🏷️ Basic Information Identification Make: Husqvarna Model: 250 / 450 Year: 2004 Type: Engine Workshop Manual Codes Product Code: HWRM2004HUS250450ENG 👋 Introduction Market Position Target Audience: DIY Mechanics, Service Technicians, Enthusiasts Competitive Analysis Value Proposition: Comprehensive engine repair guidance for Husqvarna 250/450 models, empowering users to perform complex maintenance and repairs independently. Key Features Primary Benefit: Enables accurate diagnosis and repair, reducing reliance on potentially dishonest repair shops. Digital Convenience: Instant download, searchable PDF format, printable pages for workshop use. 📋 Manual Details Coverage Areas Engine Mechanical: Complete Engine Electrical: Partial (Ignition, Fuel Injection) Troubleshooting: Comprehensive Maintenance: Routine and Preventive Rebuild Procedures: Detailed Page Count Estimated Pages: 300-400 Manual Type Type: Workshop Manual / Service Manual Language Language: English Format Primary Format: PDF (Digital Download) 📖 Manual Coverage Systems Covered Engine Disassembly: Complete Engine Assembly: Complete Cooling System: Engine Component Focus Lubrication System: Engine Component Focus Fuel System Components: Injectors, Fuel Pump (Engine Related) Ignition System Components: CDI, Spark Plug, Coil Valve Train: Adjustment, Inspection, Repair Pistons And Rings: Inspection, Replacement, Specifications Crankshaft And Connecting Rod: Inspection, Bearings, Specifications Cylinder Head: Disassembly, Reassembly, Gasket Replacement Engine Block: Inspection, Boring, Honing Procedures Included Routine Maintenance: Oil Change, Filter Replacement, Spark Plug Replacement Component Removal: Engine, Cylinder Head, Piston, Crankshaft Component Installation: Engine, Cylinder Head, Piston, Crankshaft Torque Specifications: All Critical Engine Fasteners Timing Procedures: Camshaft Timing, Valve Timing Troubleshooting Guides: Diagnostic Flowcharts for Common Issues Rebuild Sequences: Step-by-step rebuild instructions Technical Depth Depth: In-depth Mechanical Repair and Overhaul Diagnostics: Detailed symptom analysis and corrective actions Specifications: Precision measurements for all wear parts 📊 Manual Specifications File Format Type: PDF Searchable: Yes (Text-based PDF) Printable: Yes (Printable by User) Print Quality Quality: High-resolution scans of original document Binding Type Binding: N/A (Digital Download) Paper Type Paper: N/A (Digital Download) ⚙️ Engine Specifications Primary Engine Engine Type 250: 4-Stroke Single Cylinder (Likely) Engine Type 450: 4-Stroke Single Cylinder (Likely) Displacement 250: Approx. 250cc Displacement 450: Approx. 450cc Cooling System: Liquid-Cooled Performance Horsepower 250: Varies by specific model, typically 30-40 HP Horsepower 450: Varies by specific model, typically 40-50 HP Fuel System Fuel Delivery: Fuel Injection (EFI) Ignition System: Digital CDI 🔧 Transmission Standard Transmission Type: 6-Speed Manual Optional Optional Transmission: N/A (Standard for this model type) Features Clutch Type: Wet Multi-Plate 📐 Dimensions Exterior Vehicle Type: Off-Road Motorcycle (Motocross/Enduro) Weights Dry Weight 250: Approx. 105-110 kg Dry Weight 450: Approx. 110-115 kg 🛡️ Safety Features Ratings Safety Ratings: N/A (Off-road vehicle, not subject to typical road vehicle safety ratings) Active Features Active Safety: Disc Brakes (Front & Rear) Passive Features Passive Safety: Robust Chassis and Frame Construction 💡 Technology Features Infotainment Infotainment Features: N/A (Off-road motorcycle, basic instrumentation) 🔧 Maintenance Service Intervals Oil Change Interval: Every 15-20 hours of riding / Annually Air Filter Cleaning: Every 5-10 hours of riding / As needed Spark Plug Replacement: Every 20-30 hours of riding Valve Clearance Check: Every 30-50 hours of riding Fluid Specifications Engine Oil Type: Full Synthetic 4-Stroke Motorcycle Oil SAE 10W-40 (e.g., Motul 7100 10W-40) Engine Oil Capacity: Approx. 0.75 - 0.9 Liters (Check manual for exact quantity) Coolant Type: Ethylene Glycol Based Antifreeze (50/50 mix with distilled water) Known Issues Common Wear Items: Piston Rings, Valve Seals, Clutch Plates, Wheel Bearings Potential Problems: Valve train wear, Clutch fade, Electrical component reliability (depending on specific model variants). 📚 Vehicle History Brand Heritage Heritage: Husqvarna Motorcycles has a long history, founded in Sweden in 1689, with motorcycle production beginning in 1903. Known for off-road prowess. Model Evolution Evolution: The 2004 models represent a development phase in Husqvarna's off-road lineup, likely incorporating advancements from previous generations in engine technology and chassis design. Production Manufacturing Location: Likely Sweden or Italy (depending on ownership at the time) 🏆 Awards & Recognition Recognitions Motorcycle Awards: Husqvarna models historically perform well in motocross and enduro racing, indicating strong inherent performance and reliability for their intended use.