🏷️ Basic Information Identification Make: Husqvarna Model: WR 240-250-260 Year: 1990 👋 Introduction Market Position Segment: Off-road competition/Enduro motorcycles Target Audience: Owners, mechanics, and enthusiasts of 1990 Husqvarna WR series motorcycles. Competitive Analysis Competitors 1990: KTM (e.g., 250 EXC), Yamaha (e.g., YZ250WR), Honda (e.g., CR250R), Suzuki (e.g., RM250). Key Features Model Focus: Performance-oriented off-road capability for the WR (Wide Range) series. Manual Advantage: Most complete OEM information for accurate maintenance and repair, crucial for vintage off-road bikes. 📋 Manual Details Coverage Areas Manual Type: Workshop Service Repair Manual Language: English Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine disassembly, assembly, tuning, and troubleshooting for all variants. Transmission: Gearbox inspection, repair, and maintenance procedures. Suspension: Front fork (upside-down telescopic, hydraulic) and rear shock absorber service, including adjustments and rebuilds. Brakes: Front and rear brake system maintenance, including caliper service, hydraulic line bleeding, and pad replacement. Electrical: Ignition system, lighting, wiring diagrams, and component troubleshooting. Fuel System: Carburetor identification, tuning, and rebuilding procedures. Cooling System: Air-cooled engine specifications and maintenance. Frame Chassis: Frame inspection, component mounting, and general chassis maintenance. Bodywork: Plastics, seat, and fuel tank maintenance and removal. Procedures Included Maintenance: Regular service checks, lubrication points, filter replacements, and fluid changes. Repair: Step-by-step instructions for common and complex repairs across all systems. Troubleshooting: Diagnostic tables and flowcharts for identifying and resolving common issues. Diagnostics: Identification of potential failures and methods for checking component functionality. Overhaul: Detailed procedures for complete engine and gearbox rebuilds. Technical Depth Level Of Detail: Comprehensive OEM-level technical information, suitable for professional mechanics and advanced DIY enthusiasts. 📊 Manual Specifications File Format Digital Format: PDF Searchability: Likely searchable text within the PDF for easy information retrieval. Printability: Printable pages for hands-on workshop use. Print Quality Clarity: High-resolution scans ensuring legibility of text and diagrams. Binding Type Binding For Download: N/A (Digital Download) Paper Type Paper For Download: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Type: Two-stroke, single-cylinder, liquid-cooled (typically, though air-cooled variants existed for some models/years - manual confirms specific cooling for 1990 WR) Bore X Stroke 240: 66.4 mm x 72 mm (approximate, to be confirmed by manual) Bore X Stroke 250: 67.7 mm x 72 mm (approximate, to be confirmed by manual) Bore X Stroke 260: 68 mm x 72 mm (approximate, to be confirmed by manual) Displacement 240: 238 cc (approximate, to be confirmed by manual) Displacement 250: 246 cc (approximate, to be confirmed by manual) Displacement 260: 250 cc (approximate, to be confirmed by manual) Performance Horsepower: Estimated 35-45 HP (dependent on specific model and tuning, manual provides exact figures) Torque: Manual provides specific torque figures for each displacement variant. Fuel System Carburetor Type: Likely Mikuni VM or equivalent, manual will specify exact model and jetting. Fuel Type: Premium unleaded gasoline with appropriate 2-stroke oil mixture (manual specifies ratio). Reed Valve System: Standard for performance two-strokes of this era; manual details inspection and replacement. 🔧 Transmission Standard Type: 6-speed manual transmission Optional Optional Gearboxes: N/A for this model year, standard 6-speed. Features Clutch Type: Wet, multi-plate, cable-actuated clutch. Gear Ratios: Manual provides specific gear ratios for each of the 6 speeds. Transmission Oil Spec: Manual specifies type and capacity (e.g., SAE 80W or 10W-40 motorcycle gear oil). 📐 Dimensions Exterior Wheelbase: Manual will provide specific wheelbase length for accurate geometry. Weights Dry Weight: Typically around 230-250 lbs (104-113 kg), manual confirms exact figure. Fuel Capacity: Approx. 2.5 - 3.0 gallons (9.5 - 11.4 liters), manual confirms exact capacity. Gross Vehicle Weight Rating: Manual will list the GVWR for safe operation. Wheels Tires Front Wheel Size: 21 inches Rear Wheel Size: 18 inches Front Tire Size: Manual specifies recommended sizes (e.g., 80/100-21). Rear Tire Size: Manual specifies recommended sizes (e.g., 100/100-18). 🛡️ Safety Features Ratings Safety Standards: N/A (Off-road motorcycles are not subject to the same crash testing and safety rating systems as road vehicles). Active Features Braking System: Hydraulic disc brakes front and rear for effective stopping power. Passive Features Frame Construction: Robust steel frame designed for off-road durability. 💡 Technology Features Infotainment Infotainment System: N/A (Basic off-road motorcycle technology). Driver Assistance Rider Aids: N/A (No electronic rider aids typical for this era and type of motorcycle). Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Interval: Manual specifies gearbox oil change intervals based on operating hours or mileage. Air Filter Cleaning: Frequent cleaning recommended, manual details procedure and intervals. Spark Plug Replacement: Manual provides recommended spark plug types and replacement intervals. Fluid Specifications Engine Oil Type: Manual specifies the correct 2-stroke premix ratio and type of oil for the fuel. Cooling System Fluid: Manual specifies coolant type and mixture for liquid-cooled variants. Known Issues Carburetor Fouling: Common issue in two-strokes; manual details cleaning and tuning. Clutch Wear: Wear on clutch plates is common with hard use; manual details...