🏷️ Basic Information Identification Make: Yamaha Model: BR250F Year: 1987 Product Name: Yamaha BR250 BR250F 1987 Full Service Repair Manual PDF Download Codes Chassis Code Prefix: BR250F 👋 Introduction Market Position Segment: Dual-purpose motorcycle, often referred to as a 'Dual Sport' or 'Enduro' style bike. Competitive Analysis Competitors 1987: Honda NX250, Kawasaki KLR250, Suzuki DR250S. Key Features Intended Use: Versatile on-road and off-road capability, commuting, light trail riding, adventure touring. Target Audience: Riders seeking a reliable and capable all-around motorcycle for varied terrain and commuting needs. Value Proposition Manual Value: Provides comprehensive technical guidance to maintain, repair, and restore the Yamaha BR250F, ensuring longevity and optimal performance. 📋 Manual Details Coverage Areas Primary Coverage: Full Service Repair Page Count Estimated Page Count: 300-400 Manual Type Manual Type: Service Manual / Workshop Manual / Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, disassembly, inspection, assembly, tuning, lubrication system, cooling system (air-cooled), fuel system (carburetor), ignition system, exhaust system. Transmission: Gearbox disassembly, inspection, assembly, gear shift mechanism, clutch operation and adjustment. Drivetrain: Drive chain adjustment and maintenance, rear hub, sprockets. Suspension: Front fork disassembly, inspection, seal replacement, oil levels, rear shock absorber inspection and replacement, swingarm maintenance. Brakes: Front and rear brake system maintenance, fluid replacement, bleeding, caliper inspection, brake pad replacement, drum brake adjustment. Electrical System: Wiring diagrams, battery maintenance, charging system (stator, regulator/rectifier), lighting system (headlight, taillight, indicators), ignition system troubleshooting, starter motor, horn. Fuel System: Carburetor disassembly, cleaning, adjustment, jetting specifications, fuel tank maintenance, fuel lines. Body And Frame: Frame inspection, body panel removal and installation, seat, handlebars, controls, footpegs, fenders. Wheels And Tires: Tire pressure specifications, wheel bearing maintenance, spoke tension adjustment, rim inspection. Procedures Included Maintenance: Regular scheduled maintenance, oil changes, filter replacements, chain lubrication and adjustment, spark plug replacement, air filter cleaning/replacement, brake system checks. Troubleshooting: Diagnostic procedures for common problems, electrical system faults, engine performance issues, starting problems, transmission issues. Repair: Detailed step-by-step instructions for component disassembly, repair, reassembly, and adjustment for all major vehicle systems. Rebuild: Comprehensive guides for engine, carburetor, and suspension component rebuilds. Specifications And Data: Torque specifications, tolerances, fluid capacities, wiring diagrams, electrical component data, part numbers (where applicable). Technical Depth Depth Of Coverage: Comprehensive: Covers all aspects from basic owner maintenance to advanced mechanical and electrical repair, suitable for professional mechanics and experienced DIY enthusiasts. 📊 Manual Specifications File Format File Type: PDF Print Quality Print Readability: High-resolution, clear text and diagrams suitable for printing. Binding Type Binding Type: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Searchability Searchable Text: Likely searchable text within the PDF for quick information retrieval. ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, single-cylinder, DOHC, 4 valves Displacement: 249 cc (249.6cc is common for this engine) Bore X Stroke: 72.0 mm x 61.2 mm (typical for this engine) Compression Ratio: 9.7:1 (typical) Cooling System: Air-cooled Performance Horsepower Estimated: Approximately 24-28 hp @ 8000 rpm (varies by market and tuning) Torque Estimated: Approximately 20-23 Nm @ 6500 rpm (varies by market and tuning) Fuel System Carburetor Type: Mikuni VM34SS or similar 34mm constant velocity carburetor Fuel Type: Unleaded gasoline, octane rating 87 or higher (RON/MON specified in manual) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Lubrication System Oil Type: Yamalube 4 (or equivalent API SE, SF, SG 10W-40 or 20W-50 motorcycle oil) Oil Capacity: Approx. 1.7 - 1.9 Liters (with filter change) Starting System Starter Type: Electric Start 🔧 Transmission Standard Transmission Type: 6-speed constant mesh Clutch Type: Wet, multi-plate Features Gear Ratios: Specific gear ratios provided in the manual (e.g., 1st: 2.833, 2nd: 1.933, 3rd: 1.478, 4th: 1.200, 5th: 1.045, 6th: 0.917) Final Drive: O-ring sealed chain Transmission Oil Type: Yamalube 4 (or equivalent API SE, SF, SG 10W-40 or 20W-50 motorcycle oil) Transmission Oil Capacity: Approx. 0.9 Liters 📐 Dimensions Exterior Length: Approx. 2170 mm Width: Approx. 830 mm Height: Approx. 1175 mm Wheelbase: Approx. 1425 mm Ground Clearance: Approx. 225 mm Weights Dry Weight: Approx. 135 kg Wet Weight: Approx. 147 kg Gross Vehicle Weight Rating: Not explicitly stated, but rider + passenger + cargo capacity implied. Cargo Fuel Tank Capacity: Approx. 11 Liters (including reserve) 🛡️ Safety Features Ratings Safety Certifications: N/A (Motorcycle safety certifications vary by region and are generally not categorized like automotive safety ratings). Active Features Braking System: Front: Disc brake; Rear: Drum brake. Lighting: Halogen headlight, taillight, brake light, turn signals. Passive Features Frame Construction: Steel semi-double cradle frame for stability and durability. Ergonomics: Upright riding position for rider comfort and control. 💡 Technology Features Infotainment Infotainment Features: N/A (Focus is on mechanical and electrical function, no infotainment systems). Driver Assistance Driver Assistance Features: N/A (No electronic driver assistance systems present). Connectivity Connectivity Features: N/A (No connectivity features). Instrumentation Instrument Panel: Analog speedometer, tachometer, odometer,...