🏷️ Basic Information Identification Make: Harley-Davidson Model: FLH Shovelhead Year: 1981 Codes Engine Family Code: Shovelhead Generation Platform Generation: Fourth Generation (Shovelhead Evolution) 👋 Introduction Market Position Target Audience: Harley-Davidson FLH Shovelhead 1981 owners, mechanics, restorers, and enthusiasts. Competitive Analysis Manual Authenticity: Genuine Factory Service Manual, not a third-party reproduction, ensuring accuracy and completeness. Key Features Usability: Easy to use, printable format, searchable text for quick information retrieval. Cost Effectiveness: Enables DIY servicing, saving an estimated $50-$60 per hour in shop labor costs. Content Highlight: Detailed substeps, notes, cautions, warnings, numbered instructions, bold figure numbers, detailed illustrations, and enlarged insets. Content Structure: Numbered instructions, notes, cautions, warnings, detailed illustrations, and enlarged insets guide users through procedures. 📋 Manual Details Coverage Areas Primary Coverage: FLH Shovelhead models Style Coverage: All Styles Covered Page Count Estimated Page Count: Hundreds of pages Manual Type Type: Factory Service Repair Manual Language Language: English Format Format: PDF Download Delivery Method: Digital download link provided after payment confirmation. 📖 Manual Coverage Systems Covered Engine Systems: Engine assembly, disassembly, troubleshooting, maintenance, tune-up, lubrication, fuel system, exhaust systems, engine management systems. Drivetrain Systems: Clutch, primary drive, transmission, Kickstarter. Chassis Systems: Front suspension, steering, rear suspension, brakes. Electrical Systems: Electrical system diagnosis, wiring diagrams, troubleshooting. Indexing: Index included for quick reference. Wiring Diagrams: Detailed wiring diagrams provided for electrical system troubleshooting and tracing. Index Availability: Yes, an index is provided. Procedures Included Maintenance Procedures: Periodic lubrication, routine maintenance, tune-ups, fluid checks and changes. Repair Procedures: Step-by-step repair instructions for all covered systems, including component replacement and adjustments. Diagnostic Procedures: Fault symptom diagnosis, part testing using specialized techniques, advanced troubleshooting guide. Troubleshooting Guide: Advanced troubleshooting guide included to help diagnose and correct any problem, with specific fault symptom analysis. Owner Empowerment: Enables owners to make informed decisions about maintenance and repairs, and to effectively communicate with mechanics. Technical Depth Depth: Comprehensive, covering everything from basic maintenance to complete rebuilds and restoration. Includes factory-trained technician knowledge. Diagnostic Techniques: Includes techniques used by top mechanics for testing suspected parts. Completeness: Covers everything needed to repair, maintain, rebuild, refurbish, or restore the vehicle. 📊 Manual Specifications File Format Format: PDF Compatibility: Compatible with Windows and Mac operating systems, requires Adobe PDF Reader. Searchability: Search function available within the PDF for locating specific information quickly. Print Quality Printability: Printable without restriction; individual pages, chapters, or the entire manual can be printed. Binding Type Binding: N/A (Digital Download - Printable) Paper Type Paper Type: N/A (Digital Download - Printable) ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled, OHV, V-twin Engine Family: Shovelhead Performance Displacement Liters: 1.34 L (82 cu in) Bore X Stroke Inches: 3.4375 in x 4.25 in Fuel System Carburetion: Typically a Keihin butterfly or Linkert carburetor (specific model dependent, covered in manual). Fuel Type: Unleaded gasoline (manual will specify octane rating and fuel system adjustments for unleaded). Engine Management Systems Ignition System: Breaker point ignition or early electronic ignition (details covered in manual). Carburetor Information: Detailed information on carburetor identification, disassembly, cleaning, and adjustment is covered. 🔧 Transmission Standard Transmission Type: 4-speed constant mesh, foot shift, hand clutch (typical for FLH). Optional Optional Transmission: N/A for factory manual coverage of 1981 FLH. Features Clutch Type: Wet multi-plate, cable-actuated. Primary Drive Type: Duplex chain in a primary chaincase with chain oil. 📐 Dimensions Exterior Wheelbase Inches: Approximately 61.5 - 63.5 inches (varies by specific FLH model, manual will detail). Weights Dry Weight Lbs: Approximately 700-750 lbs (varies by specific FLH model, manual will detail). Gross Vehicle Weight Rating Lbs: Typically around 1160 lbs (manual will specify exact GVWR). 🛡️ Safety Features Ratings Safety Certification: Not applicable in the modern sense of crash test ratings for motorcycles of this era; focus is on mechanical integrity and operational safety. Active Features Braking System: Hydraulic disc brakes front and rear (e.g., front disc brake, rear drum brake or dual disc depending on specific FLH variant covered). Passive Features Lighting System: Headlight, tail light, brake light, turn signals (all covered in electrical section). 💡 Technology Features Infotainment Infotainment Features: Basic analog instrumentation: speedometer, tachometer (optional), oil pressure light, neutral indicator, turn signal indicators. Driver Assistance Driver Assistance Features: None (pre-dates modern driver assistance systems). Connectivity Connectivity Features: None. 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 2,000-3,000 miles or as per manual recommendations for primary oil, engine oil, and transmission oil. Spark Plug Replacement: As recommended, often around 10,000 miles, but checking condition is key. Fluid Specifications Engine Oil Type: Viscosity grades such as 20W-50 or 50W are common for air-cooled V-twins of this era. Manual will specify exact grade and API service classification. Primary Chaincase Oil Type: Dedicated primary oil or specific motorcycle transmission fluid. Manual will specify exact type and quantity. Transmission Oil Type: Typically heavier gear oil or specific transmission lubricant. Manual will...