The Husqvarna SM 125 is a performance supermoto motorcycle produced in 1998, known for its on-road capability and distinctive styling derived from off-road platforms. Featuring a liquid-cooled, 2-stroke, single-cylinder engine with a displacement of approximately 124.8 cc, this model was engineered to deliver spirited performance, often competing with models from KTM, Yamaha, and Suzuki. Its robust steel perimeter frame and upside-down front forks contribute to its agile handling, making it a popular choice among motorcycle enthusiasts seeking a versatile machine for both spirited riding and general use. This factory service repair manual provides comprehensive guidance for the Husqvarna SM 125, covering all essential aspects of service, repair, and maintenance. Within its pages, you will find detailed procedures for engine disassembly and assembly, fuel system tuning, ignition system diagnostics, transmission servicing, and chassis component maintenance, including suspension and brake systems. Additionally, the manual includes wiring diagrams, technical specifications, and troubleshooting guides to assist owners, mechanics, and technicians in effectively maintaining and repairing the vehicle. 🏷️ Basic Information Identification Make: Husqvarna Model: SM 125 Year: 1998 Codes Engine Code: WRE 125 (likely a variant of Rotax 125) Chassis Code: SM (Supermoto) 👋 Introduction Market Position Category: Performance Supermoto Motorcycle Target Audience: Enthusiasts, DIY mechanics, service technicians working on Husqvarna SM 125 models. Competitive Analysis Competitors 1998: KTM EXC, Yamaha WR, Suzuki DR-Z, Honda CR/XR (motocross/enduro variants often adapted). Key Features Vehicle Supermoto Focus: Designed for on-road performance with supermoto styling, often derived from off-road platforms. Key Features Manual Comprehensiveness: Covers all aspects of repair and maintenance, aiming to reduce reliance on external service centers. Usability: Well-organized with a table of contents for easy navigation. 📋 Manual Details Coverage Areas Primary Coverage: Service, Repair, Maintenance, Troubleshooting Secondary Coverage: Wiring Diagrams, Technical Specifications Page Count Estimated Page Count: N/A (Digital format, typical for extensive service manuals) Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF 📖 Manual Coverage Systems Covered Engine: Comprehensive coverage including disassembly, inspection, assembly, timing, lubrication, cooling. Fuel System: Carburetor tuning, fuel pump, fuel lines, fuel tank inspection and cleaning. Ignition System: CDI unit, spark plugs, ignition timing, stator and rotor inspection. Transmission: Gearbox disassembly, inspection, assembly, clutch operation and adjustment, shifting mechanism. Chassis Suspension: Front fork (USD forks) servicing, rear shock absorber inspection and adjustment, linkage maintenance. Brakes: Hydraulic brake system, caliper servicing, master cylinder repair, brake pad replacement, bleeding procedures. Electrical System: Wiring diagrams, lighting system, battery maintenance, charging system, starter motor operation. Bodywork Frame: Frame inspection, body panel removal and installation, seat, handlebars, footpegs. Wheels Tires: Wheel bearing inspection, spoke tension, tire replacement, balancing. Procedures Included Maintenance: Scheduled maintenance intervals, oil changes, filter replacements, chain adjustment, general lubrication. Troubleshooting: Diagnostic guides for common and uncommon issues, symptom-based troubleshooting charts. Repair: Step-by-step repair instructions for all major components and systems. Disassembly Assembly: Detailed procedures for taking apart and putting back together various vehicle parts. Technical Specifications: Torque values, clearances, fluid capacities, electrical specifications. Wiring Diagrams: Complete electrical system schematics for easy fault finding and component identification. Technical Depth Depth: Comprehensive (covers everything from basic maintenance to full engine rebuilds and advanced diagnostics). 📊 Manual Specifications File Format Format: PDF Compatibility: Compatible with all Windows and Mac operating systems. Software Requirements: Adobe PDF Reader and WinZip (for potential compression). Print Quality Quality: High-resolution, suitable for printing individual pages or the entire manual. Binding Type Binding: Digital Download (N/A for physical binding) Paper Type Paper: N/A (Digital format) ⚙️ Engine Specifications Primary Engine Type: Liquid-cooled, 2-stroke, single-cylinder Displacement: 124.8 cc (approximate) Bore X Stroke: 54 mm x 54.5 mm (typical for this engine family) Power Output: Approx. 16-20 HP (factory detuned for street use, higher in race trim) Torque Output: N/A (Specific figures vary, but typically strong low-mid range for its class) Performance Compression Ratio: Typically around 8.0:1 to 8.5:1 Fuel System Carburetor: Dell'Orto PHBH 28 AS (common for this era and engine size) Fuel Type: Unleaded gasoline (minimum 95 RON recommended) Fuel Mixture: Pre-mix (1:30 or 1:40 ratio with high-quality 2-stroke oil, consult manual for exact spec) Lubrication Type: Autolube (oil injection system) Cooling System: Liquid-cooled 🔧 Transmission Standard Type: 6-speed manual sequential gearbox Optional Options: N/A for this model year Features Clutch: Hydraulically operated, wet multi-plate clutch Final Drive: Chain drive 📐 Dimensions Exterior Length: N/A (Consult manual for precise figures, typically around 2000-2100 mm) Width: N/A (Consult manual, typically around 800-850 mm) Height: N/A (Consult manual, typically around 1100-1200 mm) Weights Dry Weight: Approx. 95-105 kg (significant variation based on specific trim/options) Wet Weight: N/A (Consult manual) Payload Capacity: N/A (Motorcycle, rider weight is the primary consideration) 🛡️ Safety Features Ratings Crash Test: N/A (Motorcycles are not subject to automotive crash testing standards) Active Features Brakes: Hydraulic disc brakes front and rear. Suspension: Upside-down (USD) front forks and adjustable rear monoshock for improved handling...