This manual covers the 2007 450 SX-F, 505 SX-F, and SXS-F models, featuring the LC4 engine platform. An Austrian manufacturer renowned for its off-road racing prowess, engineered these competition dirt bikes for peak performance. The 450 and 505 variants, powered by robust four-stroke, single-cylinder LC4 engines, offer significant power output, with displacements of approximately 449.3 cc and 502.9 cc respectively. These models are built for the demanding environment of motocross, emphasizing reliability and rider-focused design. This factory service repair manual provides comprehensive guidance for engine service and repair, extending to electrical systems, the fuel system, and essential maintenance schedules. It details complete engine disassembly and reassembly, including internal components like the crankshaft, piston, and valve train. Troubleshooting guides and wiring diagrams are included to assist with diagnostics. The manual is designed to empower both DIY enthusiasts and experienced mechanics to maintain and repair these high-performance machines effectively, ensuring optimal operation and longevity. 🏷️ Basic Information Identification Make: KTM Model: 450 SX-F / 505 SX-F / SXS-F Year: 2007 Codes Engine Designation: LC4 (for 450/505 SX-F, SXS-F variants) 👋 Introduction Market Position Target Audience: DIY enthusiasts and experienced mechanics working on 2007 KTM 450/505 SX-F/SXS-F engines. Competitive Analysis Advantage Over Paper: Cost-effective, convenient digital format, easily printable, no wear-and-tear compared to traditional manuals. Key Features Content Richness: Hundreds of pages with step-by-step instructions, photos, and illustrations for complete disassembly and repair. Accessibility Features: No expiry dates, instant download, compatibility with various devices and operating systems. Content Benefit: Empowers users to save money on labor costs by performing repairs themselves. 📋 Manual Details Coverage Areas Primary Focus: Engine Service and Repair Additional Coverage: Electrical, Fuel System, Troubleshooting, Maintenance Schedule, Wiring Diagrams Variant Coverage: Covers both 450 SX-F and 505 SX-F, as well as SXS-F (factory racing) variants of the 2007 engine, indicating comprehensive coverage for all styles. Page Count Estimated Pages: Hundreds (specific count not provided, but indicated as comprehensive) Manual Type Type: Factory Service Repair Manual / Workshop Manual Language Language: English Format Format: PDF File Requirements: Adobe PDF Reader and Winzip (free to download) 📖 Manual Coverage Systems Covered Engine Mechanical: Complete disassembly and reassembly of the engine, component servicing. Engine Electrical: Engine-related electrical systems, wiring diagrams. Fuel System: Carburetion (likely Keihin FCR series), fuel delivery components. Internal Engine Components: Crankshaft, connecting rod, piston, cylinder, cylinder head, valve train (camshafts, valves, springs, retainers), oil pump, water pump. Ignition System: Details on spark plug type, gap, and potentially ignition coil testing. Exhaust System: While primarily engine focused, might include information on exhaust gasket replacement or related engine components. Procedures Included Major Repairs: Engine removal and refitting, complete engine disassembly and assembly. Maintenance: Periodic maintenance schedule, fluid changes, component checks. Troubleshooting: Diagnostic procedures for common issues. Assembly Verification: Torque specifications for all critical fasteners, assembly sequences, critical measurements for component wear. Special Tools: Likely mentions necessary specialized tools for engine disassembly and reassembly. Technical Depth Depth: Comprehensive, from basic maintenance to full engine rebuilds, with detailed illustrations. Diagnostic Charts: Troubleshooting sections likely include symptom-based diagnostic charts. 📊 Manual Specifications File Format Compatibility: All Windows and Mac versions Accessibility: Accessible via web browser on any computer or mobile device Print Quality Printability: Fully printable by section or in its entirety Binding Type Type: Digital (PDF) - no physical binding Paper Type Type: N/A (digital format) ⚙️ Engine Specifications Primary Engine Engine Type: Four-stroke, single-cylinder (LC4 platform) Displacement 450: Approximately 449.3 cc (specific bore/stroke values not in product info but common for this model) Displacement 505: Approximately 502.9 cc (specific bore/stroke values not in product info but common for this model) Performance Horsepower Estimate: Likely in the 50-60 HP range (stock configuration, depends on specific tuning and race variants like SXS-F) Torque Estimate: Likely in the 45-50 Nm range (stock configuration) Fuel System Carburetor Model: Likely Keihin FCR 39 (or similar performance carburetors for SXS-F variants) Fuel Type: Unleaded gasoline (high octane recommended) Cooling System Type: Liquid-cooled, with integrated oil cooler (common for these models) Bore Stroke Bore Stroke 450: Typical for 450: ~95mm bore x 63.4mm stroke Bore Stroke 505: Typical for 505: ~97mm bore x 67.5mm stroke 🔧 Transmission Standard Type: Manual (typically 5-speed or 6-speed, depending on specific SX-F/SXS-F variant) Optional Type: N/A (these are competition motorcycles) Features Clutch: Hydraulically operated, multi-plate wet clutch 📐 Dimensions Exterior Vehicle Type: Motocross / Competition Dirt Bike (engine is the focus, but context is for the bike) Weights Dry Weight Estimate: Around 105-110 kg (specific to bike model, not engine alone) 🛡️ Safety Features Ratings Vehicle Safety Standard: Not applicable in the context of typical automotive safety ratings; focused on rider safety through reliable operation. Active Features Braking System: Hydraulic disc brakes (front and rear) - covered in detail in a full bike manual, but engine manual might touch on related components like starter...