🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLSTCI Heritage Softail Classic ST EFI

Year:

2004

Family:

Softail

Chassis Code:

FLSTCI

👋 Introduction

Segment:

Cruiser/Touring Motorcycle

Description:

The Harley-Davidson FLSTCI Heritage Softail Classic ST EFI represents a blend of classic styling and modern fuel-injected performance, targeted at riders who appreciate traditional Harley aesthetics with the convenience and reliability of EFI.

Competitors:

Competed with other large-displacement V-twin cruisers from brands like Indian, Victory (later), and Japanese manufacturers offering similar styling and cruiser characteristics.

Styling:

Iconic cruiser design with classic lines, chrome accents, a large detachable windshield, and leather saddlebags.

Engine Platform:

Harley-Davidson's renowned Twin Cam 88 engine, known for its torque and distinctive V-twin character.

Fuel Delivery:

Electronic Fuel Injection (EFI) for improved throttle response, fuel economy, and easier cold starts compared to carburetors.

Suspension Type:

Softail design with hidden rear shock absorbers, mimicking the look of a hardtail frame while providing modern suspension comfort.

📋 Manual Details

Coverage:

Complete official factory service repair

Page Count:

Hundreds of pages (specific count not provided, but implied to be comprehensive)

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine System:

Detailed diagnosis, repair, and overhaul of the Twin Cam 88 EFI engine, including fuel injection, ignition, lubrication, and cooling systems.

Transmission System:

Comprehensive repair and maintenance procedures for the 5-speed Cruise Drive transmission, including clutch, gearbox, and final drive components.

Chassis System:

Coverage for Softail frame, swingarm, suspension (front forks and rear shocks), steering, and wheel bearings.

Electrical System:

In-depth troubleshooting and repair of the electrical system, including battery, charging system, ignition, lighting, instruments, and accessories.

Braking System:

Detailed procedures for front and rear brake systems, including master cylinders, calipers, rotors, and hydraulic lines.

Fuel System:

Specific instructions for the Electronic Fuel Injection (EFI) system, including fuel pump, injectors, sensors, and ECM.

Exhaust System:

Maintenance and troubleshooting for the exhaust system, including mufflers and heat shields.

Bodywork And Trim:

Procedures for removing, installing, and servicing body panels, fenders, fuel tank, seat, and trim components.

Routine Maintenance:

Oil changes, filter replacements, spark plug service, drive belt inspection and adjustment, brake fluid flush, and general lubrication.

Troubleshooting Diagnostics:

Systematic diagnostic charts, fault code interpretations, and step-by-step troubleshooting guides for common and uncommon issues.

Engine Repair:

Detailed disassembly, inspection, measurement, and reassembly procedures for all engine components, including top-end and bottom-end overhauls.

Transmission Repair:

Clutch adjustment, gear set removal and installation, seal replacement, and transmission fluid service.

Electrical Diagnostics:

Wiring diagrams, connector pinouts, component testing procedures, and troubleshooting of electrical faults.

Brake Service:

Bleeding procedures, pad replacement, caliper overhaul, and hydraulic system repairs.

Suspension Service:

Fork seal replacement, fork oil changes, shock absorber servicing, and wheel alignment checks.

Efi System Calibration:

Information on EFI sensor testing and potential adjustments (though advanced tuning may require specialized tools).

Wheel And Tire Service:

Tire mounting and balancing, wheel bearing replacement, and spoke adjustment.

Depth:

Comprehensive, suitable for professional technicians and advanced DIY enthusiasts. Covers everything from basic maintenance to complete engine and transmission rebuilds.

📊 Manual Specifications

File Type:

PDF

Searchability:

Typically searchable text within the PDF for quick access to information.

Quality:

High-resolution, designed for clarity and readability when printed.

Binding:

N/A (Digital PDF download)

Paper Type:

N/A (Digital PDF download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, Twin Cam 88 V-Twin

Displacement:

1450 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

Valve Train:

Overhead valve (OHV), 2 valves per cylinder

Power Output:

Approximately 65-70 HP (specific rating may vary by tuning and region)

Torque Output:

Approximately 75-80 lb-ft (specific rating may vary by tuning and region)

Fuel Type:

Unleaded gasoline

Fuel Delivery System:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Pump Type:

Electric

Idle Speed Control:

Integrated into EFI system

🔧 Transmission

Transmission Type:

5-speed Constant Mesh

Clutch Type:

Wet, multi-plate

Final Drive:

Belt Drive

Gear Ratios:

Detailed gear ratios available in manual (e.g., 1st: 9.312, 2nd: 6.455, 3rd: 4.744, 4th: 3.800, 5th: 3.151)

📐 Dimensions

Wheelbase:

Approximately 64.5 inches (1638 mm)

Length:

Approximately 93.5 inches (2375 mm)

Seat Height:

Approximately 26.5 inches (673 mm) (unladen)

Dry Weight:

Approximately 666 lbs (302 kg)

Gross Vehicle Weight Rating:

Approximately 1060 lbs (481 kg)

Saddlebag Capacity:

Leather saddlebags with significant capacity for touring.

🛡️ Safety Features

Safety Certification:

Not applicable for motorcycles in the same way as automobiles; compliance with relevant federal motor vehicle safety standards (FMVSS) for motorcycles.

Brakes:

Dual-piston front and rear disc brakes for reliable stopping power.

Lighting:

Halogen headlight, taillight, brake light, and turn signals for visibility.

Frame Construction:

Robust steel frame and swingarm designed for stability and rider comfort.

Tire Design:

Cruiser-style tires optimized for highway stability and comfort.

💡 Technology Features

Audio System:

Some models featured an optional AM/FM radio with CD player, often integrated into the fairing or handlebar controls.

Instrumentation:

Analog speedometer, tachometer, fuel gauge, and indicator lights. Some models may have an LCD display for odometer and trip meter.

Cruise Control:

While not standard on all FLSTCI models, cruise control was an available option or aftermarket addition, contributing to rider comfort on long journeys.

Diagnostics:

The EFI system incorporates diagnostic capabilities, accessible via specific Harley-Davidson diagnostic tools, which this manual will reference for troubleshooting.

🔧 Maintenance

First Service:

Typically at 1,000 miles (1,600 km) or 6 months, whichever comes first. Includes oil and filter change, primary chain adjustment, and general inspection.

Subsequent Oil Change:

Every 5,000 miles (8,000 km) or 12 months, whichever comes first. Includes oil and filter change, and inspection of various components.

Drive Belt Inspection:

Inspect and adjust drive belt tension every 10,000 miles (16,000 km) or as needed based on audible signs or performance.

Brake Fluid Flush:

Recommended every 2 years or as per manual, due to hygroscopic nature of brake fluid.

Spark Plug Replacement:

Refer to manual, typically around 10,000-20,000 miles depending on plug type and condition.

Engine Oil Type:

Harley-Davidson recommends their own SAE 20W-50 Synthetic Motorcycle Oil or an equivalent API CI-4 rated synthetic oil for this engine.

Engine Oil Capacity:

Approximately 3 quarts (2.84 liters) with filter change.

Primary Chain Case Oil Type:

Harley-Davidson Primary Chain Lubricant, or an equivalent SAE 80W-90 gear oil.

Primary Chain Case Oil Capacity:

Approximately 20-24 US fluid ounces (0.59-0.71 liters).

Transmission Oil Type:

Harley-Davidson Transmission Oil, or an equivalent SAE 75W-140 synthetic gear oil.

Transmission Oil Capacity:

Approximately 28 US fluid ounces (0.83 liters).

Brake Fluid Type:

DOT 4 brake fluid.

Cam Chain Tensioner:

Early Twin Cam 88 engines (pre-2007) were known for wear on the cam chain tensioners, which could lead to engine damage if not addressed. The manual will detail inspection and replacement procedures.

Oil Leaks:

Common areas for potential oil leaks include primary and transmission seals, and rocker box gaskets. The manual provides seal replacement procedures.

Efi Idle Control:

Occasional idle issues or stalling can occur due to sensor faults or throttle body buildup. The manual aids in diagnosing these problems.

Suspension Seals:

Fork seals are a common wear item and may require periodic replacement. The manual details the fork disassembly and seal replacement process.

📚 Vehicle History

Brand Legacy:

Harley-Davidson, established in 1903, is synonymous with American motorcycle culture, freedom, and iconic V-twin engines.

Softail Lineage:

The Softail platform, introduced in 1984, revolutionized the cruiser market by replicating the hardtail look with concealed rear suspension, offering both classic aesthetics and modern rideability.

Heritage Softail:

The Heritage Softail models consistently offered a blend of vintage styling cues, comfortable ergonomics, and touring amenities, making them enduringly popular.

Model Variant:

The FLSTCI designation specifically refers to the Classic model with EFI for the 2004 model year.

Engine Introduction:

The Twin Cam 88 engine was introduced in 1999, becoming the primary engine for Harley-Davidson's Big Twin models, including the Softail line, and was known for its increased displacement and improved performance over the Evolution engine.

🏆 Awards & Recognition

Motorcycle Type:

Harley-Davidson motorcycles, including the Softail line, are consistently recognized for their iconic styling, build quality, and association with American culture and freedom.

Customer Satisfaction:

Harley-Davidson generally scores well in customer satisfaction surveys, particularly for brand loyalty and owner pride.

Manual Quality:

The 'Factory Service Repair Manual' designation indicates that this document is the official and authoritative guide produced by the manufacturer, ensuring accuracy and completeness.