🏷️ Basic Information Identification Make: Husqvarna Model: WR-CR 125, WR 240, WR 250, WR 260, CR 250 Year: 1991 Codes Chassis Code Prefix: H40 Engine Code Prefix 125: 08-xx Engine Code Prefix 240 250 260: 07-xx 👋 Introduction Market Position Segment: Off-road/Enduro and Motocross motorcycles Target Audience: Owners, mechanics, and enthusiasts of 1991 Husqvarna WR and CR models. Competitive Analysis Competitors 1991: KTM, Yamaha YZ series, Honda CR series, Suzuki RM series, Kawasaki KX series. Key Features Manual Focus: Comprehensive repair and maintenance guidance for specific 1991 Husqvarna models. Oem Status: Described as 'Most Complete OEM', indicating high authenticity and detail. 📋 Manual Details Coverage Areas Primary Models Covered: Husqvarna WR-CR 125, WR 240, WR 250, WR 260, CR 250 Year Coverage: 1991 Page Count Estimated Page Count: Extensive (specific page count not provided, but typical for OEM service manuals) Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, inspection, tuning, and troubleshooting for all listed displacements (125cc, 240cc, 250cc, 260cc). Transmission: Gearbox inspection, repair, clutch service, and adjustment procedures. Chassis: Frame inspection, front suspension (forks) service and overhaul, rear suspension (shock absorber, linkage) service. Brakes: Front and rear brake system inspection, maintenance, caliper service, hydraulic system bleeding, and pad replacement. Electrical: Ignition system, lighting, wiring diagrams, battery maintenance, and troubleshooting for electrical components. Fuel System: Carburetor identification, cleaning, adjustment, jetting, fuel tank, and fuel line maintenance. Cooling System: Radiator, hoses, and coolant maintenance (where applicable for specific models). Exhaust System: Muffler and pipe maintenance. Wheels And Tires: Wheel bearing maintenance, spoke tightening, and tire pressure recommendations. Procedures Included Routine Maintenance: Oil changes, filter replacements, spark plug checks, chain lubrication and adjustment, air filter cleaning. Troubleshooting Diagnostics: Detailed guides for diagnosing common starting, running, and performance issues. Component Overhaul: Complete disassembly and reassembly instructions for major components like the engine, carburetor, and suspension. Adjustments: Carburetor tuning, clutch adjustment, brake lever adjustment, suspension setup. Torque Specifications: Essential torque values for critical fasteners throughout the motorcycle. Wiring Diagrams: Comprehensive electrical schematics for all systems. Technical Depth Depth: OEM-level technical detail covering from basic maintenance to complete engine and chassis rebuilds. 📊 Manual Specifications File Format File Type: PDF Searchability: Likely text-searchable PDF (dependent on scan quality) Print Quality Quality: Varies by original source, typically black and white with clear diagrams. Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type: 2-stroke, single cylinder, liquid-cooled (typical for these models) Bore Stroke 125: Approx. 54mm x 54.5mm (typical for 125cc) Bore Stroke 240: Approx. 67mm x 67mm (typical for 240cc) Bore Stroke 250: Approx. 68mm x 68mm (typical for 250cc) Bore Stroke 260: Approx. 70mm x 68mm (typical for 260cc) Reed Valve System: Standard (typical for performance 2-strokes) Performance Horsepower 125: Approx. 30-35 HP (estimated, specific to tuning) Horsepower 250: Approx. 38-45 HP (estimated, specific to tuning) Fuel System Carburetor Type 125: Mikuni VM34 (typical) Carburetor Type 250: Mikuni TM36 or similar (typical) Fuel Type: Unleaded gasoline mixed with 2-stroke oil (pre-mix ratio specified in manual) 🔧 Transmission Standard Type: 6-speed constant mesh manual transmission Features Clutch: Wet multi-plate clutch Final Drive: Chain drive 📐 Dimensions Exterior Wheelbase Approx: 1450mm - 1470mm (varies by model) Seat Height Approx: 940mm - 970mm (varies by model) Weights Dry Weight Approx: 100kg - 110kg (varies by model) 🛡️ Safety Features Ratings Safety Certification: Not applicable to off-road motorcycles in the same way as street vehicles. Focus is on mechanical integrity and rider control. Active Features Handling: Designed for agile off-road handling, requiring rider skill. Passive Features Protective Gear Recommendation: Manual will implicitly or explicitly require appropriate protective gear (helmet, boots, etc.) for operation. 💡 Technology Features Infotainment System: N/A (Analog instrumentation typical for this era: speedometer, tachometer, odometer). Driver Assistance Features: N/A (No electronic rider aids present). Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change: Variable, dependent on usage (e.g., every 10-15 hours of riding for gearbox oil). Spark Plug Check: Regular checks recommended (e.g., every 20-30 hours or as per manual guidance). Air Filter Cleaning: Frequent cleaning is crucial for 2-stroke performance, especially in dusty conditions. Top End Rebuild: Recommended every 40-60 hours of hard use for optimal performance (piston, rings, cylinder). Fluid Specifications Gearbox Oil: Specific 2-stroke transmission oil (e.g., SAE 75W/80 or 10W-40 motorcycle specific oil - consult manual for exact spec). Coolant: Ethylene glycol-based antifreeze mixed with distilled water (if liquid-cooled). Brake Fluid: DOT 3 or DOT 4 hydraulic brake fluid (check manual for specific type). Known Issues Common Wear Items: Clutch plates, piston rings, kick-start mechanism, suspension seals, chain and sprockets. Carburetor Tuning: Can be sensitive to altitude and temperature changes, requiring periodic adjustment. Suspension Seals: Fork and shock seals can degrade over time, leading to...