🏷️ Basic Information Identification Make: KTM Model: 125 SX, 200 SX, 125 MXC, 200 MXC, 125 EXC, 200 EXC Year: 2003 Codes Engine Code 125: LC2 125 Engine Code 200: LC2 200 👋 Introduction Market Position Segment: Off-road motorcycles (Motocross, Enduro, Cross-Country). Target Audience: KTM owners performing DIY maintenance, repairs, and rebuilds. Competitive Analysis Competitors 2003: Yamaha YZ125/250, Suzuki RM125, Honda CR125R, Kawasaki KX125; Husqvarna, Beta. Key Features Manual Value Proposition: Provides in-depth technical knowledge crucial for maintaining and repairing high-performance KTM off-road machines. Kew Selling Points: Covers multiple popular models and variants within the 125cc and 200cc displacement range for the specific year. 📋 Manual Details Coverage Areas Models Covered: KTM 125 SX, 200 SX, 125 MXC, 200 MXC, 125 EXC, 200 EXC Model Years: 2003 Page Count Estimated Pages: 300+ Manual Type Type: Full Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine Mechanical: Complete engine overhaul, rebuild procedures, piston, cylinder, crankshaft, connecting rod, valve timing, lubrication system. Engine Electrical: Ignition system, CDI unit, spark plug, stator, wiring diagrams, troubleshooting electrical faults. Fuel System: Carburetor tuning and rebuilding (Mikuni VM series), fuel tank, fuel lines, fuel filter replacement. Cooling System: Radiator, coolant, water pump, hoses, thermostat (if applicable). Transmission: Gearbox disassembly and assembly, clutch operation and replacement, shift mechanism, gearbox oil specifications and change intervals. Suspension Front: Front fork disassembly, service, seal replacement, oil level and type, spring rates, damping adjustments. Brakes Front: Brake caliper service, master cylinder overhaul, brake pad replacement, fluid type and bleeding procedure, rotor specifications. Wheels Tires: Wheel bearing maintenance, spoke tensioning, tire pressure recommendations, tire size specifications. Frame Chassis: Frame inspection, steering head bearing service, swingarm maintenance. Exhaust System: Exhaust pipe and silencer maintenance, checking for leaks. Suspension Rear Suspension Rear: Rear shock absorber service, linkage maintenance, spring preload adjustment. Brakes Rear Brakes Rear: Rear brake system service, caliper, master cylinder, pad replacement, fluid type, bleeding. Procedures Included Maintenance: Routine checks, lubrication points, air filter cleaning/replacement, spark plug replacement, chain adjustment and lubrication. Troubleshooting: Diagnostic flowcharts for common problems, electrical fault finding, engine performance issues. Repair: Step-by-step instructions for component replacement and repair across all major systems. Rebuild: Detailed procedures for complete engine and gearbox rebuilds. Installation: Instructions for installing common aftermarket parts or performing specific upgrades. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to full engine and gearbox rebuilds. 📊 Manual Specifications File Format File Type: PDF Searchable: Yes (typically for PDF manuals) Print Quality Printability: Printable (standard PDF feature) Binding Type Binding: N/A (Digital PDF) Paper Type Paper Quality: N/A (Digital PDF) ⚙️ Engine Specifications Primary Engine Type 125: Single-cylinder, 2-stroke, liquid-cooled (LC2). Bore X Stroke 125: 54.0 mm x 54.5 mm (typical). Displacement 125: 124.8 cc Type 200: Single-cylinder, 2-stroke, liquid-cooled (LC2). Bore X Stroke 200: 62.5 mm x 65.0 mm (typical). Displacement 200: 197.5 cc Performance Horsepower 125 Est: ~30-35 HP Horsepower 200 Est: ~40-45 HP Fuel System Carburetor Model: Mikuni VM28SS (common for 125/200 SX models, other variants may use different specs). Fuel Type: Unleaded gasoline (minimum 91 octane recommended), mixed with 2-stroke oil. Premix Ratio: Typically 40:1 or 50:1 (refer to manual for exact specification). Lubrication Oil Type Premix: High-quality 2-stroke motorcycle oil. 🔧 Transmission Standard Type: 6-speed constant mesh manual transmission. Features Clutch Type: Wet multi-plate clutch. Gearbox Oil Type: SAE 10W-40 motorcycle gear oil (refer to manual for exact specification). Gearbox Oil Capacity: Approx. 0.65 Liters (refer to manual for exact specification). 📐 Dimensions Exterior Frame Type: Chromium-molybdenum steel trellis frame. Weights Dry Weight 125 Approx: 90-95 kg Dry Weight 200 Approx: 95-100 kg Fuel Capacity: 7.5 - 9.0 Liters (varies by model variant). 🛡️ Safety Features Ratings Crash Test Ratings: N/A (Off-road motorcycles typically not subjected to standard road vehicle crash tests). Active Features Braking System: Hydraulic disc brakes front and rear. Passive Features Lighting: Headlight, taillight, brake light (for EXC/MXC models, SX models may have minimal lighting). 💡 Technology Features Infotainment Infotainment Systems: N/A (Minimal to no electronics beyond ignition and lighting). Driver Assistance Assistance Features: N/A (Focus is on rider control and mechanical systems). Connectivity Connectivity Features: N/A 🔧 Maintenance Service Intervals Oil Change Gearbox: Every 10-15 operating hours or annually. (Refer to manual for specific intervals). Air Filter Cleaning: After every few rides or when visibly dirty. (More frequently in dusty conditions). Spark Plug Replacement: Every 20-30 operating hours or as needed based on condition. Piston Ring Replacement: Every 50-70 operating hours (performance dependent). Top End Rebuild: Every 100-150 operating hours (piston, rings, possibly cylinder honing). Fluid Specifications Fork Oil Type: WP Suspension Fluid (or equivalent SAE 5W/7.5W fork oil). Capacity: ~300-350 ml per leg (refer to manual). Brake Fluid Type: DOT 4 brake fluid. Known Issues Common Wear Items: Clutch plates, piston rings, wheel bearings, steering head bearings, fork seals. Carburetor...