This manual provides comprehensive factory service and repair information for the FX Shovelhead motorcycle from 1973. Known for its iconic Shovelhead V-twin engine and the FX chassis, this model represents a significant era in American motorcycle manufacturing. The Shovelhead engine, typically air-cooled and available in displacements around 74 or 80 cubic inches, delivered robust performance for its time, making the FX a popular choice for riders and custom builders alike. This workshop service repair manual covers all styles of the FX Shovelhead, offering detailed technical data and procedures to maintain its legendary performance and reliability. The purpose of this manual is to serve as an indispensable resource for both do-it-yourself enthusiasts and professional mechanics. It details a wide range of systems, including complete engine overhaul, transmission service, clutch maintenance, primary drive, fuel system, exhaust, electrical system, front and rear suspension, steering, and brakes. The manual includes periodic maintenance schedules, tune-up procedures, troubleshooting guides, and step-by-step repair instructions, all supported by hundreds of photos and illustrations. Its factory-level technical depth and user-friendly format, featuring numbered instructions and an index, ensure efficient information retrieval for all aspects of servicing and repairing your 1973 FX Shovelhead. 🏷️ Basic Information Identification Make: Harley-Davidson Model: FX Shovelhead Year: 1973 Codes Engine Designation: Shovelhead Chassis Designation: FX 👋 Introduction Market Position Target Audience: Do-it-yourselfer (DIY) and experienced mechanics Value Proposition: Inexpensive way to keep the vehicle working properly, comprehensive resource Competitive Analysis Advantage: Complete official factory manual, avoids shipping delays and costs of physical copies Key Features User Friendliness: Numbered table of contents for fast information retrieval, bold figure numbers for quick illustration matching Navigability: Index included for efficient searching 📋 Manual Details Coverage Areas Overall Scope: Complete factory service and repair Styles Covered: All Page Count Estimated Pages: Hundreds Manual Type Type: Workshop Service Repair Manual Language Language: English Format Format: PDF Download 📖 Manual Coverage Systems Covered Engine: Complete engine overhaul, disassembly, reassembly, tuning Transmission: Service, repair, and adjustment of transmission components Clutch: Maintenance and repair of the clutch system Primary Drive: Detailed coverage of the primary drive system Fuel System: Carburetor service, fuel lines, fuel tank maintenance Exhaust Systems: Installation, maintenance, and troubleshooting of exhaust components Electrical System: Wiring diagrams, ignition system, lighting, charging system diagnostics Front Suspension: Fork service, bearings, and adjustments Rear Suspension: Shock absorber service, linkage maintenance Steering: Headset service and adjustment Brakes: Front and rear brake system service and maintenance Kickstarter: Service and repair of the kickstart mechanism Procedures Included Maintenance: Periodic lubrication, fluid changes, component checks Tune Up: Comprehensive engine tuning procedures Troubleshooting: Diagnostic guides for common and complex issues Repair: Step-by-step repair instructions for all major components Disassembly Reassembly: Complete disassembly and reassembly guidance Technical Depth Depth: Detailed, factory-level technical information suitable for DIY and professional mechanics Illustrations: Hundreds of photos and illustrations Instruction Format: Numbered instructions, detailed substeps, notes, cautions, and warnings Diagnostic Focus: Specific focus on electrical system diagnostics with combined troubleshooting and wiring diagrams 📊 Manual Specifications File Format Format: PDF Compatibility: All PC-based Windows operating systems and Mac Print Quality Printability: Printable without any restriction (entire manual or specific pages) Binding Type Binding: N/A (Digital Download) Paper Type Paper Type: N/A (Digital Download) Requirements Software: Adobe PDF Reader Delivery Method: Instant download link on checkout page ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled V-twin (Shovelhead) Displacement: Typically 74 cubic inches (1200cc) for this era, potential for 80 cubic inches (1340cc) variants. Specific displacement for 1973 FX models should be confirmed by VIN, but the manual covers the Shovelhead architecture. Bore X Stroke: For 74ci: 3.4375 in x 4.25 in (87.31 mm x 107.95 mm). For 80ci: 3.50 in x 4.25 in (88.9 mm x 107.95 mm). Compression Ratio: Typically around 8.0:1 to 8.5:1 depending on factory specifications and potential modifications. Performance Horsepower: Estimated 55-65 hp at rear wheel (depending on specific configuration and tuning). Torque: Estimated 65-75 ft-lbs (depending on specific configuration and tuning). Fuel System Carburetor: Typically a Keihin butterfly or Linkert carburetor, or potentially a later S&S Super E/G for aftermarket upgrades. Manual covers service for stock configurations. Fuel Type: Unleaded gasoline, octane rating typically 87 or higher. Engine Construction Cylinder Block: Cast iron Cylinder Heads: Aluminum alloy Cooling System: Air-cooled 🔧 Transmission Standard Type: 4-speed constant mesh, manual clutch operation Optional Gearbox Layout: The manual covers the standard 4-speed gearbox used in the FX models. Features Primary Drive Type: Chain drive, enclosed in a primary cover. Fluid Specifications Transmission Fluid: Refer to manual for specific viscosity and type, commonly SAE 50W or similar for the gearbox. Primary Chain Case Fluid: Typically Harley-Davidson primary lubricant or an equivalent specified in the manual. 📐 Dimensions Exterior Wheelbase: Varies by FX model specifics, typically around 60-62 inches. Length: Varies by FX model specifics, typically around 87-90 inches. Weights Dry Weight: Approximately 550-600...