This manual covers the 450 SX-F/SXS-F and 505 SX-F/SXS-F engine repair for model years 2007 through 2011. These motorcycles are renowned for their off-road racing heritage, and the SX-F series represents the pinnacle of their motocross competition machines. These single-cylinder, 4-stroke motorcycles are engineered for high performance, featuring advanced chassis and powerful engines, typically around 450cc or 505cc, and are liquid-cooled. They utilize a constant-mesh, sequential 5-speed gearbox and a hydraulically operated, multi-plate wet clutch. The focus of these models is on raw performance and rider control, making them popular choices for competitive motocross riders. This comprehensive Factory Service Manual provides detailed information essential for the maintenance and repair of your engine. It covers engine assembly and disassembly, internal component service and repair, and diagnostics for performance issues. You will find step-by-step procedures for engine removal, refitting, and complete engine rebuilds, along with detailed specifications, tolerances, and torque values. The manual also includes information on periodic maintenance, fluid changes, valve adjustments, and troubleshooting common problems, making it an indispensable resource for owners, independent repair shops, and performance tuners. 🏷️ Basic Information Identification Make: KTM Model: 450 SX-F/SXS-F, 505 SX-F/SXS-F Product Type: Engine Repair Manual Codes Relevant Model Years: 2007, 2008, 2009, 2010, 2011 👋 Introduction Market Position Target Audience: KTM owners, independent repair shops, performance tuners specializing in off-road motorcycles. Competitive Analysis Value Proposition: Provides factory-level technical data and repair procedures, essential for accurate and efficient maintenance and repair of KTM 450/505 SX-F/SXS-F engines. Key Features Content Quality: Directly mirrors the information used by authorized KTM service centers. Practical Application: Empowers users to perform complex engine repairs and diagnostics with confidence. 📋 Manual Details Coverage Areas Primary Focus: Engine internal components, repair, and maintenance. Page Count Number Of Pages: 132 Manual Type Manual Classification: Factory Service Manual / Workshop Manual Language Language: English Format File Format: PDF Digital Delivery: Downloadable 📖 Manual Coverage Systems Covered Engine Systems: Engine assembly, disassembly, internal components (pistons, rings, valves, camshafts, crankshafts, connecting rods, lubrication system, cooling system), cylinder head, engine block. Ancillary Systems: Fuel system (carburetor or EFI depending on specific model variant), ignition system basics related to engine function, lubrication system diagnostics. Procedures Included Disassembly Assembly: Complete step-by-step engine removal and refitting, full engine disassembly and reassembly procedures. Servicing Repair: Servicing individual engine components, component inspection and wear limits, repair procedures for common failures. Diagnostics Troubleshooting: Detailed troubleshooting guides for engine performance issues, diagnostic flowcharts, common problem identification. Maintenance: Periodic maintenance schedules, fluid changes, filter replacements, valve adjustments. Technical Depth Depth Of Information: Comprehensive, suitable for professional technicians; detailed specifications, tolerances, and torque values. 📊 Manual Specifications File Format Printability: Yes Searchability: Typically searchable within PDF viewer Compatibility Operating Systems: Windows / MacOS Requirements Software Requirements: Adobe PDF Reader ⚙️ Engine Specifications Primary Engine Engine Type: Single-cylinder, 4-stroke, SOHC (for 450 SX-F/SXS-F and 505 SX-F/SXS-F, specific configurations may vary by year and sub-model; consult manual for precise details). Engine Displacement: Approx. 450cc (450 SX-F/SXS-F) and 505cc (505 SX-F/SXS-F). Exact displacement values are critical and detailed in the manual. Performance Power Output: Varies by model year and specific variant. Typical figures for this era's SX-F models range from 50-60+ HP. Manual provides exact specifications. Torque Output: Varies by model year and specific variant. Manual provides exact specifications. Fuel System Fuel Delivery: Likely Keihin FCR carburetors for earlier models, potentially transitioning to electronic fuel injection (EFI) for later years. Manual specifies for each model variant. Recommended Fuel: Unleaded gasoline with a minimum octane rating of 95 RON (Research Octane Number) or equivalent. Manual provides precise octane recommendations and any fuel additives to avoid. Cooling System Cooling Method: Liquid-cooled Lubrication System Oil Type: Specialized 4-stroke motorcycle oil, typically synthetic or semi-synthetic, with specific JASO MA/MA2 rating. Manual specifies viscosity grade (e.g., 10W-50, 15W-50) and API classification. Example: Motorex Power Synt 4T 10W-50. Oil Capacity: Typically around 1.0 - 1.2 liters (engine oil and gearbox oil may share or be separate depending on exact KTM design for this period). Manual provides precise capacities for engine and clutch/gearbox. 🔧 Transmission Standard Transmission Type: Constant-mesh, sequential 5-speed gearbox (typical for SX-F models). Optional Gearbox Options: Not applicable; single gearbox configuration per model. Features Clutch Type: Hydraulically operated, multi-plate wet clutch (e.g., Magura hydraulic system). Gear Ratios: Specific gear ratios are detailed within the manual for optimal performance tuning and repair. Fluid Specifications Gearbox Oil Type: If separate from engine oil, typically a dedicated transmission oil or a high-quality motorcycle gear oil. Manual specifies viscosity and type. Example: Motorex Gear Oil 75W. 📐 Dimensions Exterior Wheelbase: Varies by model and year; typically around 1470-1485 mm. Manual provides exact dimensions. Weights Dry Weight: Approximately 105-110 kg (dry, unladen weight). Manual provides exact specifications. 🛡️ Safety Features Ratings Safety Standards: N/A for off-road competition motorcycles; focus is on operational safety and rider...