🏷️ Basic Information Identification Make: Yamaha Model: SR250 Model Variant: SR250 Exciter Special (SR250G) Generation Generation Name: SR250 Generation 1 Codes Production Codes: SR250G 👋 Introduction Market Position Target Audience: Do-it-yourself enthusiasts and experienced mechanics seeking detailed repair and maintenance information for their Yamaha SR250. Competitive Analysis Value Proposition: Provides an inexpensive and convenient way to maintain and repair the Yamaha SR250, offering factory-level detail without the cost of physical delivery. Key Features Illustrative Detail: Hundreds of photos and illustrations, detailed substeps, enlarged insets, and bold figure numbers enhance clarity and ease of use. Navigational Aid: Numbered table of contents for fast information retrieval. 📋 Manual Details Coverage Areas Covered Years: 1980, 1981, 1982, 1983 Covered Styles: All styles Page Count Page Count Estimated: Hundreds Manual Type Manual Type: Factory Service Workshop Repair Manual Language Language: English Format Digital Format: PDF 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, inspection, repair, and reassembly, including carburetor tuning, valve adjustments, and ignition system service. Transmission: Clutch operation, gearbox disassembly and assembly, gear selection mechanism, and lubrication. Electrical System: Detailed troubleshooting, wiring diagrams, component testing, charging system, ignition system, lighting, and instrumentation. Fuel System: Carburetor specifications, cleaning, adjustment, fuel tank, fuel lines, and fuel pump (if applicable). Suspension: Front fork service, rear shock absorber inspection and replacement, swingarm maintenance. Brakes: Front and rear brake system inspection, fluid replacement, caliper service, brake lever and pedal adjustment. Frame And Bodywork: Frame inspection, seat removal, body panel mounting, and accessory installation. Procedures Included Maintenance: Regular scheduled maintenance, oil changes, filter replacements, chain lubrication, and tire pressure checks. Troubleshooting: Diagnostic procedures for common starting problems, engine performance issues, electrical faults, and more. Repair: Step-by-step repair instructions for all major vehicle components, from minor adjustments to complete overhauls. Disassembly Reassembly: Complete disassembly and reassembly guidance for all major mechanical and electrical systems. Technical Depth Depth: Comprehensive, covering everything from basic rider maintenance to in-depth engine and electrical diagnostics and repair. 📊 Manual Specifications File Format Compatibility: Compatible with all PC-based Windows operating systems and Mac. Print Quality Printability: All pages are printable, allowing for individual section printing or a full manual printout. Binding Type Binding Type Digital: N/A (Digital PDF) Paper Type Paper Type Digital: N/A (Digital PDF) Storage Storage Options: Can be saved to hard drive or burned to CD-ROM. ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, Single Cylinder, SOHC (Single Overhead Camshaft) Displacement: 249 cc (15.2 cubic inches) Bore X Stroke: Approx. 71.0 mm x 63.0 mm Compression Ratio: Approx. 9.1:1 Performance Horsepower Estimated: Approx. 18-20 hp @ 7000-7500 rpm (depending on market and specific tune) Torque Estimated: Approx. 19-21 Nm @ 5500-6000 rpm (depending on market and specific tune) Fuel System Carburetor: Single Mikuni VM34SS (or similar 34mm constant velocity carburetor) Fuel Type: Unleaded gasoline (RON 91 or higher recommended) Ignition Ignition System: CDI (Capacitor Discharge Ignition) 🔧 Transmission Standard Transmission Type: 5-speed constant mesh Clutch: Wet, multiple disc Features Drive Type: Chain drive 📐 Dimensions Exterior Length Estimated: Approx. 2050 mm Width Estimated: Approx. 820 mm Height Estimated: Approx. 1100 mm Weights Dry Weight Estimated: Approx. 135-140 kg Fuel Capacity Estimated: Approx. 13 liters 🛡️ Safety Features Ratings Safety Standard: N/A (Motorcycle safety standards for the era) Active Features Braking System: Front: Disc brake, Rear: Drum brake. Passive Features Lighting: Halogen headlight, taillight, turn signals, and brake light. 💡 Technology Features Infotainment Infotainment System: N/A (Basic motorcycle technology of the era) Driver Assistance Driver Assistance: N/A (Basic motorcycle technology of the era) Connectivity Connectivity: N/A (Basic motorcycle technology of the era) 🔧 Maintenance Service Intervals Oil Change Interval: Every 3,000-5,000 km or annually (refer to manual for exact specification). Valve Clearance Check: Every 6,000-10,000 km (refer to manual for exact specification). Fluid Specifications Engine Oil Type: API SE or SF, SAE 20W-40 or 10W-40 (verify with manual). Engine Oil Capacity: Approx. 1.5 - 1.7 liters (with filter change) (verify with manual). Brake Fluid Type: DOT 3 or DOT 4 (verify with manual). Known Issues Carburetor Gumming: Carburetors can become gummed up if the bike sits for extended periods, requiring cleaning and synchronization. Electrical Connections: Corroded or loose electrical connections can lead to intermittent issues, especially in older wiring harnesses. Fork Seals: Worn fork seals can lead to oil leaks, requiring replacement of seals and potentially fork oil. 📚 Vehicle History Brand Heritage Brand History: Yamaha Motor Company, established in 1955, has a long history of producing innovative and reliable motorcycles, known for their engineering prowess and performance. Model Evolution Sr Series Heritage: The SR series is known for its classic, minimalist styling and focus on rider engagement, often serving as a platform for customization. Production Production Period: The Yamaha SR250 was produced in various forms from the late 1970s through the early 2000s, with this manual specifically covering the early generation. Manufacturing...