🏷️ Basic Information Identification Make: Harley-Davidson Model: Duo Glide Year: 1958-1959 👋 Introduction Market Position Target Audience: Professional motorcycle technicians, experienced DIY enthusiasts, and owners seeking in-depth knowledge for their vintage Harley-Davidson Duo Glide. Historical Significance: The Duo Glide was Harley-Davidson's premier large touring motorcycle, offering comfort and capability for long-distance riding, setting the stage for future Electra Glide models. Competitive Analysis Value Proposition: Provides factory-level repair and maintenance information, often superior to or supplementing original manuals, with the convenience of instant digital access. Key Features Content Advantage: Equips users with the same knowledge as factory-trained technicians, enabling informed decision-making for maintenance and repairs. Accessibility: Instant download allows for immediate access to critical repair information, crucial for timely servicing. 📋 Manual Details Coverage Areas Manual Type: Repair Service Manual / Workshop Manual Language: English Format: PDF (Downloadable) File Specifications: Full Printable, Zoomable Delivery Method: Instant Download Required Software: Adobe PDF Reader, WinZip Compatibility: All Versions of Windows & Mac 📖 Manual Coverage Systems Covered Engine And Powertrain: Engine overhaul, carburetor tuning, ignition system diagnosis, exhaust system repair, clutch operation, transmission servicing (if applicable to specific Duo Glide variants of these years). Chassis And Suspension: Front fork (hydra-glide) maintenance and repair, rear suspension systems, frame inspection and repair, wheel and tire servicing, brake system overhaul (drum brakes), steering head bearing adjustment. Electrical System: Lighting circuits, battery maintenance and charging system diagnosis, generator or alternator (depending on specific year variant) testing, wiring diagrams, ignition switch and controls. Bodywork And Trim: Fender removal and installation, fuel tank servicing, seat assembly, handlebar and control adjustments, chrome and trim component care and repair. Fuel System: Fuel tank servicing, fuel line inspection, carburetor cleaning, adjustment, and rebuilding. Exhaust System: Muffler and pipe inspection, clamp tightening, and potential replacement procedures. Brakes: Drum brake service, adjustment, and component replacement (shoes, springs, actuating mechanisms). Frame And Body: Frame inspection for cracks or damage, mounting hardware checks, fairing/tank mounting if applicable. Procedures Included Maintenance: Scheduled maintenance tasks, lubrication points, fluid level checks and replacements, filter changes, general upkeep procedures. Repair And Rebuild: Step-by-step disassembly, cleaning, inspection, reassembly, and adjustment of all major mechanical and electrical components. Troubleshooting: Diagnostic procedures for common performance issues, starting problems, electrical faults, and mechanical noises. Technical Specifications: Critical torque values, clearances, timing settings, fluid capacities, electrical specifications, and dimensional data. Assembly And Disassembly: Detailed instructions for taking apart and putting back together all major components and sub-assemblies. Cleaning And Reinstalling: Guidelines for proper cleaning of parts and correct reinstallation methods. Torque Specifications: Essential torque values for critical fasteners, bolts, and nuts. Illustrations And Diagrams: Includes diagrams, schematics, and photographs to aid in understanding procedures and component identification. Technical Depth Depth Of Coverage: Comprehensive, covering basic to advanced repair and maintenance for professional technicians and skilled DIY mechanics. Diagnostic Level: Advanced diagnostics, including circuit tracing and component testing. Rebuild Level: Full engine and transmission rebuild instructions provided. 📊 Manual Specifications File Format File Type: PDF Print Quality: Full Printable Interactivity: Zoom IN/OUT capability for detailed viewing Searchability: PDF format usually allows for text search, enhancing usability. Binding Type Binding Style: N/A (Digital Download) Physical Form: Digital File ⚙️ Engine Specifications Primary Engine Engine Type: Air-cooled V-twin OHV (Panhead engine variants predominantly) Displacement Cu In: 69.7 (approximate for common 74ci variants) Bore X Stroke: 3.4375 in. x 4.125 in. (approximate for 74ci) Engine Configuration: V-twin, 45-degree cylinder angle Engine Designation: Panhead (PL), often referred to as EL (61ci) or FL (74ci) variants depending on displacement. Performance Horsepower Hp: Varies by specific engine tuning, typically in the range of 50-60 HP for stock configurations of this era. Torque Lb Ft: Varies, but known for strong low-end torque characteristic of Harley-Davidson. Fuel System Carburetor: Typically single Linkert carburetor (e.g., M-series) or later models may feature early Keihin or S&S alternatives in custom builds. Manual will detail correct setup. Fuel Type: Lead-free gasoline, octane rating specified in manual. Engine Features Valve Train: Overhead Valves (OHV), pushrod operated. Cooling System: Air-cooled 🔧 Transmission Standard Type: 4-speed constant mesh manual transmission Clutch Type: Wet multi-plate clutch Features Shift Mechanism: Foot shift lever, potentially with toe-shifter option. Transmission Fluid: Specific SAE viscosity grade specified by Harley-Davidson for this period. 📐 Dimensions Exterior Wheelbase: Approximately 61.5 inches (1562 mm), subject to minor variations. Weights Dry Weight: Approximately 500-550 lbs (227-250 kg), depending on specific configuration and accessories. 💡 Technology Features Infotainment Audio System: N/A (This era of motorcycle predates integrated infotainment systems). 🔧 Maintenance Service Intervals Oil Change Interval: Typically every 1,000 to 2,000 miles, or as specified for the particular oil used. Manual will provide precise recommendations. Spark Plug Replacement: Intervals will vary, but typically checked at oil changes and replaced based on condition or mileage. Fluid Specifications Engine Oil Type: Specific Harley-Davidson recommended viscosity grade and type (e.g., straight weight or multi-viscosity)...