🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLSTF Fat Boy

Year:

2001

Vin Prefix:

1HD1

Engine Family:

Evolution (Big Twin)

👋 Introduction

Positioning:

The Harley-Davidson FLSTF Fat Boy is a cruiser motorcycle known for its iconic styling, solid build, and comfortable riding experience, appealing to riders who value classic aesthetics and a substantial presence on the road.

Competitors:

Competes with other large-displacement cruisers from brands like Indian, Victory (defunct), and custom motorcycle builders focusing on retro styling and V-twin performance.

Styling:

Distinctive 'Fat' styling with wide tires, a teardrop fuel tank, and chrome accents, inspired by post-war customs.

Engine:

Air-cooled, 45-degree V-twin engine (Evolution engine), known for its reliable torque and characteristic Harley-Davidson sound.

Ride Comfort:

Cruiser ergonomics with forward-mounted footpegs, a low seat height, and relaxed handlebar position.

Customization:

Highly customizable platform, a hallmark of Harley-Davidson motorcycles, allowing for extensive personalization.

📋 Manual Details

Engine:

Yes

Transmission:

Yes

Electrical System:

Yes

Chassis Suspension:

Yes

Brakes:

Yes

Fuel System:

Yes

Ignition System:

Yes

Bodywork:

Yes

Maintenance:

Yes

Troubleshooting:

Yes

Diagnostics:

Yes

Wiring Diagrams:

Yes

Total Pages:

917

Type:

Workshop Service Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Complete overhaul procedures for Twin Cam 88 engine, including cylinder head assembly, piston and connecting rod removal/installation, crankshaft service, and timing procedures.

Fuel And Carburetion:

Detailed diagnostics and repair for Keihin CV carburetor, fuel tank removal and installation, fuel pump service, and fuel lines.

Ignition System:

Service and troubleshooting for the electronic ignition system, including crank position sensor, ignition module, and spark plug diagnosis.

Transmission And Drivetrain:

Complete overhaul and repair of the 5-speed Cruise Drive transmission, including clutch service, primary drive inspection, and final drive belt adjustment.

Brake System:

Service and repair for front and rear hydraulic disc brakes, including caliper replacement, brake pad service, fluid bleeding, and master cylinder overhaul.

Electrical System:

Comprehensive coverage of the electrical system, including battery service, charging system (stator and regulator/rectifier), lighting, starter system, and accessory wiring.

Suspension And Steering:

Front fork overhaul, rear shock absorber replacement, swingarm service, and steering head bearing adjustment.

Frame And Bodywork:

Body panel removal and installation, fuel tank mounting, fender service, and frame inspection.

Wheels And Tires:

Wheel bearing service, tire mounting and balancing, and spoke tensioning (where applicable).

Preventive Maintenance:

Detailed schedules for oil changes, filter replacements, chain/belt adjustments, spark plug replacement, and brake system checks.

Troubleshooting Guides:

Step-by-step diagnostic procedures for common electrical and mechanical issues, with symptom-based troubleshooting trees.

Component Rebuilds:

Complete instructions for rebuilding major engine components, transmission, and brake system parts.

Adjustments:

Precise instructions for adjusting clutch, throttle, brakes, and suspension components.

Specifications And Tolerances:

Critical torque specifications, clearances, fluid levels, and wear limits for all serviceable components.

Depth:

Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers detailed disassembly, repair, assembly, and troubleshooting.

📊 Manual Specifications

Format:

PDF

Searchable:

Yes

Printable:

Yes

Quality:

High-resolution scans, clear text and diagrams.

Type:

N/A (Digital Download)

Type:

N/A (Digital Download)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin, Evolution 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

Valvetrain:

Overhead valves (OHV), 2 valves per cylinder

Cooling System:

Air-cooled

Horsepower:

Estimated 65-70 HP (specific figures not officially published by Harley-Davidson for this model year but typical for the 88ci Evolution)

Torque:

Estimated 86-90 ft-lbs @ 3200 RPM (specific figures not officially published but typical for the 88ci Evolution)

Fuel Delivery:

Keihin CV (Constant Velocity) carburetor, 40mm

Fuel Type:

Unleaded gasoline, 91 octane (R+M)/2 minimum

Fuel Tank Capacity:

4.0 U.S. gallons (15.1 L)

Oil Capacity:

3.5 U.S. quarts (3.3 L) (with filter change)

Oil Type:

Harley-Davidson Genuine Motor Oil SAE 20W50 or equivalent

🔧 Transmission

Type:

5-speed constant mesh, sequential manual gearbox

Primary Drive:

Plated roller chain, 34/46 ratio

Final Drive:

Belt, 32/66 ratio

Clutch:

Wet, multi-plate, hydraulically actuated

Transmission Fluid:

Harley-Davidson Formula+ Transmission Lubricant or equivalent (check manual for specific designation)

Transmission Fluid Capacity:

Approximately 1.0 U.S. quart (0.95 L)

📐 Dimensions

Overall Length:

93.9 in. (2385 mm)

Overall Width:

37.2 in. (945 mm)

Overall Height:

48.8 in. (1239.5 mm)

Seat Height Laden:

25.5 in. (648 mm)

Ground Clearance:

5.0 in. (127 mm)

Wheelbase:

63.2 in. (1605 mm)

Dry Weight:

668 lbs (303 kg)

Gross Vehicle Weight Rating:

1050 lbs (476 kg)

Payload Capacity:

382 lbs (173 kg)

Front Tire:

130/90-16 67B

Rear Tire:

150/80-16 71B

Front Wheel:

16-inch chrome laced with solid disc

Rear Wheel:

16-inch chrome laced with solid disc

🛡️ Safety Features

Safety Ratings:

Motorcycles are not typically rated by NHTSA in the same way as cars. Safety is primarily dependent on rider skill and adherence to road safety practices.

Braking System:

Dual-piston front caliper, single-piston rear caliper with hydraulic disc brakes front and rear for reliable stopping power.

Lighting:

Halogen headlight, LED tail light, and standard turn signals for visibility.

Frame Construction:

Robust steel frame designed for stability and durability.

Ergonomics:

Low seat height and accessible controls contribute to rider confidence and control.

💡 Technology Features

Audio System:

Stock models of the 2001 Fat Boy did not typically come with an integrated infotainment or audio system as standard. Many owners opt for aftermarket stereo installations.

Electronic Aids:

Limited electronic aids. The primary electronic system is the ignition and charging system. ABS was not commonly available on this model.

Bluetooth Usb:

N/A - No factory Bluetooth or USB connectivity available for this model year.

🔧 Maintenance

First Service:

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

Subsequent Services:

Every 5,000 miles (8,000 km) or 12 months for regular service (oil, filter, inspection). More comprehensive services at higher intervals as detailed in the manual.

Engine Oil:

Harley-Davidson Genuine Motor Oil SAE 20W50 (or equivalent API CI-4 rated for motorcycles)

Primary Chain Case Fluid:

Harley-Davidson Formula+ Transmission Lubricant (or equivalent)

Brake Fluid:

DOT 4 hydraulic brake fluid (check manual for specific formulation).

Fork Oil:

Harley-Davidson Front Fork Oil (or equivalent, viscosity specified in manual, often around SAE 15W).

Cam Chain Tensioners:

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

Carburetor Tuning:

CV carburetor can require fine-tuning for optimal performance, especially with aftermarket exhaust or air cleaner modifications. The manual provides guidance on adjustment.

Rear Wheel Alignment:

Proper rear wheel alignment is crucial for belt drive longevity and stable handling. The manual covers alignment checks and adjustments.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history of producing V-twin motorcycles synonymous with freedom, rebellion, and the open road.

Fat Boy Introduction:

The Fat Boy model was introduced in 1990 and quickly became one of Harley-Davidson's most recognizable and popular models due to its distinctive styling, a blend of retro and modern.

2001 Updates:

The 2001 model continued the legacy of the Fat Boy, featuring the Twin Cam 88 engine and solid disc wheels, solidifying its place in the Harley-Davidson lineup.

Manufacturing Location:

United States (York, Pennsylvania and Milwaukee, Wisconsin facilities)

🏆 Awards & Recognition

Model Recognition:

The Fat Boy model has consistently received positive reviews for its styling and iconic status, often recognized as a benchmark in the cruiser motorcycle segment.

Customer Satisfaction:

Generally high customer satisfaction ratings due to its classic appeal, reliability of the Evolution engine, and the strong Harley-Davidson ownership community.

Emission Standards:

Compliant with prevailing EPA emission standards for motorcycles of its model year.