🏷️ Basic Information Identification Make: Harley-Davidson Model: FX Softail Year: 1985-1990 Codes Chassis Code Range: FXST, FXSTS, FXSTC (specific variants may vary) 👋 Introduction Market Position Target Audience: Harley-Davidson owners, DIY mechanics, professional technicians, and enthusiasts performing maintenance and repairs. Competitive Analysis Value Proposition: Provides comprehensive, factory-level repair information in a convenient digital format, offering significant cost savings over dealership service. Key Features Content Source: Authentic factory service manual content, ensuring accuracy and completeness. Accessibility: Instant download for immediate access across multiple devices. Completeness: Full, unrestricted version covering all aspects of repair and maintenance. 📋 Manual Details Coverage Areas Primary Coverage: All mechanical, electrical, and bodywork systems for 1985-1990 Harley-Davidson FX Softail models. Specific Variants: Includes standard FX Softail, Springer Softail (FXSTS), and Custom Softail (FXSTC) variants where applicable. Page Count Estimated Page Count: Hundreds (as stated in product description) Manual Type Type: Factory Service & Repair Workshop Manual Language Language: English Format Format: Digital Download (PDF) 📖 Manual Coverage Systems Covered Powertrain: Engine (Evolution Big Twin), transmission, clutch, final drive. Chassis: Frame, suspension (front forks, rear shock absorbers), wheels, brakes, steering. Electrical: Ignition system, lighting, charging system, starting system, battery, wiring diagrams, instruments, controls. Fuel System: Carburetor (e.g., Keihin CV), fuel tank, fuel lines, fuel pump (if applicable). Exhaust System: Exhaust pipes, mufflers, mounting hardware. Bodywork: Fenders, fuel tank, seat, fairings (if equipped), saddlebags (if equipped), mounting hardware. Procedures Included Maintenance: Oil changes, filter replacements, spark plug replacement, chain adjustment, lubrication, tire pressure checks, brake pad inspection. Troubleshooting: Diagnosis of common starting issues, running problems, electrical faults, braking system anomalies. Repair: Engine overhaul, transmission rebuild, clutch service, fork seal replacement, brake caliper overhaul, carburetor tuning, wiring harness repair. Installation: Component installation and removal for all major systems. Technical Depth Diagnostic Capabilities: Detailed diagnostic procedures, including symptom analysis and step-by-step troubleshooting guides. Rebuild Instructions: Comprehensive instructions for complete engine and transmission rebuilds, with exploded diagrams. Diagrams Illustrations: Hundreds of detailed photos and exploded diagrams for clear visual guidance. 📊 Manual Specifications File Format File Type: PDF Compatibility: Windows and MAC computers Print Quality Printable: Yes, single pages or entire manual printable. Binding Type Binding: N/A (Digital Download) Paper Type Paper Quality: N/A (Digital Download) Licensing Usage Rights: Lifetime use, unlimited devices, no expiry, no renewal fees. ⚙️ Engine Specifications Primary Engine Engine Family: Harley-Davidson Evolution (Evo) Big Twin Engine Configuration: Air-cooled, 45-degree V-twin Displacement: Typically 80 cubic inches (1337cc) for this era, though some earlier or later variants might exist. Performance Horsepower Estimate: Approximately 55-65 HP (varies with tuning and specific model year) Torque Estimate: Approximately 65-75 lb-ft (varies with tuning and specific model year) Fuel System Carburetor Type: Keihin Butterfly Carburetor (e.g., CV 40mm) Fuel Requirement: Unleaded gasoline, octane rating typically 91 or higher. Ignition System Ignition Type: Electronic Ignition (CDI or similar breakerless system) Lubrication System Oil Type: Harley-Davidson recommended motorcycle oil (e.g., 20W-50 V-Twin specific) or equivalent. 🔧 Transmission Standard Transmission Type: 5-speed constant mesh, manual. Primary Drive: Primary chain drive. Final Drive: Belt drive. Features Clutch Type: Wet, multi-plate. Transmission Fluid: Harley-Davidson Primary Chaincase Lubricant (or equivalent 75W-90 gear oil). 📐 Dimensions Exterior Wheelbase: Approximately 62 inches (varies slightly by specific model) Weights Dry Weight: Approximately 550-600 lbs (varies by model and equipment) Gross Vehicle Weight Rating: Typically around 900-950 lbs. 🛡️ Safety Features Ratings Crash Test Information: Motorcycles of this era typically do not have standardized crash test ratings like automobiles. Active Features Braking System: Hydraulic disc brakes front and rear. Front: Dual discs on some models, single disc on others. Rear: Single disc. Passive Features Lighting: Halogen headlight, taillight, brake light, turn signals. 💡 Technology Features Infotainment Audio System: Typically no factory-installed infotainment system on base models; aftermarket options are common. Driver Assistance ABS: Anti-lock Braking System (ABS) was not a standard or widely available option during this period. Connectivity Bluetooth Usb: No factory Bluetooth or USB connectivity. Instruments Gauge Cluster: Analog speedometer, tachometer (optional or standard depending on trim), fuel gauge, oil pressure light, neutral indicator, turn signal indicators. 🔧 Maintenance Service Intervals Engine Oil Change: Typically every 2,500 - 5,000 miles or annually, depending on usage and manufacturer recommendations within the manual. Transmission Oil Change: Every 5,000 - 10,000 miles or annually. Spark Plug Replacement: Approximately every 5,000 - 10,000 miles. Belt Drive Inspection Tensioning: Inspect at 1,000 miles, then every 5,000 miles; tension adjustment as needed. Fluid Specifications Engine Oil Viscosity: 20W-50 Motorcycle Oil (API SG or higher). Primary Chaincase Oil: Harley-Davidson Primary Chaincase Lubricant or SAE 75W-90 GL-4 Gear Oil. Brake Fluid: DOT 4 Hydraulic Brake Fluid (for hydraulic systems). Known Issues Evolution Engine Vibration: Early Evo engines can experience higher vibration levels, addressed through improved mounting and balance in later years. Carburetor Tuning: Keihin CV carburetor may require periodic tuning or adjustment for optimal performance and fuel economy. Oil...