This manual covers 125 SX, 125 EXC, 144 SX, 144 EXC, 150 SX, 150 EXC, 200 SX, and 200 EXC models produced between 1999 and 2010. Originating from Austria, the brand is renowned for its high-performance off-road motorcycles, and these models are celebrated for their lightweight chassis, potent two-stroke engines, and exceptional handling. They represent a significant part of the brand's legacy in motocross and enduro racing, often favored for their premium components and robust Austrian engineering. These motorcycles are designed for demanding off-road use, offering a thrilling riding experience and a competitive edge in their respective classes. This comprehensive service repair workshop manual provides detailed information essential for maintaining and repairing your motorcycle. It covers all critical systems, including the two-stroke engine, transmission, clutch, ignition, and exhaust, as well as the chassis, suspension, brakes, and electrical components. You will find step-by-step instructions for routine maintenance, such as oil changes and filter replacements, along with in-depth guidance for complex repairs, engine rebuilds, and troubleshooting common issues. This manual is an invaluable resource for owners, mechanics, and technicians, ensuring your vehicle operates at its peak performance and longevity. 🏷️ Basic Information Identification Make: KTM Model: 125 SX, 125 EXC, 144 SX, 144 EXC, 150 SX, 150 EXC, 200 SX, 200 EXC Year Range: 1999-2010 Codes Chassis Codes: Varies by model and year (e.g., SX models typically use SX chassis codes, EXC models use EXC chassis codes) Engine Codes: Varies by model and displacement (e.g., 125cc, 144cc, 150cc, 200cc) 👋 Introduction Market Position Segment: Off-road motorcycles (Motocross and Enduro) known for their performance-oriented nature and Austrian engineering. Competitive Analysis Key Competitors: Yamaha YZ125, YZ250, YZ250F; Honda CR125R, CR250R, CRF250X; Suzuki RM125, RM250, RM-Z250; Kawasaki KX125, KX250, KX250F Key Features Manual Value Proposition: Provides comprehensive, factory-level repair and maintenance information, empowering owners and independent workshops to perform all necessary tasks with confidence. Vehicle Strengths: Lightweight chassis, potent two-stroke engines (for their displacement), excellent handling characteristics, premium components typical of KTM. 📋 Manual Details Coverage Areas Primary Regions: Global (covering specifications and procedures applicable across most international markets for these models) Specific Models Covered: KTM 125 SX, KTM 125 EXC, KTM 144 SX, KTM 144 EXC, KTM 150 SX, KTM 150 EXC, KTM 200 SX, KTM 200 EXC Page Count Estimated Page Count: Hundreds (exact count not specified, but described as 'hundreds of pages' with detailed photos & diagrams) Manual Type Type: Service Repair Workshop Manual Language Language: English (implied by product description and common practice for such manuals) Format Format: Downloadable PDF 📖 Manual Coverage Systems Covered Powertrain: Engine (two-stroke), clutch, gearbox, ignition system, exhaust system Chassis: Frame, suspension (front forks, rear shock absorber), steering, wheels, brakes (front and rear), fuel tank, seat, bodywork, electrical system (lighting, wiring harness) Procedures Included Maintenance: Routine servicing, oil changes, filter replacements, chain adjustment, spark plug service, decarbonization Repair: Engine rebuilds (top-end and bottom-end), transmission overhauls, suspension component replacement, brake caliper servicing, carburetor tuning, electrical fault diagnosis and repair Troubleshooting: Diagnostic procedures for common issues, performance problems, starting difficulties, electrical faults Technical Depth Depth: Comprehensive; covers everything from basic maintenance to complete engine and chassis overhauls, including detailed exploded diagrams and step-by-step instructions. 📊 Manual Specifications File Format File Type: PDF Searchable: Likely searchable if OCR processed, though not explicitly stated. Typical for professional PDFs. Print Quality Printable: Yes, single pages or the entire manual can be printed. Binding Type Binding: N/A (Digital download) Paper Type Paper Quality: N/A (Digital download) Usage Rights Device Compatibility: Compatible with unlimited computers (Windows & MAC), tablets, and smartphones. Licensing: Full, unlimited use for life; no expiry dates or renewal fees. ⚙️ Engine Specifications Primary Engine Type: Two-stroke, single-cylinder, liquid-cooled Displacements: 125cc, 144cc, 150cc, 200cc (specific to models) Bore X Stroke: Varies by displacement (e.g., 125cc models often around 54mm x 54.5mm, 200cc models around 64mm x 62.4mm) Performance Horsepower: Estimated 30-40+ HP depending on model and year (typical for this class) Torque: Estimated 20-25+ Nm depending on model and year Fuel System Carburetor: Typically Keihin PWK or similar, sized appropriately for displacement (e.g., 36-38mm). Fuel Type: Unleaded gasoline with appropriate two-stroke oil pre-mix (ratio typically 1:30 or 1:40, check manual for specifics) Ignition System Type: Digital CDI (Capacitor Discharge Ignition) with variable ignition timing. Lubrication System: Premix fuel/oil system, gearbox oil. 🔧 Transmission Standard Type: 6-speed manual transmission Optional Options: N/A (Standard configuration) Features Clutch: Hydraulically operated multi-plate wet clutch Gear Ratios: Specific ratios vary by model year and variant; detailed in the manual. Fluid Specifications Gearbox Oil: Typically SAE 10W/40 or 15W/50 API SG or higher, manual specific. 📐 Dimensions Exterior Wheelbase: Varies by model and year, typically around 1440-1470 mm. Weights Dry Weight: Approximately 95-105 kg (depending on model and equipment). Fuel Tank Capacity: Typically 7-9 liters (depending on model and year). 🛡️ Safety Features Ratings Crash Safety:...