🏷️ Basic Information Identification Make: Husqvarna Model: WRK 125 Year: 1987 Generation Generation Designation: First Generation (MK I) 👋 Introduction Market Position Category: Off-road, Motocross/Enduro (Lightweight Class) Competitive Analysis Competitors: Competed against models like KTM 125 EXC, Yamaha YZ125, Suzuki RM125, Honda CR125R of the era. Key Features Engine Type: Torquey 125cc 2-stroke, liquid-cooled (check specific model variant, some may be air-cooled, but WRK usually implies water-cooled) Suspension: Long-travel suspension for off-road capability, typically featuring adjustable front forks and a monoshock rear. Handling: Known for agile handling and maneuverability in technical terrain. Performance: Emphasis on tractable power delivery suitable for trail riding and entry-level motocross. 📋 Manual Details Coverage Areas Engine: Complete engine overhaul, internal components, cooling system, lubrication system Transmission: Gearbox operation, clutch assembly, shift mechanism, lubrication Chassis: Frame, suspension (front forks, rear shock absorber), steering, wheels, hubs Brakes: Front and rear brake system servicing, hydraulic components, pad/shoe replacement Electrical: Ignition system, lighting, charging system, wiring diagrams, battery maintenance Fuel System: Carburetor tuning and overhaul, fuel tank, fuel lines, fuel pump (if applicable) Exhaust System: Exhaust pipe and silencer maintenance Bodywork: Body panels, seat, fenders, graphics Maintenance: Scheduled maintenance, fluid changes, lubrication points Troubleshooting: Diagnostic procedures for common issues Page Count Estimated Pages: ~200-300 Manual Type Type: Workshop Service Repair Manual (OEM Equivalent) Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine System: Detailed breakdown of the 125cc 2-stroke engine, including cylinder, piston, crankshaft, connecting rod, seals, and gaskets. Specific torque values for critical fasteners. Cooling System: Air cooling system analysis, fin cleaning, and general condition checks. Lubrication System: 2-stroke oil/fuel mixture recommendations, gearbox oil specifications and change intervals. Transmission System: 6-speed gearbox service, clutch operation and adjustment, shift lever linkage. Fuel Delivery System: Dell'Orto PHBH carburetor specifications, jetting, float level adjustment, and cleaning procedures. Fuel filter inspection. Ignition System: CDI ignition timing, spark plug specifications (type, gap), and coil testing. Suspension System: Front telescopic forks (oil type, level, seal replacement), rear monoshock (pre-load adjustment, damping characteristics). Braking System: Front disc brake caliper and master cylinder service, rear drum brake adjustment and shoe replacement. Hydraulic fluid type (DOT 3/4). Electrical System: Wiring diagrams for all electrical components, including lighting, horn, and kill switch. Battery specifications and charging system diagnosis. Procedures Included Engine Rebuild: Complete engine disassembly, cleaning, inspection, and reassembly with replacement part recommendations. Carburetor Tuning: Step-by-step guide for adjusting air-fuel mixture, idle speed, and throttle response. Suspension Servicing: Fork seal replacement, fork oil change, rear shock absorber adjustments. Brake Maintenance: Brake fluid bleeding, pad/shoe replacement, caliper/drum servicing. Electrical Diagnostics: Troubleshooting common electrical faults using wiring diagrams and multimeter testing. Wheel And Tire Service: Tire pressure recommendations, wheel bearing maintenance, spoke tensioning (if applicable). Cleaning And Lubrication: Points for regular cleaning and lubrication of moving parts. Troubleshooting Guides: Problem-solution tables for ignition, fuel, starting, and running issues. Technical Depth Depth: Comprehensive OEM-level detail for DIY repairs, professional mechanics, and in-depth understanding of the machine. 📊 Manual Specifications File Format Format: PDF (Portable Document Format) Searchable Text: Yes (typically, depending on the scan quality) Print Quality Quality: High-resolution scans for clear text and diagrams Binding Type Type: Digital Download (Not a physical product) Paper Type Type: N/A (Digital) ⚙️ Engine Specifications Primary Engine Engine Type: Two-stroke, single-cylinder Displacement: 123.5 cc (approx.) Bore X Stroke: 54 mm x 54 mm (typical for this era and displacement) Cooling System: Liquid-cooled Carburetor Model: Dell'Orto PHBH 28 AS (common fitment) Ignition: CDI (Capacitor Discharge Ignition) Compression Ratio: Typically around 7.0:1 to 8.0:1 (check manual for exact spec) Performance Horsepower: Approx. 25-30 HP (estimate, actual may vary) Torque: Not typically quoted for this class, but focused on mid-range pull. Fuel System Fuel Type: Unleaded gasoline with 2-stroke engine oil mix Oil Mix Ratio: Typically 40:1 or 50:1 (refer to manual for precise recommendation) 🔧 Transmission Standard Type: 6-speed constant mesh Clutch Type: Wet, multi-plate Gearbox Oil Capacity: Approx. 0.8 - 1.0 liters (check manual for exact spec) Gearbox Oil Type: API GL-4 SAE 75W/90 or SAE 80 (check manual for specific recommendation) 📐 Dimensions Exterior Wheelbase: Approx. 1370 mm (53.9 inches) - estimate, can vary slightly Seat Height: Approx. 890 mm (35 inches) - estimate Weights Dry Weight: Approx. 95-105 kg (209-231 lbs) - estimate Fuel Tank Capacity: Approx. 8-10 Liters (2.1-2.6 Gallons) - estimate 🛡️ Safety Features Ratings Offroad Safety: Designed for off-road use, safety depends heavily on rider skill and terrain conditions. Focus on predictable handling and braking. Active Features Braking System: Disc front, Drum rear provides adequate stopping power for the class. Proper maintenance is key. Passive Features Frame Construction: Robust steel frame designed for off-road stresses. 💡 Technology Features Infotainment System: N/A (No infotainment system on this model) Driver Assistance Features: N/A (No driver assistance features) Connectivity Features: N/A (No connectivity features) 🔧 Maintenance Service Intervals Oil...