This manual covers the 450 SX-F and XC-F models produced for the 2016, 2017, and 2018 model years. These motorcycles are engineered as high-performance machines for motocross and cross-country competition, renowned for their powerful single-cylinder, 4-stroke engines and advanced WP suspension systems. Their design emphasizes agility, responsiveness, and race-winning capability, making them a formidable choice for riders seeking a competitive edge. The robust Chromium-molybdenum steel frame provides a stable and precise platform, while features like selectable engine maps and traction control (on applicable models) further enhance their performance in various demanding conditions. This comprehensive workshop service repair manual provides detailed procedures for all aspects of maintenance, troubleshooting, and repair for your 450 SX-F/XC-F. It includes in-depth coverage of the engine, transmission, fuel system, suspension, brakes, and electrical systems, with specific guidance on component disassembly, reassembly, and rebuilds. Essential information such as torque specifications, required special tools, and fluid recommendations is also included. This manual is designed to assist owners, mechanics, and technicians in ensuring the optimal performance, reliability, and longevity of their competition motorcycles through accurate and thorough service practices. 🏷️ Basic Information Identification Make: KTM Model: 450 SX-F / XC-F Years Covered: 2016, 2017, 2018 Product Type: Complete Workshop Service Repair Manual 👋 Introduction Market Position Positioning: High-performance motocross and cross-country competition machines Competitive Analysis Competitors: Yamaha YZ450F, Honda CRF450R, Kawasaki KX450F, Suzuki RM-Z450 Key Features Engine Type: Single-cylinder, 4-stroke, SOHC Suspension Type: WP AER (air-sprung front forks), WP DCC (dual compression control) rear shock Chassis: Chromium-molybdenum steel central double-cradle frame Electronics: Selectable engine maps, traction control (on some models/years) 📋 Manual Details Coverage Areas Coverage Scope: Complete service and repair procedures Page Count Estimated Pages: Extensive (specific number not provided, but described as 'Complete') Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: Downloadable 📖 Manual Coverage Systems Covered Engine: Detailed engine overhaul, troubleshooting, diagnostics, specific component repair (e.g., cylinder head, piston, crankshaft, valve train, oil pump) Transmission: Clutch, gearbox assembly, shift mechanism, internal components Fuel System: Fuel injection system, throttle body, fuel pump, injectors, pressure regulator Ignition System: Ignition coil, spark plug, ECU control, timing Cooling System: Radiator, water pump, coolant flow, thermostat Exhaust System: Muffler, header pipe, catalytic converter (if applicable) Suspension: Front forks (WP AER/USD), rear shock absorber, linkages, seals, oil levels, valving Brakes: Hydraulic brake systems (front and rear), caliper service, master cylinders, brake fluid specifications, bleeding procedures Wheels And Tires: Spoke tightening, rim maintenance, tire pressure specifications Electrical System: Wiring diagrams, battery, starter motor, lighting, sensors, ECU troubleshooting Chassis And Frame: Frame inspection, headstock bearings, subframe Bodywork And Plastics: Fairing removal and installation, seat, fuel tank Procedures Included Maintenance: Oil change, filter replacement, chain adjustment, valve clearance checks, spark plug replacement Troubleshooting: Diagnostic flowcharts, common fault identification, solutions for various performance issues Repair: Complete disassembly and reassembly of all major components Rebuilds: Engine rebuilds, gearbox overhauls, suspension fork and shock rebuilds Torque Specifications: Detailed torque values for all critical fasteners Special Tools: Identification of required special tools for specific procedures Technical Depth Depth: Comprehensive, covering basic maintenance to complete engine and component rebuilds 📊 Manual Specifications File Format Format: Digital Downloadable (likely PDF) Print Quality Quality: High-resolution, suitable for printing individual pages or the entire manual Binding Type Binding: N/A (Digital Format) Paper Type Paper: N/A (Digital Format) ⚙️ Engine Specifications Primary Engine Engine Type: 4-stroke, single-cylinder, liquid-cooled, SOHC Displacement: 449.3 cc Bore X Stroke: 95 x 63.4 mm Compression Ratio: Typically around 12.7:1 (check specific model year for exact) Performance Horsepower: Approx. 60-63 HP (at crankshaft, unconfirmed without manual specific data) Torque: Approx. 48-50 Nm (at crankshaft, unconfirmed without manual specific data) Fuel System Fuel Delivery: Keihin EFI (Electronic Fuel Injection), dual throttle body (2016-2017), single throttle body (2018) Fuel Type: Unleaded gasoline, minimum 95 RON (octane rating may vary) Lubrication Oil Type: High-performance synthetic motorcycle oil (e.g., Motorex Power Synt 4T 10W/50) Oil Capacity: Approx. 1.1 - 1.2 Liters (check manual for exact dry/wet fill) Ignition Ignition System: Digital CDI with dual ignition mapping 🔧 Transmission Standard Type: 4-speed or 5-speed (depending on specific SX-F or XC-F variant and year) Clutch: Wet multi-disc clutch (DS - Diaphragm Spring clutch) Features Gear Ratios: Specific gear ratios are detailed within the manual for each model year and variant. Final Drive: Chain drive 📐 Dimensions Exterior Frame: Chromium-molybdenum steel central double-cradle frame Front Suspension: WP AER 48, 48mm USD air-oil separated fork Rear Suspension: WP DCC (Dual Compression Control) monoshock with linkage Front Brake: 260mm disc with Brembo 2-piston caliper Rear Brake: 248mm disc with Brembo 1-piston caliper Front Tire: 80/100-21 Rear Tire: 110/90-19 or 120/90-19 Weights Dry Weight: Approx. 100.5 kg (221.6 lbs) (without fuel, specific weight varies slightly by year/model) 🛡️ Safety Features Ratings Ratings: N/A (Competition off-road motorcycles are not typically subjected to standard road vehicle safety ratings...