Harley Davidson FLSTF Fat Boy ST 2003 Repair Service Manual

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🏷️ Basic Information Identification Make: Harley-Davidson Model: FLSTF Fat Boy ST Year: 2003 Codes Model Code: FLSTF 👋 Introduction Market Position Positioning: Cruiser motorcycle, iconic styling, rider comfort focused Competitive...

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Type: Motorcycle

Vendor:

Sku: 413413

Tags: 2003 FLSTF Fat Boy ST Harley Davidson Misc Motorcycle Motorcycles

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Description

🏷️ Basic Information

Identification

Make:

Harley-Davidson

Model:

FLSTF Fat Boy ST

Year:

Codes

Model Code:

FLSTF

👋 Introduction

Market Position

Positioning:

Cruiser motorcycle, iconic styling, rider comfort focused

Competitive Analysis

Competitors:

Other Harley-Davidson Softail models, Indian Chief, select Japanese cruisers

Key Features

Styling:

Wide front tire, chrome accents, teardrop fuel tank, swept-back handlebars

Engine Variant:

Tribute to the original Fat Boy styling

📋 Manual Details

Coverage Areas

Primary Coverage:

All mechanical and electrical systems

Specific Systems:

Engine, Transmission, Chassis, Electrical, Fuel System, Ignition, Brakes, Suspension, Bodywork, Diagnostics

Page Count

Estimated Pages:

Manual Type

Type:

Workshop Repair Service Manual

Language

Language:

English

Format

Format:

PDF Download

📖 Manual Coverage

Systems Covered

Powertrain:

Engine (Twin Cam 88B), Transmission (5-speed Cruise Drive), Primary Drive, Final Drive

Chassis And Suspension:

Frame, Front Fork (Telescopic), Rear Shocks (Coil-over), Wheels, Tires, Steering System, Brakes (Front and Rear Disc)

Electrical System:

Ignition System, Lighting, Charging System (Alternator, Regulator), Battery, Starter System, Instrumentation, Wiring Diagrams

Procedures Included

Maintenance:

Routine servicing, oil changes, filter replacements, lubrication, spark plug service, brake fluid flush

Repair:

Engine disassembly and assembly, transmission overhaul, suspension repair, brake caliper rebuild, electrical component replacement

Troubleshooting:

Diagnostic procedures for engine performance issues, electrical faults, starting problems, braking irregularities

Technical Depth

Depth:

Comprehensive, covering basic adjustments to full engine rebuilds and complex electrical diagnostics

📊 Manual Specifications

File Format

File Type:

Portable Document Format (PDF)

Searchability:

Fully searchable text content

Printable:

Printable pages for hard copy reference

Print Quality

Image Resolution:

High-resolution for clear diagrams and illustrations

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Primary Engine

Engine Type:

Air-cooled, Twin Cam 88B V-Twin

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

Performance

Horsepower:

Approx. 65-70 hp (at crankshaft, estimated)

Torque:

Approx. 77-80 ft-lbs (at crankshaft, estimated)

Fuel System

Fuel Delivery:

Carbureted (Keihin CV carb)

Fuel Type:

Unleaded gasoline, minimum 87 octane

🔧 Transmission

Standard

Transmission Type:

5-speed Cruise Drive Constant Mesh

Gear Ratios:

1st: 9.59:1, 2nd: 6.65:1, 3rd: 4.94:1, 4th: 3.81:1, 5th: 3.17:1

Optional

Optional Transmission:

N/A for this model year

Features

Clutch:

Clutched, multi-plate, wet

Final Drive:

Belt drive

Transmission Fluid:

Harley-Davidson Syn 3 (20W50) or equivalent, or separate transmission oil for gearcase

📐 Dimensions

Exterior

Length:

93.3 in. (2370 mm)

Width:

38.0 in. (965 mm)

Height:

49.8 in. (1265 mm)

Wheelbase:

63.4 in. (1610 mm)

Ground Clearance:

5.1 in. (130 mm)

Weights

Dry Weight:

650 lbs (295 kg)

Gvwr:

1160 lbs (526 kg)

Fuel Capacity:

4.0 US gallons (15.1 L)

🛡️ Safety Features

Ratings

Safety Ratings:

N/A (Motorcycle, not subject to typical automotive crash test ratings)

Active Features

Braking System:

Hydraulic disc brakes, front and rear

Passive Features

Lighting:

Halogen headlight, LED tail light, front/rear turn signals

💡 Technology Features

Infotainment

Audio System:

Optional accessory audio systems available, not standard equipment

Driver Assistance

Assistance Features:

N/A (No electronic driver assistance systems typically found on this model)

🔧 Maintenance

Service Intervals

Oil Change Interval:

Every 5,000 miles or 6 months (whichever comes first)

Primary Chain Tensioner Check:

Inspect at 10,000-mile intervals, replace if necessary

Spark Plug Replacement:

Every 10,000 miles

Fluid Specifications

Engine Oil Type:

Harley-Davidson 20W50 Syn 3 or equivalent premium V-twin motorcycle oil

Engine Oil Capacity:

3.2 US quarts (3.0 L) with filter change

Transmission Fluid Type:

Harley-Davidson DOT 4 or equivalent DOT 4 brake fluid for clutch, and Harley-Davidson Syn 3 or suitable gear oil for transmission (separate fluid)

Primary Chain Case Oil Type:

Harley-Davidson Primary Chaincase Lubricant or equivalent primary lubricant

Brake Fluid Type:

DOT 4

Known Issues

Common Wear Items:

Clutch plates, belt drive components, fork seals, wheel bearings

Potential Twin Cam Issues:

Primary chain tensioner wear, cam chain tensioner issues (later models addressed this), oil leaks from seals

Carburetor Tuning:

CV carburetor may require periodic adjustment or cleaning for optimal performance

📚 Vehicle History

Brand Heritage

Brand Focus:

American motorcycle manufacturer, known for V-twin engines and cruiser styling

Model Evolution

Fat Boy Origin:

Introduced in 1990, iconic 'muscle cruiser' styling

2003 Updates:

Refinement of the Twin Cam 88B platform, cosmetic updates, potential minor chassis tweaks

Production

Production Location:

USA (Various Harley-Davidson plants)

🏆 Awards & Recognition

Recognitions

Model Accolades:

Consistently recognized for its iconic styling and comfortable ride in the cruiser segment

Ratings

Owner Satisfaction:

Generally high owner satisfaction due to brand loyalty and riding experience