🏷️ Basic Information Identification Make: Yamaha Model: SR250 / SR250G Model Years Covered: 1980, 1981, 1982, 1983, 1984 Product Type: Repair Service Manual / Workshop Manual 👋 Introduction Market Position Target Audience: Mechanical technicians and knowledgeable Yamaha SR250/SR250G owners Competitive Analysis Value Proposition: Enables owners to perform maintenance and repairs, saving costs and building expertise. Key Features Information Reliability: Stated as the most reliable information available. Purpose: To help owners get the best value and maintain their Yamaha SR250/SR250G. Dealer Equivalence: Contains many specifications and procedures found in authorized dealer service departments. Safety Emphasis: Highlights safety equipment and precautions, including torque wrench usage. Clarity Aids: Uses WARNING, CAUTION, and NOTE notations for emphasis. 📋 Manual Details Coverage Areas Primary Focus: Repair and Overhaul of Yamaha SR250 / SR250G models Page Count Number Of Pages: 123 Manual Type Type: Workshop Service Manual Language Language: English Format Delivery Format: PDF Download Printability: Yes 📖 Manual Coverage Systems Covered Engine: Detailed repair and overhaul procedures, tune-ups Fuel System: Included Ignition System: Included Lubrication System: Included Exhaust System: Included Electrical System: Included Bodywork: Included Transmission: Extensive disassembly and repair information Procedures Included Routine Maintenance: Yes Servicing: Yes Diagnostic Procedures: Yes Repair Procedures: Yes Removal Installation: Yes Assembly Disassembly: Yes Technical Depth Depth: Comprehensive, suitable for professional technicians and knowledgeable owners Special Instructions: Emphasis on product-specific aspects, includes proprietary component instructions Troubleshooting: Detailed procedures for addressing issues Special Tools: References to required or recommended special tools with potential identification numbers 📊 Manual Specifications File Format Format: PDF Print Quality Quality Description: Printable, intended for clarity and usability on paper Binding Type Binding: N/A (Digital PDF) Paper Type Paper Type: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, 4-stroke, SOHC, single-cylinder (based on common SR250 configurations) Performance Displacement: 249 cc (15.2 cu. in.) (Common for SR250 models) Bore X Stroke: 71.0 mm x 62.0 mm (2.80 in x 2.44 in) (Common for SR250 models) Compression Ratio: 9.5:1 (Typical for SR250 models) Fuel System Carburetor: Typically a Mikuni VM series, e.g., VM28 (Specifics within manual) Fuel Delivery: Carbureted 🔧 Transmission Standard Type: Constant mesh, 5-speed (Likely, based on model history) Optional Options: N/A Features Clutch: Wet, multiple disc 📐 Dimensions Exterior Overall Length: Refer to manual for precise dimensions Overall Width: Refer to manual for precise dimensions Overall Height: Refer to manual for precise dimensions Weights Dry Weight: Approx. 132 kg (291 lbs) (Typical for SR250 models) Wet Weight: Refer to manual for precise weight 🛡️ Safety Features Ratings Crash Test Data: N/A (Motorcycle) Active Features Braking System: Front disc brake, Rear drum brake (Common configuration) Passive Features Lighting: Headlight, taillight, turn signals (Coverage within manual) 💡 Technology Features Infotainment Features: N/A (Vintage Motorcycle) Driver Assistance Features: N/A (Vintage Motorcycle) Connectivity Features: N/A (Vintage Motorcycle) 🔧 Maintenance Service Intervals Oil Change: Refer to manual for specific mileage/time intervals Valve Adjustment: Refer to manual for specific mileage/time intervals Fluid Specifications Engine Oil Type: Refer to manual for specific API classification and viscosity (e.g., SAE 10W-40) Engine Oil Capacity: Refer to manual for specific capacity Brake Fluid Type: Refer to manual for specific DOT classification Known Issues Common Wear Items: Clutch plates, fork seals, carburetor jets, electrical connectors (General knowledge, manual provides specifics) Common Issues Tuneup Considerations: Carburetor synchronization, spark plug condition, air filter cleanliness are critical for optimal performance. 📚 Vehicle History Brand Heritage Manufacturer: Yamaha Motor Company Model Evolution Model Lineage: Part of Yamaha's heritage of reliable and stylish motorcycles, known for its simple and robust design. Production Production Period Covered: 1980-1984 🏆 Awards & Recognition Recognitions Awards And Certifications: N/A (Specific awards not typically listed for service manuals, but the model itself is a respected classic).