Target Audience:
Owners, DIY mechanics, and professional technicians working on Yamaha Timberwolf YFB250G 1995 ATVs.
Value Proposition:
Provides dealership-level technical information, enabling cost savings and informed maintenance/repair decisions.
Completeness:
Claimed to be a complete service manual, covering all necessary repair instructions.
Reliability:
Endeavors to provide the most reliable information for optimal vehicle performance.
Ease Of Use:
Aimed at helping owners better understand and repair their ATVs like professionals.
Engine Repair:
Complete engine disassembly and reassembly, including internal component overhauls.
Fuel System:
Carburetor tuning, cleaning, rebuilding, fuel pump, fuel lines, and fuel tank maintenance.
Ignition System:
Spark plug, ignition coil, CDI unit, stator, and troubleshooting.
Lubrication System:
Oil pump, oil filter, oil passages, and oil change procedures.
Exhaust System:
Muffler, exhaust pipe, and heat shield inspection and maintenance.
Electrical System:
Wiring diagrams, battery, starter motor, charging system, lighting, and switches.
Transmission:
Removal, installation, and internal component servicing of the transmission.
Chassis And Suspension:
Front and rear suspension, steering system, and frame inspection.
Brakes:
Brake system servicing, including fluid replacement, caliper, and master cylinder maintenance.
Bodywork:
Body panel removal, installation, and cosmetic repairs.
Tune Ups:
Comprehensive tune-up procedures, including carburetor adjustments and ignition timing.
Maintenance:
Routine scheduled maintenance, fluid checks, and lubrication.
Removal And Installation:
Step-by-step instructions for removing and installing major components.
Assembly And Disassembly:
Detailed breakdown and reassembly procedures for all major systems.
Troubleshooting:
Diagnostic procedures for identifying and resolving common issues.
Depth Of Information:
Covers everything from routine maintenance to complete engine and transmission rebuilds, assuming general automotive practices are known.
Proprietary Components:
Includes instructions for proprietary Yamaha components and references manufacturer instructions for other components.
Engine Type:
Air-cooled, 4-stroke, SOHC, 2-valve
Displacement:
230 cc (approximate, based on model designation)
Bore X Stroke:
Specifications likely found within the manual (e.g., 68.5 mm x 64.0 mm or similar for a 230cc class engine).
Compression Ratio:
Specifications likely found within the manual.
Horsepower:
Specifications likely found within the manual (typically in the 16-20 HP range for this class).
Torque:
Specifications likely found within the manual.
Fuel Delivery:
Carburetor (likely a Mikuni VM series, e.g., VM26 or similar).
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Specifications likely found within the manual (typically around 2.5-3 gallons).
Transmission Type:
Automatic (likely Continuously Variable Transmission - CVT, or a torque converter with planetary gears).
Drive System:
2WD (Rear Wheel Drive) or 4WD (Four-Wheel Drive) - YFB250G typically refers to a 2WD model.
Gear Selection:
Forward, Neutral, Reverse (F-N-R) selection often controlled by a lever.
Length:
Specifications likely found within the manual (approx. 73-78 inches).
Width:
Specifications likely found within the manual (approx. 40-44 inches).
Height:
Specifications likely found within the manual (approx. 42-45 inches).
Dry Weight:
Specifications likely found within the manual (approx. 400-450 lbs).
Ground Clearance:
Specifications likely found within the manual (typically 6-8 inches).
Atv Safety Standards:
Designed to meet industry safety standards for ATVs of its era.
Braking System:
Hydraulic disc brakes (likely front and rear) for reliable stopping power.
Lighting:
Headlights and taillights for visibility in various conditions.
Warning Lights:
Instrument panel indicators for warnings and system status.
Oil Change Interval:
Refer to manual for specific intervals, typically every 50-100 operating hours or annually.
Air Filter Cleaning:
Regular cleaning and inspection recommended, especially in dusty conditions.
Spark Plug Replacement:
Specifications for replacement intervals and plug type will be in the manual.
Engine Oil Type:
Likely a SAE 10W-30 or 20W-40 motorcycle-specific oil meeting API SG or higher standards. Consult manual for exact specification and capacity.
Transmission Fluid Type:
Specifications likely found within the manual, often shared with engine oil or a specific gear oil.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Carburetor Performance:
Carburetors can become clogged over time, requiring cleaning and adjustment. Common for older ATVs.
Electrical Connections:
Corrosion or loose connections in wiring harnesses can lead to intermittent electrical issues.
Suspension Wear:
Bushings and ball joints in the suspension may wear over time, affecting handling and ride quality.
Torque Wrench Usage:
Essential for ensuring fasteners are tightened to specified torque values to prevent damage or failure.
Special Tools:
Manual may identify specific Yamaha special tool numbers for certain adjustments or repairs.
Yamaha Atv Legacy:
Yamaha has a long-standing history of producing reliable and capable ATVs, often pioneers in the industry.
Timberwolf Lineage:
The Timberwolf series was a popular line of utility-focused ATVs, known for their balance of performance and durability.
Production Years:
The Yamaha Timberwolf YFB250G was produced in the mid-1990s, with this manual specifically covering the 1995 model year.
