🏷️ Basic Information Identification Make: Yamaha Model: BR250F Model Variant: BR250 Year: 1986 Codes Product Code: BR250F-1986-SRM-PDF 👋 Introduction Market Position Category: Lightweight Motorcycle / Dual-Sport Target Audience: Enthusiasts, mechanics, owners of the Yamaha BR250F Competitive Analysis Competitors 1986: Honda NX250, Kawasaki KLR250, Suzuki DR250S Key Features Vehicle Design Philosophy: Versatile, lightweight dual-purpose motorcycle for on and off-road use Key Features Manual Value Proposition: Enables owners to perform all necessary maintenance and repairs, saving time and money 📋 Manual Details Coverage Areas Vehicle Models Covered: Yamaha BR250F (1986) Geographic Coverage: Global (typical for Yamaha service manuals) Page Count Estimated Page Count: 300+ Manual Type Manual Type: Full Service Repair Manual Purpose: Repair, maintenance, rebuilding, refurbishing, restoration Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, troubleshooting, overhaul, specifications Fuel System: Carburetor service and adjustment, fuel pump, fuel lines, fuel tank maintenance Ignition System: CDI unit, ignition timing, spark plugs, wiring diagrams Transmission: Gearbox inspection, repair, fluid changes, clutch operation Chassis: Frame inspection, fork assembly, rear suspension, wheel bearings Brakes: Brake system maintenance, caliper service, fluid replacement, adjustment Electrical System: Wiring diagrams, component testing, battery maintenance, lighting, charging system Bodywork: Panel removal and installation, fairing components, seat, handlebars Procedures Included Maintenance: Scheduled maintenance, oil changes, filter replacements, chain adjustment, lubrication Troubleshooting: Diagnostic charts, common problems and solutions Repair: Component replacement, part-specific repair procedures Rebuilding: Engine rebuilds, carburetor overhauls, suspension rebuilds Specifications: Torque values, clearances, fluid capacities, electrical tolerances Technical Depth Depth: Comprehensive (from basic inspection to full engine rebuild) Detail Level: Detailed step-by-step instructions, exploded diagrams, clear illustrations 📊 Manual Specifications File Format File Type: PDF Searchability: Text-searchable (typically) Print Quality Print Readability: High-resolution, suitable for printing Binding Type Binding Type: N/A (PDF Download) Paper Type Paper Type: N/A (PDF Download) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, SOHC, parallel-twin (Note: BR250F is likely a single cylinder, research indicates twin cylinder for some BR models, but specific F variant often single. Assuming single based on typical 250cc dual sports of era) Displacement: Approx. 249 cc (Exact specification requires specific Yamaha data for BR250F variant) Bore X Stroke: Refer to manual for precise dimensions Compression Ratio: Refer to manual for precise ratio Performance Horsepower: Estimated 20-25 HP (typical for this class) Torque: Refer to manual for precise specifications Fuel System Carburetion: Single Mikuni VM series (typical, specific model in manual) Fuel Capacity: Approx. 10-12 Liters (typical for dual-sports) Cooling System Cooling Method: Air-cooled Lubrication Oil Type: API SG, SAE 10W-40 Motorcycle Oil (Verify with manual) Oil Capacity: Approx. 1.5-2.0 Liters (Verify with manual) 🔧 Transmission Standard Transmission Type: 5-speed manual Final Drive: Chain drive Features Clutch Type: Wet, multi-plate Transmission Fluid: Yamalube 4 (or equivalent SAE 80W API GL-4 Gear Oil) (Verify with manual) 📐 Dimensions Exterior Length: Refer to manual for exact dimensions Width: Refer to manual for exact dimensions Height: Refer to manual for exact dimensions Weights Dry Weight: Approx. 120-130 kg (Estimate for class) Wet Weight: Refer to manual for exact specifications 🛡️ Safety Features Ratings Safety Certification: Not applicable (motorcycle) Active Features Braking System: Front disc brake, Rear drum brake (typical for the era and model) Suspension Front: Telescopic forks Suspension Rear: Monocross linkage suspension (or similar swingarm design) Passive Features Lighting: Headlight, taillight, turn signals 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle) Driver Assistance ABS: Not equipped Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 km or 6-12 months (Refer to manual for precise intervals) Air Filter Cleaning: Every 3,000-5,000 km Spark Plug Replacement: Every 10,000-15,000 km Valve Clearance Check: Every 10,000-20,000 km Fluid Specifications Engine Oil Spec: SAE 10W-40 API SG (Verify with manual) Brake Fluid Spec: DOT 3 or DOT 4 (Verify with manual) Fork Oil Type: Yamaha Fork Oil G-10 or equivalent SAE 10W (Verify with manual) Known Issues Carburetor Cleaning: Common issue with older carburetors requiring regular cleaning and adjustment due to fuel deposits. Electrical Connections: Corrosion or degradation of electrical connectors can lead to intermittent faults. Suspension Seals: Fork seal leaks can occur with age and mileage. 📚 Vehicle History Brand Heritage Yamaha Motorsports Legacy: Yamaha has a long and successful history in motorsports, known for innovation and performance in motorcycles. Model Evolution Br Series Context: The BR series represented Yamaha's entry into the lightweight dual-sport market, offering utility and off-road capability. Br250F Introduction: Introduced in the mid-1980s to cater to riders seeking a versatile machine for commuting and light trail riding. Production Production Period: Mid-1980s 🏆 Awards & Recognition Recognitions Model Specific Awards: No specific major awards widely documented for this particular model, but generally well-regarded for its reliability in its class.