (typically 10-20mm) as needed, check more frequently during wet or dusty conditions.
Brake Fluid Flush:
Recommended every 2 years, or as per manual recommendations.
Engine Oil Viscosity:
SAE 10W-30 API SE, SF
Transmission Oil Viscosity:
SAE 80 API GL-4
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for specific recommendation)
Carburetor Cleaning:
Clogged carburetors due to fuel varnish are common if the ATV is stored without proper fuel stabilization or draining.
Suspension Bushings:
Wear and tear on suspension bushings can lead to sloppy handling and noise.
Electrical Connections:
Corrosion or loose connections in the electrical system, especially in humid environments, can cause intermittent issues.
Manufacturer History:
Yamaha Motor Company is a long-standing Japanese manufacturer renowned for its motorcycles, ATVs, marine products, and musical instruments. Founded in 1955, Yamaha has a strong reputation for innovation and quality in the powersports industry.
Timberwolf Lineage:
The Timberwolf line was Yamaha's entry into the mid-size utility ATV market, known for its reliable performance and off-road capability. The YFB 250 was a popular model in the early 1990s.
Production Period:
The YFB 250 Timberwolf was produced throughout the 1990s, with the 1992 model being an early iteration.
