🏷️ Basic Information

Make:

Harley-Davidson

Model:

Heritage Softail

Model Code:

FLSTI

Year:

2006

Vin Prefix:

1HD1

👋 Introduction

Segment:

Cruiser Motorcycle

Target Audience:

Harley-Davidson owners, independent repair shops, motorcycle enthusiasts.

Competitors:

Indian Chief, Victory Kingpin, custom choppers.

Design Philosophy:

Classic styling with modern Harley-Davidson engineering, comfortable touring capability.

Platform:

Softail chassis, offering a rigid frame appearance with hidden suspension.

📋 Manual Details

Engine:

Yes

Transmission:

Yes

Electrical System:

Yes

Chassis:

Yes

Suspension:

Yes

Brakes:

Yes

Fuel System:

Yes

Exhaust System:

Yes

Bodywork:

Yes

Troubleshooting:

Yes

Estimated Pages:

Approx. 700+

Type:

Service Manual / Workshop Repair Manual

Language:

English

Format:

PDF

📖 Manual Coverage

Engine Mechanical:

Engine assembly, disassembly, cylinder heads, cylinders, pistons, crankshaft, connecting rods, camshafts, valve train.

Fuel And Emission Control:

Fuel injection system (EFI), throttle body, fuel pump, fuel filter, injectors, evaporative emission control (EVAP).

Ignition System:

Ignition coil, spark plugs, crank position sensor, ignition module.

Transmission And Drivetrain:

Clutch, primary drive, transmission gears, shift mechanism, final drive (belt drive) maintenance.

Electrical System:

Battery, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), lighting, instruments, switches, relays, fuses, wiring diagrams.

Chassis And Suspension:

Frame, front fork, steering assembly, rear shock absorbers, swingarm, wheel bearings.

Braking System:

Front and rear brake calipers, master cylinders, brake lines, brake pads, brake fluid, bleeding procedures.

Wheels And Tires:

Wheel removal/installation, tire mounting/balancing, tire pressure specifications.

Body And Trim:

Fenders, fuel tank, seat, handlebars, control levers, mirrors, fairings, saddlebags.

Diagnostic Troubleshooting:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting, diagnostic tools.

Routine Maintenance:

Oil changes, filter replacements, chain adjustment (if applicable), lubrication points, inspection points.

Engine Overhaul:

Complete engine rebuild procedures, torque specifications for critical fasteners.

Transmission Repair:

Clutch adjustment and replacement, transmission disassembly and reassembly.

Electrical Diagnostics:

Troubleshooting electrical faults using wiring diagrams, testing components.

Brake Service:

Brake pad replacement, caliper service, master cylinder overhaul, brake fluid flush and bleeding.

Suspension Service:

Fork seal replacement, shock absorber service, steering head bearing adjustment.

Fuel System Cleaning And Repair:

Fuel injector cleaning, fuel pump testing.

Bodywork Repair And Adjustment:

Panel removal and installation, fairing repairs, fender adjustments.

Torque Specifications:

Detailed torque values for all critical engine, chassis, and component fasteners.

Wiring Diagrams:

Comprehensive color-coded wiring diagrams for all electrical systems.

Depth:

Comprehensive (from basic maintenance to complete engine and transmission rebuilds).

📊 Manual Specifications

Quality:

High-resolution, searchable PDF.

Searchability:

Full text search enabled for quick access to information.

Print Quality:

Printable pages for workshop use.

Binding:

Not Applicable (PDF format)

Paper Type:

Not Applicable (PDF format)

⚙️ Engine Specifications

Engine Type:

V-Twin, Four-Stroke

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

Valvetrain:

Overhead Valves (OHV), 2 valves per cylinder

Cooling System:

Air-Cooled

Horsepower:

Approximately 65-70 HP (estimated at crankshaft)

Torque:

Approximately 86 ft-lbs @ 3500 RPM (estimated)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

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

Fuel Tank Capacity:

4.0 gallons (15.1 L)

🔧 Transmission

Type:

5-Speed Cruise Drive

Primary Drive:

Wet, multi-plate clutch, chain drive

Final Drive:

Belt Drive, 32/47 ratio

Clutch Operation:

Hydraulic

📐 Dimensions

Length:

93.7 in (2380 mm)

Width:

38.0 in (965 mm)

Height:

51.2 in (1300 mm)

Wheelbase:

63.5 in (1613 mm)

Ground Clearance:

4.7 in (119 mm)

Dry Weight:

665 lbs (301.6 kg)

Gross Vehicle Weight Rating:

N/A (Typically not specified for motorcycles in the same way as cars)

Front Tire:

130/90-16 67H

Rear Tire:

150/80B16 77H

Wheel Type:

Chrome aluminum alloy

Wheel Size:

16 inch

🛡️ Safety Features

Crash Test Ratings:

Not Applicable (Motorcycles are not subjected to NHTSA crash tests like automobiles).

Braking:

Hydraulic disc brakes front and rear.

Lighting:

Halogen headlight, LED tail light, front and rear turn signals.

Frame Construction:

Steel, rigid frame design with Softail rear suspension.

Ergonomics:

Comfortable riding position for long distances.

💡 Technology Features

Audio System:

Optional accessory audio systems may have been available, but not standard on all FLSTI models. Manual covers wiring and installation if equipped.

Cruise Control:

Not typically standard; often an accessory. Manual would cover installation and troubleshooting if equipped.

Diagnostics:

On-board diagnostics for engine management (EFI) accessible through specific diagnostic ports and tools.

🔧 Maintenance

First Service:

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

Subsequent Oil Changes:

Every 5,000 miles (8,000 km) or 12 months, whichever comes first (engine oil and filter change).

Primary Chain Case Oil:

Every 10,000 miles (16,000 km) or 24 months.

Brake Fluid:

Flush and replace every 2 years, or as needed based on condition.

Drive Belt Tension:

Check and adjust as needed at every 5,000 mile service.

Engine Oil:

Harley-Davidson SYN3 (Synthetic) SAE 20W-50 or equivalent motorcycle-specific oil meeting Harley-Davidson specifications.

Engine Oil Capacity:

3.0 US qt (2.8 L) with filter change.

Primary Chain Case Oil:

Harley-Davidson Formula+ Transmission and Primary Chain Lubricant (or equivalent DOT 4 brake fluid for some older models, consult manual for specific year/model requirements).

Primary Chain Case Oil Capacity:

2.8 US qt (2.6 L).

Transmission Oil:

Harley-Davidson Formula+ Transmission and Primary Chain Lubricant.

Transmission Oil Capacity:

2.8 US qt (2.6 L).

Brake Fluid:

DOT 4

Early Models Primary Drive:

Some earlier models experienced primary drive issues, though 2006 models are generally more robust. Manual covers checks and potential remedies.

Fuel Injector Cleaning:

Periodically may require cleaning or servicing for optimal performance.

Regulator Rectifier:

While not a universal issue for 2006, a failure of the regulator/rectifier can impact the charging system. Manual provides diagnostic steps.

Belt Tensioner:

Proper belt tension is crucial; incorrect tension can lead to premature belt wear. Manual details correct tensioning procedures.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines and classic cruiser styling.

Heritage Softail Line:

The Softail platform was introduced in 1984, featuring hidden rear shock absorbers to emulate the look of a hardtail frame. The Heritage Softail model, introduced in 1986, adds classic styling cues like wire-spoke wheels, wide whitewall tires, and leather-covered saddlebags, drawing inspiration from the classic Hydra-Glide era.

Production Years:

The Heritage Softail FLSTI (Fuel Injected) was produced for multiple years, with the 2006 model representing a refined iteration of this popular cruiser.

Manufacturing Location:

United States

🏆 Awards & Recognition

Model Recognition:

The Harley-Davidson Heritage Softail has consistently been praised for its classic styling, comfort, and ride quality, making it a perennial favorite in the cruiser segment. Specific awards vary by year and publication, but it is a consistently well-regarded model.