Model Variant:
Dyna (specific sub-models may vary within this range, e.g., Dyna Wide Glide, Dyna Super Glide, etc., though the manual likely covers the core FXDB platform)
Covered Years:
1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
Target Audience:
Harley-Davidson FXDB Dyna owners, independent motorcycle mechanics, and DIY enthusiasts seeking to maintain, repair, or restore their motorcycles.
Value Proposition:
Provides essential technical information to perform a wide range of maintenance and repair tasks, saving owners money and ensuring proper vehicle upkeep. Empowers users with factory-level knowledge.
Manual Competitor Types:
Official Harley-Davidson factory service manuals (often more expensive and less accessible), aftermarket manuals (e.g., Haynes, Clymer - may vary in depth for specific Harley models).
Manual Features:
Detailed exploded views, step-by-step repair instructions, wiring diagrams, troubleshooting charts, torque specifications, and maintenance schedules.
Engine Systems:
Engine assembly, disassembly, top-end rebuild (cylinders, pistons, heads), bottom-end rebuild (crankshaft, connecting rods, bearings), valve train, oil pump, lubrication system, cooling system (if applicable, though most FXDBs of this era are air-cooled)
Transmission Systems:
Gearbox assembly, disassembly, clutch operation, primary drive, secondary drive (belt/chain), shifter mechanism, lubrication
Fuel System:
Carburetor service and tuning (likely Keihin CV), fuel tank, fuel lines, fuel pump (if equipped, though most are gravity feed), fuel filter
Electrical System:
Ignition system (points/electronic depending on specific year/variant), charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting (headlight, taillight, signals), wiring diagrams, battery maintenance, fuses, switches
Chassis Systems:
Frame inspection and repair, front forks (fork seals, oil changes, damping adjustments), rear suspension (shocks, swingarm), steering head bearings, wheel bearings, braking system (master cylinders, calipers, rotors, brake pads, hydraulic lines), control cables (throttle, clutch)
Bodywork And Trim:
Fenders, fuel tank, seat mounting, handlebars, controls, exhaust system, exhaust pipe mounting, minor body panel adjustments
Maintenance Procedures:
Oil changes (engine, primary, transmission), filter replacements, spark plug service, chain/belt tension adjustment, brake fluid flush, tire pressure checks, lubrication points, battery care
Diagnostic Procedures:
Troubleshooting guides for common starting, running, and electrical issues. Symptom-based diagnostics. Carburetor troubleshooting.
Repair Procedures:
Complete engine overhaul, transmission rebuild, brake system repair, fork and shock replacement, electrical component replacement, carburetor rebuilding.
Special Tools And Techniques:
Identification and usage of specialized Harley-Davidson tools required for specific procedures (e.g., flywheels pullers, clutch alignment tools, bearing presses).
Depth Of Coverage:
Comprehensive, covering everything from basic scheduled maintenance and fluid changes to full engine and transmission teardowns and rebuilds. Includes detailed torque specifications, clearances, and assembly sequences.
Digital Format:
PDF (Portable Document Format) - allows for easy searching, printing, and digital storage.
Print Resolution:
High-resolution scans or professionally typeset, ensuring clear diagrams, text, and part illustrations. Searchable text is highly probable for PDF formats.
Physical Format Binding:
If printed: Spiral-bound or perfect-bound to lay flat for easy use in a workshop setting. If digital: N/A
Physical Format Paper:
If printed: Durable, possibly coated paper to withstand workshop conditions and frequent handling.
Engine Family:
Evolution (Evo) V-Twin
Displacement Variants:
Commonly 80 cubic inches (1337cc) for this era of Dyna, though some early models or specific variants might have had different displacements. Manual should cover specific engine codes.
Bore X Stroke:
For 80 cu. in.: 3.498 in. x 4.250 in. (88.85 mm x 107.95 mm)
Compression Ratio:
Typically around 9.0:1 to 9.7:1, depending on specific model and year. Manual will specify.
Cooling Method:
Air-cooled
Cylinder Configuration:
V-twin, 45-degree cylinder angle
Valve Train:
Overhead Valve (OHV), 2 valves per cylinder, pushrod actuated
Horsepower:
Estimated 50-60 HP (at crankshaft, depending on specific tuning and year)
Torque:
Estimated 65-75 lb-ft (at crankshaft, depending on specific tuning and year)
Carburetor Type:
Keihin CV (Constant Velocity) 40mm
Fuel Octane Rating:
91 octane (RVP) or higher recommended
Fuel Tank Capacity:
Typically 3.5 - 5.0 gallons (13.2 - 18.9 liters), depending on the specific FXDB model/tank
Wheelbase:
Varies by specific FXDB model, typically around 62.8 inches (1595 mm)
Seat Height:
Varies by specific FXDB model, typically around 27-28 inches (686-711 mm)
Dry Weight:
Varies by specific FXDB model, typically around 590-620 lbs (268-281 kg)
Gross Vehicle Weight Rating:
Will be specified in the manual, typically around 1000-1100 lbs (454-499 kg)
Crash Test Ratings:
Motorcycles of this era were not subject to standardized crash test ratings like automobiles. Safety features focus on design and rider control.
Braking System:
Dual disc front brakes, single disc rear brake (hydraulic, typically with dual-piston calipers). ABS was not standard on these models.
Suspension Features:
Adjustable front forks (preload, damping) and rear shock absorbers (preload, damping) on many models for optimal handling and stability.
Lighting:
Halogen headlamp, integrated taillight/brake light, turn signals.
Frame Design:
Steel tube frame providing rigidity and stability.
Initial Service:
Typically around 1,000 miles (1600 km) for the first major service, including oil change, filter change, and check of all fasteners and controls.
Routine Maintenance:
Regular oil and filter changes every 2,500-5,000 miles (4000-8000 km) or annually, whichever comes first. Spark plug replacement every 5,000-10,000 miles. Chain/belt lubrication and adjustment as needed.
Transmission Oil Change:
Typically every 10,000 miles (16,000 km) or annually.
Primary Chain Case Oil Change:
Typically every 5,000 miles (8,000 km) or annually.
Engine Oil Type:
Harley-Davidson 20W-50 SYN3 (or equivalent mineral/synthetic oil meeting Harley-Davidson specifications for air-cooled V-twins). Manual will specify precise API service classification.
Engine Oil Capacity:
Approximately 3.0-3.5 US quarts (2.8-3.3 liters) with filter change. Manual will provide exact capacity.
Primary Chain Case Oil Type:
Harley-Davidson primary chain case lubricant or a compatible primary oil (e.g., HD 360 or a motorcycle-specific primary fluid).
Primary Chain Case Oil Capacity:
Approximately 1.0 US quart (0.95 liters). Manual will specify level checking procedure.
Transmission Oil Type:
Harley-Davidson transmission lubricant or a compatible heavy-duty gear oil (e.g., 80W-90 or 75W-140 GL-5). Manual will specify precise viscosity and specification.
Transmission Oil Capacity:
Approximately 1.0 US quart (0.95 liters) or up to fill plug level. Manual will specify exact capacity and procedure.
Brake Fluid Type:
DOT 4 brake fluid (for hydraulic clutch and brakes if applicable, though most FXDB models had cable clutch).
Common Issues Engine:
Slight oil leaks from rocker box gaskets, potential cam bearing wear over time, carburetor tuning sensitivity. Manual will offer troubleshooting for these.
Common Issues Chassis:
Handlebar riser clamp wear, occasional issues with starter solenoid or charging system components. Manual provides diagnostic steps.
Common Issues Electrical:
Corrosion on electrical connectors, loose ground connections, aging wiring harnesses. Manual includes detailed wiring diagrams and troubleshooting.
Brand History:
Harley-Davidson is an iconic American motorcycle manufacturer with a rich history dating back to 1903, renowned for its V-twin engines and cruiser styling.
Dyna Platform Introduction:
The Dyna platform was introduced in 1991 as a replacement for the older Shovelhead and Evolution Sportster-based touring models. It was designed with a more modern chassis and rubber mounting for the engine to reduce vibration.
Fxdb Role:
The FXDB generally represented a more stripped-down, classic custom styling within the Dyna lineup, often featuring a lower profile and minimalist aesthetic.
Production Period:
The specific FXDB model designation within the Dyna family was produced throughout the 1990s and evolved into various configurations before the Dyna line was ultimately discontinued and replaced by the Softail platform in 2018.
Manufacturing Location:
Harley-Davidson motorcycles during this period were primarily manufactured in the United States, often in Milwaukee, Wisconsin, or York, Pennsylvania.
Model Recognition:
The Harley-Davidson Dyna platform, including the FXDB, is widely recognized for its robust V-twin engine, classic styling, and customizability, making it a popular choice for riders and builders.
User Reviews General:
Generally positive for its iconic V-twin rumble, comfortable riding position (depending on specific setup), and solid performance for its class. Manual contributes to maintaining these positive aspects.
Manual Certification:
While not officially 'certified' in a consumer product sense, factory service manuals represent the definitive technical documentation from the manufacturer, adhering to their own internal standards.
