🏷️ Basic Information

Make:

Harley Davidson

Model:

Dyna

Year:

2004

Model Code:

FXD series (specific model codes like FXDI, FXDC, FXDWG would be detailed within the manual)

👋 Introduction

Market Position:

Essential tool for owners and independent repair shops seeking to maintain and repair their 2004 Harley Davidson Dyna motorcycles with dealership-level accuracy.

Competitive Analysis:

Directly mirrors the official documentation used by authorized Harley Davidson dealerships, offering superior accuracy and detail compared to aftermarket generic manuals.

Key Features:

Detailed step-by-step instructions, extensive illustrations, wiring diagrams, troubleshooting guides, and accurate specifications.

📋 Manual Details

Coverage Scope:

Comprehensive factory repair and workshop procedures for the 2004 Harley Davidson Dyna models.

Page Count:

Detailed page count not provided in product description, but typical factory manuals are extensive, often exceeding 500 pages.

Manual Type:

Factory Repair Workshop Manual

Language:

English

Format:

Likely printed book format, consistent with dealer usage. Digital (PDF) versions are also common for this era.

📖 Manual Coverage

Engine:

Engine assembly, disassembly, internal components, fuel delivery, ignition, cooling (air-cooled), lubrication.

Transmission:

Gearbox disassembly, assembly, clutch operation, shifting mechanisms, lubrication.

Chassis:

Frame inspection and repair, suspension (front forks, rear shocks), steering, wheel bearings, spokes.

Brakes:

Brake system diagnosis, caliper service, master cylinder service, brake fluid replacement, bleeding procedures.

Electrical:

Wiring diagrams, component testing (battery, alternator, starter, lights, ignition switch), fuse and relay identification, accessory wiring.

Fuel System:

Carburetor or fuel injection system service (depending on specific Dyna model), fuel pump, fuel lines, fuel tank.

Exhaust System:

Exhaust system removal, installation, and inspection for leaks.

Bodywork And Trim:

Fender removal/installation, fuel tank removal/installation, seat, handlebars, controls, instrumentation.

Maintenance:

Routine service procedures, oil changes, filter replacements, spark plug replacement, chain/belt adjustment, tire pressure checks.

Troubleshooting:

Diagnostic flowcharts for common symptoms, identification of potential causes and corrective actions.

Repair:

Step-by-step instructions for component removal, overhaul, and reinstallation.

Rebuilds:

Detailed procedures for engine and transmission rebuilds.

Diagnostics:

Guidance on identifying and resolving mechanical and electrical issues.

Depth:

Factory-level diagnostic and repair procedures, suitable for dealership technicians and advanced DIY enthusiasts. Covers from basic maintenance to complete engine rebuilds.

📊 Manual Specifications

File Format:

Assumed to be a physical publication. If digital, typically PDF with searchable text and high-resolution images.

Print Quality:

High quality printing with clear, legible text and detailed, accurate illustrations and diagrams.

Binding Type:

Typically a robust binding suitable for workshop use, such as a spiral-bound or saddle-stitched format to lay flat.

Paper Type:

Durable, high-quality paper stock designed to withstand grease and frequent handling in a workshop environment.

⚙️ Engine Specifications

Engine Type:

Harley Davidson Twin Cam 88 (V-Twin, air-cooled, pushrod OHV)

Displacement:

88 cubic inches (1450 cc)

Bore X Stroke:

3.75 in x 4.00 in (95.25 mm x 101.6 mm)

Compression Ratio:

Approximately 8.8:1 to 9.2:1 (depending on specific model variant)

Horsepower:

Approximately 65-70 HP (at crankshaft, may vary slightly by model)

Torque:

Approximately 75-80 ft-lbs (at crankshaft, may vary slightly by model)

Fuel Delivery:

Carbureted (Keihin CV) or Electronic Fuel Injection (EFI) depending on specific Dyna model (e.g., FXDI).

Fuel Type:

Unleaded gasoline, 91 octane (R+M)/2 or higher recommended.

Ignition System:

Electronic ignition with single fire coil.

Oil Type:

Harley Davidson 20W-50 SYN3 or equivalent motorcycle-specific synthetic oil.

Oil Capacity:

Approximately 3.5 US quarts (3.3 Liters) with filter change.

Spark Plug Type:

Harley Davidson recommends specific plugs; typically NGK or H-D equivalents, e.g., NGK DCPR8E or equivalent.

🔧 Transmission

Transmission Type:

5-speed constant mesh, helical gear, left-side drive.

Optional Transmission:

N/A for 2004 Dyna models; 5-speed was standard.

Clutch Type:

Wet, multi-plate, diaphragm spring.

Transmission Fluid Type:

Harley Davidson Formula+ Transmission & Primary Chaincase Lubricant or equivalent.

Transmission Fluid Capacity:

Approximately 24 US fluid ounces (0.71 Liters).

📐 Dimensions

Length:

Varies by specific Dyna model (e.g., Dyna Super Glide Custom FXDC around 92.3 inches).

Width:

Varies by specific Dyna model (handlebar width).

Height:

Varies by specific Dyna model (seat height, handlebar height).

Dry Weight:

Varies by specific Dyna model (e.g., Dyna Super Glide FXD around 635 lbs).

Gross Vehicle Weight Rating:

Approximately 1030 lbs (467 kg).

Fuel Capacity:

Approximately 4.9 US gallons (18.5 Liters).

🛡️ Safety Features

Safety Ratings:

Motorcycles of this era do not typically receive formal crash test ratings like cars. Safety is achieved through design and rider skill.

Active Safety:

Effective hydraulic disc brakes front and rear, responsive steering, stable chassis geometry.

Passive Safety:

Robust frame construction, rider controls designed for secure operation, lighting systems for visibility.

💡 Technology Features

Infotainment System:

Base models typically featured analog gauges and no integrated infotainment system. Optional accessories like aftermarket radios or speakers could be fitted.

Driver Assistance:

No electronic driver assistance features common in modern vehicles (e.g., ABS was not standard, stability control, traction control).

Connectivity:

No integrated Bluetooth or smartphone connectivity. Communication systems would be aftermarket additions.

🔧 Maintenance

Initial Service:

Typically at 1,000 miles (1,600 km) for break-in service, including oil change, filter replacement, and thorough inspection.

Subsequent Service:

Generally every 5,000 miles (8,000 km) or annually, whichever comes first, for routine maintenance.

Major Service Intervals:

Includes valve adjustments, spark plug replacement, and belt/chain inspections at specific mileage intervals (e.g., 10,000 or 20,000 miles).

Engine Oil:

Harley Davidson 20W-50 SYN3 or equivalent motorcycle synthetic.

Transmission Fluid:

Harley Davidson Formula+ Transmission & Primary Chaincase Lubricant.

Brake Fluid:

DOT 4 recommended for hydraulic brake systems.

Primary Chain Lubricant:

Harley Davidson Formula+ Transmission & Primary Chaincase Lubricant.

Common Issues:

Potential for primary drive chain tensioner wear (especially early Twin Cam), cam chain tensioner issues (later Twin Cam models were improved), some carburation adjustments may be needed, potential for oil leaks at gaskets/seals over time.

Preventative Maintenance:

Regular oil changes, proper torque on critical fasteners, timely replacement of wear items (e.g., brake pads, tires), and keeping up with Harley-Davidson service bulletins are crucial.

📚 Vehicle History

Brand Heritage:

Harley Davidson is an iconic American motorcycle manufacturer with a rich history dating back to 1903, known for its V-twin engines and cruiser-style motorcycles.

Model Evolution:

The Dyna line, introduced in 1991, offered a blend of classic styling with modern performance, evolving over the years with engine upgrades (like the Twin Cam 88) and chassis improvements. The 2004 models represent a significant iteration before further refinements in subsequent years.

Production Years For Twin Cam 88:

1999-2006 (used in various Harley Davidson models, including Dyna).

🏆 Awards & Recognition

Brand Awards:

Harley Davidson motorcycles, including the Dyna models, are consistently recognized for their styling, sound, and rider experience, often earning accolades in rider polls and industry reviews for their classic appeal and customization potential.