🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLSTC Heritage Softail Classic ST

Year:

2004

Model Code:

FLSTC

Engine Variant:

Twin Cam 88B (1450cc)

👋 Introduction

Positioning:

The FLSTC Heritage Softail Classic ST represents Harley-Davidson's commitment to retro styling and classic cruiser comfort, appealing to riders who appreciate timeless design and touring capability.

Competitors:

Competes with other large-displacement cruisers from brands like Indian Motorcycle, and some premium offerings from Japanese manufacturers in the classic styling segment.

Styling:

Chrome detailing, whitewall tires, laced wheels, leather-look saddlebags, large FL-style windshield, and classic teardrop fuel tank contribute to its iconic retro aesthetic.

Comfort:

Comfortable seating position, floorboards, and effective windshield provide excellent rider comfort for long-distance touring.

Platform:

Built on the robust Harley-Davidson Softail frame, offering a balanced ride and distinctive Big Twin styling.

📋 Manual Details

Manual Type:

Workshop Service Manual (WSM)

Language:

English

Format:

PDF Download

Page Count:

Comprehensive (exact count not specified but typical WSMs exceed 500 pages)

📖 Manual Coverage

Engine:

Complete disassembly, assembly, diagnosis, tuning, and repair of the Twin Cam 88B engine and its components.

Transmission:

Disassembly, assembly, maintenance, and repair of the 5-speed Cruise Drive transmission.

Drivetrain:

Primary drive, clutch, drive belt, and final drive belt maintenance and adjustment.

Fuel System:

Fuel injection (EFI) system diagnosis and repair, fuel pump, fuel filter, and carburetor (if applicable to specific sub-models or earlier reference) troubleshooting.

Ignition System:

Ignition module, spark plugs, ignition coils, and troubleshooting.

Electrical System:

Wiring diagrams, charging system (alternator, regulator), starting system (starter motor, solenoid), lighting system, instrumentation, and accessory wiring.

Braking System:

Hydraulic brake system maintenance, bleeding, caliper and master cylinder repair, and brake pad replacement.

Suspension:

Front fork (Show Classic 41mm Telescopic) and rear shock absorber maintenance, adjustment, and replacement.

Frame And Bodywork:

Frame inspection, fairing and fender removal/installation, seat, saddlebags, and all body component servicing.

Wheels And Tires:

Wheel bearing maintenance, tire installation and balancing, and spoke wheel care.

Maintenance:

Scheduled maintenance, oil changes, filter replacements, chain/belt adjustments, brake fluid changes, and general inspection procedures.

Troubleshooting:

Detailed diagnostic flowcharts and symptom-based troubleshooting for engine performance, electrical faults, and mechanical issues.

Repair:

Step-by-step instructions for component disassembly, repair, and reassembly for all major vehicle systems.

Diagnostics:

Diagnostic codes (DTCs), sensor testing, and component testing procedures.

Specifications:

Torque specifications for all fasteners, fluid capacities, electrical specifications, and component tolerances.

Depth:

Comprehensive, covering everything from basic fluid checks and adjustments to complete engine and transmission overhauls and advanced electrical diagnostics.

📊 Manual Specifications

File Type:

PDF

Searchability:

Likely text-searchable PDF for easy information retrieval.

Quality:

High-resolution, suitable for printing individual pages or the entire manual.

Binding:

N/A (Digital download)

Paper:

N/A (Digital download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-Twin, Twin Cam 88B

Displacement:

1450cc (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 valves (OHV), 2 valves per cylinder, pushrod actuated.

Horsepower:

Approx. 65-70 HP (specifications vary slightly by region and tuning)

Torque:

Approx. 86-88 ft-lbs @ 3200 RPM

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, minimum 91 octane (Research Octane Number)

Oil Capacity:

Approx. 4 quarts (3.8 liters)

Oil Type:

Harley-Davidson SYN3 Synthetic Motorcycle Oil or equivalent SAE 20W-50 API CI-4 Plus.

🔧 Transmission

Transmission Type:

5-speed constant mesh, sequential

Gear Ratios:

1st: 10.110, 2nd: 6.917, 3rd: 4.912, 4th: 3.584, 5th: 2.929

Primary Drive:

In-line, chain drive, 34/46 ratio

Final Drive:

Belt drive, 32/66 ratio

Clutch:

Wet, multi-plate, hydraulically actuated

Transmission Oil Capacity:

Approx. 2.8 quarts (2.65 liters)

Transmission Oil Type:

Harley-Davidson Formula+ Transmission Lubricant or equivalent SAE 85W-140 API GL-5

📐 Dimensions

Length:

9.1 ft (2.77 m)

Width:

3.1 ft (0.95 m)

Height:

4.7 ft (1.43 m) (to windshield top)

Wheelbase:

64.2 in. (1631 mm)

Ground Clearance:

5.1 in. (130 mm)

Dry Weight:

636 lbs (288.5 kg)

Gross Vehicle Weight Rating:

1050 lbs (476 kg)

Fuel Capacity:

4.9 US gal (18.5 L)

Saddlebag Capacity:

Approx. 1.5 cu ft per bag

🛡️ Safety Features

Crash Safety:

Motorcycles are not subject to the same formal crash test ratings as automobiles. Safety is primarily based on rider skill and defensive riding practices, augmented by vehicle features.

Braking:

Dual disc front brakes, single disc rear brake with hydraulic actuation. ABS was optional on some 2004 models, but not standard on the FLSTC.

Lighting:

Halogen headlamp, auxiliary passing lamps, LED tail light, and amber front/rear turn signals.

Frame Design:

Steel tube frame provides a robust foundation.

Windshield:

Provides rider protection from wind and road debris.

💡 Technology Features

Audio System:

Optional accessory radio and speaker systems were available, often integrated into the fairing or handlebars.

Cruise Control:

Cruise control was an optional feature on many FLSTC models of this era, offering enhanced long-distance comfort.

ABS:

Anti-lock Braking System (ABS) was an optional feature, not standard.

Connectivity Features:

Limited by modern standards. Primarily focused on mechanical reliability and rider experience rather than digital integration. Accessory connectivity (e.g., GPS mounts) would be supplemental.

🔧 Maintenance

First Service:

1,000 miles (1,600 km) or 6 months, whichever comes first.

Subsequent Service:

Every 5,000 miles (8,000 km) or 12 months thereafter, with more comprehensive checks at 10,000, 20,000, etc.

Oil Change Interval:

Every 5,000 miles (8,000 km) or 12 months. Inspect every 2,500 miles.

Drive Belt Inspection:

Inspect tension and condition every 5,000 miles.

Brake Fluid Flush:

Recommended every 2 years or as per manual. Inspect every 10,000 miles.

Engine Oil Viscosity:

SAE 20W-50

Transmission Oil Viscosity:

SAE 85W-140

Primary Chain Case Oil:

Harley-Davidson primary fluid or equivalent SAE 85W-140 API GL-5

Brake Fluid Type:

DOT 4 hydraulic fluid

Cam Chain Tensioners:

Early Twin Cam engines (pre-2007) had plastic cam chain tensioner shoes that could wear out, leading to potential engine damage. This is a critical inspection point.

Crankshaft Position Sensor:

Can sometimes fail, leading to starting issues or stalling.

Regulator Rectifier:

Early models could experience issues with the charging system's regulator/rectifier.

📚 Vehicle History

Legacy:

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

Heritage Lineage:

The Heritage Softail line draws inspiration from classic Harley-Davidson motorcycles, particularly the Panhead and Shovelhead era styling, adapted to modern engineering.

Model Introduction:

The Softail platform itself was introduced in 1984. The Heritage Softail Classic (FLSTC) variant, emphasizing retro styling, has been a consistent model in the lineup since its introduction.

Manufacturing Location:

Typically manufactured at Harley-Davidson's facilities in Milwaukee, Wisconsin, or York, Pennsylvania, USA.

🏆 Awards & Recognition

Industry Standing:

Harley-Davidson motorcycles, particularly the Softail line, consistently rank high in customer satisfaction and brand loyalty. Specific awards for the 2004 FLSTC are less common than general brand accolades.