The RD250, produced from 1976 to 1979, represents a significant era in performance motorcycling, embodying a "Race Developed" heritage. This iconic model, known for its potent 2-stroke parallel-twin engine, revolutionized its class with impressive power delivery and handling. The RD series, and the RD250 in particular, established a benchmark for performance and influenced motorcycle design, cementing its status as a cult classic appreciated for its engineering and exhilarating riding experience. This comprehensive Workshop Service Manual is designed to provide detailed information for the maintenance and repair of the RD250 models from 1976 through 1979. It covers a wide range of systems, including engine, transmission, fuel, ignition, lubrication, exhaust, electrical, and body components. The manual offers step-by-step instructions for routine maintenance, servicing, troubleshooting, and component removal/installation, along with essential technical specifications and safety precautions. It is an indispensable resource for mechanical technicians and owners alike, enabling professional-quality repairs and ensuring the optimal performance and longevity of the vehicle. 🏷️ Basic Information Identification Make: Yamaha Model: RD250 Years Covered: 1976, 1977, 1978, 1979 👋 Introduction Market Position Target Audience: Mechanical technicians familiar with BRP products and general automobile practices, and Yamaha RD250 owners Competitive Analysis Manual Advantage: Provides dealer-level service information, enabling professional quality repairs and cost savings for owners Key Features Accuracy Reliability: Stated as providing the most reliable information, endeavored for accuracy Comprehensiveness: Complete Service Manual containing all necessary instructions for any repair User Empowerment: Enables owners to be better informed and perform repairs like a professional technician 📋 Manual Details Coverage Areas Manual Type: Workshop Service Manual / Repair Manual Language: English Page Count: 231 pages Format: PDF Download Delivery: Electronic via Email 📖 Manual Coverage Systems Covered Engine: Complete repair and overhaul, including disassembly and assembly Transmission: Complete repair and overhaul, including disassembly and assembly Fuel System: Detailed procedures for repair and maintenance Ignition: Diagnostic and repair procedures Lubrication System: Maintenance and repair information Exhaust: Repair and component information Electrical System: Diagnostic and repair procedures Body: Repair and component information Procedures Included Routine Maintenance: Detailed instructions and schedules Servicing: Comprehensive service procedures Troubleshooting: Diagnostic and repair procedures for common and uncommon issues Removal Installation: Step-by-step instructions for components Assembly Disassembly: Detailed procedures for major assemblies Technical Depth Diagnostic Capabilities: Advanced diagnostic procedures for identifying issues Repair Complexity: Covers everything from simple tune-ups to complete engine rebuilds Special Tools: Identification and use of Yamaha specialized tools Proprietary Components: Includes instructions for proprietary component manufacturers Safety Precautions: Emphasis on safety equipment and procedures 📊 Manual Specifications File Format Primary Format: PDF Printability: Yes, printable Searchability: Implied by PDF format, typically text-searchable Print Quality Image Resolution: Assumed high quality for technical diagrams and text Binding Type Delivery Method: Digital (Email Download), not a physical binding Paper Type Physical Medium: N/A (digital file) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, parallel-twin (inherent to RD250 model) Performance Horsepower Range: Typically in the 25-30 hp range for this era and model Torque Specifications: Detailed torque specifications for engine components are expected to be within the manual Fuel System Carburetion: Details on carburetor settings, cleaning, and synchronization are included Fuel Type: Premixed gasoline and oil, with specific ratios likely detailed 🔧 Transmission Standard Transmission Type: 6-speed constant mesh (typical for RD250) Optional Transmission Variants: No optional transmissions typically offered for this model Features Gear Ratios: Specific gear ratios for each of the 6 speeds are expected in the manual Clutch Operation: Procedures for clutch adjustment and maintenance 📐 Dimensions Exterior Overall Length: Specific dimensions are detailed in the manual Overall Width: Specific dimensions are detailed in the manual Wheelbase: Specific dimensions are detailed in the manual Weights Dry Weight: Specific weight figures are typically provided in the manual Gvwr: Not typically applicable to this type of motorcycle, but load capacities may be listed 🛡️ Safety Features Ratings Crash Test Results: N/A for this era of motorcycle; safety focus is on operational safety and maintenance Active Features Braking System: Details on front and rear brake systems, maintenance, and adjustment Suspension: Information on front fork and rear shock absorber maintenance and adjustment Passive Features Lighting System: Maintenance and troubleshooting for headlights, taillights, and indicators Warning Symbols: Specific emphasis on WARNING, CAUTION, and NOTE symbols within the manual 💡 Technology Features Infotainment Audio System: N/A for this model; focus is on mechanical and electrical systems Driver Assistance Electronic Aids: No electronic driver assistance systems are present on this vintage motorcycle Connectivity Bluetooth Usb: N/A for this model 🔧 Maintenance Service Intervals Oil Change: Specific interval for 2-stroke oil and gearbox oil changes will be detailed Spark Plug Maintenance: Recommended replacement or cleaning intervals for spark plugs Chain Lubrication Adjustment: Routine maintenance schedule for drive chain Fluid Specifications Engine Oil: Specific 2-stroke oil mix ratio and type (e.g., JASO FD rated) Gearbox Oil: Recommended gearbox oil type and...