🏷️ Basic Information Identification Make: Yamaha Model: SR250 Model Variant: SR250G Production Years Covered: 1980, 1981, 1982, 1983 Codes Model Code Prefix: SR250G 👋 Introduction Market Position Target Audience: Professional technicians, DIY mechanics, Yamaha SR250 owners Competitive Analysis Value Proposition: Provides comprehensive, manufacturer-approved repair and maintenance information, saving on labor costs. Key Features Accessibility: Instant download, printable sections for workshop use. Completeness: Covers routine maintenance to complete engine overhauls, including wiring diagrams. 📋 Manual Details Coverage Areas Primary Coverage: Workshop Service, Repair, Maintenance, Troubleshooting, Overhaul Page Count Estimated Pages: Hundreds (specific count not provided, typical for comprehensive workshop manuals) Manual Type Type: Workshop Service Manual / Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Detailed engine overhaul, tuning, carburetor, ignition system, lubrication system Transmission: Clutch operation, gearbox disassembly and assembly, shifting mechanism Electrical System: Wiring diagrams, lighting system, charging system, ignition system, starter system, battery maintenance Chassis And Suspension: Front fork (telescopic), rear suspension (swingarm, shock absorbers), steering system, frame inspection Brakes: Front disc brake, rear drum brake, hydraulic system, brake pad/shoe replacement Fuel System: Fuel tank, fuel petcock, fuel lines, carburetor (likely Mikuni VM series) Exhaust System: Muffler, exhaust pipe, gasket replacement Procedures Included Maintenance: Periodic maintenance charts, oil changes, filter replacements, chain adjustment, spark plug checks Repair: Step-by-step repair instructions for all major components Troubleshooting: Diagnostic guides for common problems, symptoms, and solutions Overhaul: Complete engine and component overhaul procedures Adjustments: Carburetor tuning, valve clearance adjustment, brake adjustments Wiring Diagrams: Detailed electrical schematics included Technical Depth Depth: Comprehensive, suitable for professional technicians and advanced DIY enthusiasts 📊 Manual Specifications File Format Format: PDF Print Quality Printability: Full Printable Zoom Functionality: Zoom IN/OUT capable Binding Type Binding: Digital (PDF Download) Paper Type Paper Type: Not Applicable (Digital) Delivery Delivery Method: Instant Download Requirements Software Requirements: Adobe PDF Reader, WinRAR Operating System Compatibility: All Versions of Windows & Mac ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, Single-cylinder, Air-cooled Displacement: 249 cc (approximately) Bore X Stroke: Typically around 71.0 mm x 62.0 mm (specific values to be confirmed in manual) Compression Ratio: Typically around 9.5:1 (specific values to be confirmed in manual) Performance Horsepower: Approx. 18-20 HP (specific values to be confirmed in manual) Torque: Approx. 18-20 Nm (specific values to be confirmed in manual) Fuel System Carburetor Type: Likely Mikuni VM34SS or similar single carburetor Fuel Type: Unleaded gasoline Lubrication System Oil Type: SAE 10W-40 or 20W-40 motorcycle specific oil (refer to manual for exact specifications) Oil Capacity: Approx. 1.8 - 2.0 Liters (refer to manual for exact specifications) Ignition System Ignition Type: CDI (Capacitor Discharge Ignition) Engine Components Valvetrain: SOHC (Single Overhead Camshaft), 2 valves per cylinder Cooling Method: Air-cooled 🔧 Transmission Standard Transmission Type: 5-speed constant mesh Clutch Type: Wet, multi-plate Features Gear Ratios: Specific gear ratios detailed in the manual Fluid Requirements Transmission Oil Type: Yamalube or equivalent motorcycle transmission oil (refer to manual for exact specifications) Transmission Oil Capacity: Refer to manual for exact specification 📐 Dimensions Exterior Length: Refer to manual for exact specification Width: Refer to manual for exact specification Height: Refer to manual for exact specification Weights Dry Weight: Approx. 147 kg (refer to manual for exact specification) Wet Weight: Refer to manual for exact specification Wheels And Tires Front Tire Size: Typically 3.00-18 4PR or similar Rear Tire Size: Typically 110/90-18 M/C 61S or similar Front Wheel: Spoked wheel Rear Wheel: Spoked wheel 🛡️ Safety Features Ratings Crash Test Ratings: Not applicable to vintage motorcycles in the modern sense. Active Features Braking System: Front disc brake, Rear drum brake Passive Features Lighting: Headlight, Taillight, Turn Signals 💡 Technology Features Infotainment Infotainment System: Basic analog instrumentation (speedometer, tachometer, odometer, indicator lights). Driver Assistance Driver Assistance Features: None. Connectivity Connectivity Options: None. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 3,000 km or 6 months (refer to manual for precise interval) Spark Plug Replacement: Refer to manual for recommended interval Valve Clearance Check: Typically every 6,000 km or 12 months (refer to manual for precise interval) Fluid Specifications Brake Fluid Type: DOT 3 or DOT 4 (refer to manual for exact specification) Fork Oil Type: Specific viscosity fork oil, e.g., SAE 10W (refer to manual for exact specification) Known Issues Carburetor Performance: Can be prone to clogging if fuel is left stagnant; requires regular cleaning and adjustment. Ignition coil performance degradation over time. Electrical Connections: Corrosion in connectors can lead to intermittent electrical faults. Engine Compression: Wear in piston rings and cylinder bore can lead to reduced compression over high mileage. Exhaust Flange Leaks: Exhaust header flange gaskets can wear out, leading to exhaust leaks. 📚 Vehicle History Brand Heritage Yamaha Motorcycle Division: Yamaha Motor Company is renowned for its innovation and performance in motorcycle manufacturing, dating back to the early 1950s. Model Evolution Sr Series:...