🏷️ Basic Information

Make:

Harley-Davidson

Model:

FXDI Dyna Super Glide EFI

Year:

2004

Platform:

Dyna

Engine Code:

Twin Cam 88 EFI

Model Code Variant:

FXDI

👋 Introduction

Positioning:

The FXDI Dyna Super Glide EFI was a prominent model in Harley-Davidson's Dyna line, appealing to riders seeking a classic cruiser aesthetic with modern fuel injection and a robust V-twin engine.

Competitors:

Competed with models from other American V-twin manufacturers and some Japanese cruisers offering similar displacement and styling cues.

Features:

Electronic Fuel Injection (EFI) for improved throttle response and emissions, Twin Cam 88 engine, classic cruiser styling, comfortable riding position.

📋 Manual Details

Primary Coverage:

Harley-Davidson FXDI Dyna Super Glide EFI 2004 Model Year

Total Pages:

986

Type:

Workshop Service Manual / Repair Manual

Language:

English

Format:

Digital (PDF)

📖 Manual Coverage

Engine:

Complete Engine Assembly, Top End (Cylinders, Heads, Pistons, Valves), Bottom End (Crankcase, Crankshaft, Connecting Rods), Camshafts, Lifters, Pushrods, Ignition System, Fuel Injection System (EFI), Oil Pump, Primary Drive System

Transmission:

5-Speed Gearbox (Trapezoidal Gearcase), Clutch Assembly, Shifting Mechanism, Final Drive (Belt Drive System)

Electrical:

Battery, Charging System (Stator, Regulator/Rectifier), Starting System (Starter Motor, Solenoid), Ignition System (Ignition Module, Coils, Spark Plugs), Lighting System (Headlight, Taillight, Turn Signals, Marker Lights), Instrumentation (Speedometer, Tachometer, Indicators), Fuel Injection Control Module (ECM), Wiring Harnesses, Fuses, Relays, Horn

Chassis:

Frame, Swingarm, Front Forks (Telescopic), Rear Shock Absorbers, Steering Head Bearings, Handlebars, Control Cables, Passenger Footpegs

Brakes:

Front and Rear Hydraulic Disc Brakes, Calipers, Master Cylinders, Brake Lines, Brake Pads, Brake Fluid Specifications

Fuel System:

Fuel Tank, Fuel Pump, Fuel Lines, Fuel Filter, Electronic Fuel Injection (EFI) System, Throttle Body, Injectors, Sensors (MAP, TPS, ECT, IAT)

Bodywork:

Fenders, Fuel Tank Cover, Seat, Side Covers, Battery Box, Air Cleaner Assembly Housing

Maintenance:

Scheduled Maintenance (Oil Changes, Filter Replacements, Spark Plug Replacement, Chain/Belt Adjustment), Lubrication Points, Tire Pressure Checks, Brake Pad Inspection

Repair:

Engine Rebuilding (Top and Bottom End), Transmission Overhaul, Clutch Replacement, Fork Seal Replacement, Brake System Bleeding and Overhaul, Electrical Component Diagnosis and Replacement, Fuel System Cleaning and Repair

Troubleshooting:

Diagnostic Procedures for Engine Performance Issues, Electrical System Faults, Fuel System Problems, Starting and Running Issues, Drivetrain Malfunctions, Symptom-Based Troubleshooting Guides

Diagnostics:

EFI System Diagnostics, DTC (Diagnostic Trouble Code) Retrieval and Interpretation, Sensor Testing Procedures, Wiring Diagram Interpretation

Depth:

Comprehensive. Covers routine maintenance, troubleshooting, detailed component repair, and complete overhaul procedures. Includes torque specifications, clearances, and rebuild procedures for all major systems.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable, enhancing ease of information retrieval.

Quality:

Assumed to be of professional quality for a service manual, suitable for printing.

Binding:

N/A (Digital PDF)

Paper Type:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin, OHV, 4 valves per cylinder (2 per head)

Engine Displacement:

1449 cc (88 cubic inches)

Bore X Stroke:

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

Compression Ratio:

8.8:1 (Typical for Twin Cam 88)

Horsepower:

Approx. 65-70 HP (Estimated, varies by specific tuning and exhaust)

Torque:

Approx. 75-80 lb-ft @ 3200 RPM (Estimated)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI) with single throttle body

Fuel Type:

Unleaded gasoline, minimum 89 octane recommended

Ignition System:

Electronic ignition with single fire capability

Oil System:

Dry sump, oil tank mounted separately

Oil Type:

Harley-Davidson recommended V-Twin Synthetic or similar SAE 20W-50 motorcycle oil

Oil Capacity:

Approx. 3.0 US quarts (2.8 Liters) with filter change

🔧 Transmission

Transmission Type:

5-Speed Manual Constant Mesh

Gear Ratios:

1st: 9.375, 2nd: 6.516, 3rd: 4.714, 4th: 3.750, 5th: 3.150 (Typical for Twin Cam 5-speed)

Primary Drive:

Duplex chain, 1.19:1 ratio

Final Drive:

Belt drive, 32/66 tooth sprockets, 2.06:1 ratio

Clutch:

Wet, multi-plate, diaphragm spring

Transmission Oil Type:

Harley-Davidson Formula + or equivalent SAE 75W-90 GL-5 gear oil

Transmission Oil Capacity:

Approx. 1.0 US quart (0.95 Liters)

📐 Dimensions

Length:

Approx. 90.4 inches (2296 mm)

Width:

Approx. 35.9 inches (912 mm) Handlebar width

Height:

Approx. 50.1 inches (1273 mm)

Seat Height:

Approx. 27.3 inches (693 mm) Laden

Ground Clearance:

Approx. 4.4 inches (112 mm)

Dry Weight:

Approx. 595 lbs (270 kg)

Gross Vehicle Weight Rating Gvwr:

Not specified, but typically significantly higher than dry weight.

Fuel Capacity:

5.0 US gallons (18.9 Liters)

Oil Capacity:

3.0 US quarts (2.8 Liters) Engine Oil

Transmission Oil Capacity:

1.0 US quart (0.95 Liters)

🛡️ Safety Features

Safety Ratings:

Motorcycles are not typically rated by agencies like NHTSA in the same manner as automobiles. Safety is primarily a function of design, rider skill, and adherence to road rules.

Active Safety:

Responsive braking system, stable chassis geometry, effective headlights and taillights.

Passive Safety:

Sturdy frame construction, durable components. Rider responsibility for wearing appropriate safety gear (helmet, protective clothing) is paramount.

💡 Technology Features

Infotainment System:

Basic. Typically featured an analog speedometer and tachometer, with indicator lights. No integrated infotainment or audio systems were standard on this model.

Driver Assistance:

N/A for this model. Driver assistance features are not applicable to this era of motorcycle.

Connectivity:

N/A. No built-in connectivity features.

Engine Management System:

Electronic Control Module (ECM) for managing fuel injection, ignition timing, and diagnostics.

🔧 Maintenance

Oil Change Interval:

Every 5,000 miles or annually, whichever comes first (refer to manual for specific recommendations).

Primary Chain Tensioner Inspection:

Inspect at regular intervals, hydraulic tensioner is a key component for Twin Cam 88.

Spark Plug Replacement:

Recommended every 10,000-15,000 miles, depending on plug type and condition.

Belt Drive Tension Check:

Check belt tension at specified intervals (e.g., every 5,000 miles) and adjust as needed.

Engine Oil Spec:

SAE 20W-50 Motorcycle Oil (Synthetic recommended)

Transmission Oil Spec:

SAE 75W-90 GL-5 Gear Oil

Brake Fluid Spec:

DOT 4 Hydraulic Brake Fluid (for most Harley-Davidson applications of this era)

Known Issues:

Primary chain tensioner wear (especially the older spring-loaded type, though hydraulic was an improvement), cam chain tensioner wear, potential for oil leaks from various seals, voltage regulator failure, and some EFI tuning quirks.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines, custom styling, and strong community culture.

Evolution:

The Dyna line, introduced in 1991, featured a stiffer frame and a larger rubber-mounted engine compared to the previous Sportster and Big Twin models. The Super Glide was a foundational model in this series, evolving through various engine and styling updates.

Production Years:

The Dyna platform was produced from 1991 to 2017, with the FXDI Super Glide EFI being a specific variant within this lineage. The Twin Cam 88 engine was used in many Harley-Davidson models during the early to mid-2000s.

🏆 Awards & Recognition

Awards:

While specific awards for the 2004 FXDI Dyna Super Glide EFI are not widely documented, the Harley-Davidson brand and the Twin Cam platform have received numerous accolades and brand loyalty awards over their production history.