🏷️ Basic Information Identification Make: Honda Model: CR250R Model Years Covered: 1986, 1987, 1988, 1989, 1990, 1991 Codes Product Identifier: CR250R 1986-91 HONDA Service Repair Manual 👋 Introduction Market Position Target Audience: DIY Owners, Professional Technicians Vehicle Type: Motocross Competition Motorcycle Competitive Analysis Value Proposition: Save Money on Repairs with Professional-Grade Information Key Features Information Source: Same Manual Used by Professional Technicians Content Style: Detailed, Step-by-Step Instructions 📋 Manual Details Coverage Areas Primary Focus: Service, Maintenance, Repair, Diagnosis Page Count Total Pages: 309 Manual Type Type: Service Repair Manual Language Language: English Format Format: PDF DOWNLOAD 📖 Manual Coverage Systems Covered Engine Group: Engine, Fuel System, Lubrication System Chassis Group: Chassis, Suspension, Steering, Brakes Electrical Group: Electrical System, Ignition System, Lighting Specific Systems: Power Valve System (ATAC or similar), Crankcase Seals, Ignition Timing Suspension Details: Front Telescopic Forks (e.g., Showa or Kayaba) and Rear Monoshock Suspension (Pro-Link System). Procedures Included Maintenance Procedures: Periodic Maintenance, Tune-up Procedures Diagnostic Procedures: Troubleshooting, Diagnosis Repair Procedures: Step-by-step Repair Instructions Frame Procedures: Steering stem bearing service, swingarm bearing service Wheel Procedures: Wheel bearing replacement, spoke tensioning (if applicable) Bodywork Procedures: Plastics removal/installation, seat servicing. Technical Depth Depth Level: Comprehensive Professional Technician Level Diagnostic Capabilities: Systematic troubleshooting guides for electrical and mechanical faults Rebuild Procedures: Engine disassembly, component inspection, and reassembly (full rebuilds) 📊 Manual Specifications File Format File Type: PDF Text Searchability: Likely Searchable (common for professional PDF manuals) Print Quality Printability: Yes Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) Compatibility Operating Systems: Win/Mac Requirements Software Requirement: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Liquid-Cooled, 2-Stroke Single Cylinder Engine Displacement Cc: 249 Performance Bore X Stroke Mm: 66.0 x 72.0 (approximate, varies by year) Compression Ratio: 6.8:1 (approximate, varies by year) Fuel System Carburetor Type: Keihin PWK Series (e.g., PWK39) Fuel Type: Unleaded Gasoline (with specified octane rating) Lubrication System Lubrication Method: Premix (Gasoline/Oil mixture) or Oil Injection (varies by year) Engine Components Ignition System: CDI (Capacitor Discharge Ignition) Cooling System: Liquid-Cooled Clutch Actuation: Cable Operated 🔧 Transmission Standard Transmission Type: 5-Speed Manual Features Clutch Type: Wet Multi-Plate Fluid Specifications Transmission Oil Type: SAE 10W-30 API SE or SF (for transmission/clutch, often shared) 📐 Dimensions Weights Dry Weight Kg: 106 - 113 (varies by year) Wet Weight Kg: Approx. 115-122 (varies by year) Fuel Tank Capacity Liters: 9.0 - 9.5 (approximate, varies by year) 🛡️ Safety Features Active Features Braking System Front: Hydraulic Disc Braking System Rear: Hydraulic Disc Passive Features Frame Type: Steel Semi-Double Cradle 💡 Technology Features Infotainment Infotainment System: N/A (Motocross Motorcycle) Driver Assistance Driver Assistance Features: N/A (Motocross Motorcycle) Connectivity Connectivity Features: N/A (Motocross Motorcycle) 🔧 Maintenance Service Intervals Oil Change Interval Hours: As specified in manual (e.g., every 10-20 hours of hard use) Air Filter Cleaning Interval Hours: As specified in manual (frequently recommended) Spark Plug Replacement Interval: As specified in manual (e.g., every 25-50 hours or as needed) Fluid Specifications Coolant Type: Distilled Water and Motorcycle Antifreeze/Coolant Brake Fluid Type: DOT 3 or DOT 4 Hydraulic Brake Fluid Known Issues Common Wear Item: Chain and Sprockets Maintenance Focus: Regular top-end rebuilds are typical for high-performance 2-strokes Electrical Issues: Potential for stator or CDI unit failure, wiring harness wear. Maintenance Procedures Carburetor Adjustment: Detailed procedures for jetting and idle speed adjustment Suspension Servicing: Fork oil change, seal replacement, shock absorber servicing 📚 Vehicle History Brand Heritage Brand Focus: Reputation for Performance and Reliability in Motocross Model Evolution Cr Series Significance: Flagship Motocross Line for Honda Key Updates During Period: Significant updates to suspension, engine tuning, chassis geometry, and power delivery across these model years. Production Manufacturing Location: Japan