🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLSTC Heritage Softail

Year:

2006

Model Code:

FLSTC

👋 Introduction

Positioning:

The FLSTC Heritage Softail is positioned as a cruiser with classic styling, offering a blend of traditional Harley-Davidson aesthetics and modern touring comfort. It appeals to riders seeking iconic looks and a relaxed riding experience.

Competitors:

Competes with other cruiser motorcycles offering retro styling and V-twin engines, such as models from Indian Motorcycle, and select Japanese manufacturers with V-twin offerings.

Styling:

Chrome accents, whitewall tires, classic tank styling, fringed leather saddlebags, large detachable windshield, and a stepped rider seat contribute to its retro appeal.

Engine Type:

Harley-Davidson's air-cooled, 45-degree V-twin Twin Cam 88B engine, known for its distinctive rumble and torque delivery.

Ride Comfort:

Low seat height, comfortable rider ergonomics, and plush suspension contribute to long-distance comfort.

📋 Manual Details

Primary Coverage:

Comprehensive service, repair, and overhaul for the 2006 Harley-Davidson FLSTC Heritage Softail.

Estimated Pages:

Approx. 600-800 pages (typical for this model and era service manual)

Type:

Service Manual / Workshop Repair Manual

Language:

English

Format:

PDF (Digital Download)

📖 Manual Coverage

Engine:

Detailed diagnosis, repair, and overhaul procedures for the Twin Cam 88B engine, including fuel system (carbureted models), ignition, lubrication, cooling (air-cooled), and exhaust.

Transmission:

Service and repair of the 5-speed Cruise Drive transmission, clutch assembly, and primary drive system.

Frame And Suspension:

Front fork (Showabe), rear shock absorbers, swingarm, and frame diagnosis and repair.

Brakes:

Front and rear brake system service, including caliper overhaul, master cylinder, fluid replacement, and bleeding procedures.

Electrical System:

Wiring diagrams, lighting, battery, charging system (stator, regulator/rectifier), starting system, and ignition system troubleshooting and repair.

Bodywork And Fittings:

Body panel removal and installation, seat, handlebars, fenders, fuel tank, and accessory mounting.

Scheduled Maintenance:

Oil changes, filter replacement, spark plug replacement, belt tensioning, brake fluid flushes, and general inspection points.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable).

Repair And Overhaul:

Detailed step-by-step instructions for component disassembly, inspection, repair, and reassembly.

Technical Specifications:

Torque specifications, clearances, fluid capacities, electrical resistance values, and performance data.

Depth:

Comprehensive; covers everything from basic rider maintenance to full engine and transmission rebuilds, suitable for experienced technicians and serious DIY enthusiasts.

📊 Manual Specifications

Format:

PDF

Searchability:

Text-searchable (OCR'd if scanned)

Quality:

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

Binding:

N/A (Digital PDF format)

Paper:

N/A (Digital PDF format)

⚙️ Engine Specifications

Engine Family:

Twin Cam 88B

Displacement:

1450 cc (88 cubic inches)

Configuration:

Air-cooled, 45-degree V-twin

Bore X Stroke:

3.75 in x 4.00 in (95.25 mm x 101.6 mm)

Compression Ratio:

8.8:1

Horsepower:

Approx. 65-70 HP (est. at crank, actual may vary by tuning)

Torque:

Approx. 85-90 ft-lbs (est. at crank, actual may vary by tuning)

Carburetor:

Keihin CV (Constant Velocity) 40 mm (standard for 2006 FLSTC)

Fuel Type:

Unleaded gasoline, minimum 87 octane

System:

Electronic ignition with knock sensor

System:

Dry-sump with internal oil pump

System:

Air-cooled

🔧 Transmission

Type:

5-speed constant mesh Cruise Drive

Primary Drive:

Duplex chain, 34/46 ratio

Final Drive:

Belt, 32/66 ratio

Clutch:

Wet, multi-plate, diaphragm spring

Transmission Fluid:

Harley-Davidson Syn3 Full Synthetic Transmission & Primary Fluid or equivalent meeting Harley-Davidson specifications (e.g., SAE 80W-90 gear oil for primary, specified transmission oil).

📐 Dimensions

Length:

9.3 ft (2.83 m)

Width:

3.2 ft (0.98 m)

Height:

4.8 ft (1.46 m) (to windshield top)

Wheelbase:

64.5 in (1638 mm)

Seat Height:

25.5 in (648 mm) (unladen)

Dry Weight:

Approx. 679 lbs (308 kg)

Gross Vehicle Weight Rating Gvwr:

Approx. 1060 lbs (481 kg)

Weight Capacity:

Approx. 381 lbs (173 kg)

Saddlebag Capacity:

Approx. 2.1 cu ft (0.06 cu m) total for leather saddlebags

🛡️ Safety Features

Crash Test Ratings:

N/A (Motorcycles are not subject to the same standardized crash testing as automobiles).

Braking System:

Dual-action, four-piston front brake calipers and dual-action, two-piston rear brake caliper with integrated hydraulic rear parking brake.

Lighting:

Halogen headlamp, LED tail lamp, and standard front and rear turn signals.

Frame Construction:

Steel cradle frame designed for stability and vibration damping.

Tire Pressure:

Proper tire inflation is critical for safe handling and braking. Manual will specify recommended pressures.

💡 Technology Features

Audio System:

Optional accessory audio systems were available, typically featuring AM/FM radio and cassette/CD player, often integrated into the fairing or handlebar area. Manual may cover accessory installation.

Features:

Limited by modern standards. Primarily focused on mechanical systems. No electronic rider aids like ABS or traction control were standard on this model.

Features:

No integrated smartphone connectivity or advanced electronic features. Focus is on mechanical and electrical systems.

🔧 Maintenance

First Service:

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

Subsequent Service:

Generally every 5,000 miles (8,000 km) or 12 months for routine checks and fluid changes. More in-depth services at higher mileage intervals (e.g., 10,000, 20,000 miles).

Engine Oil:

Harley-Davidson 20W-50 Syn3 Full Synthetic Motorcycle Oil or equivalent meeting Harley-Davidson specifications.

Engine Oil Capacity:

Approx. 4 quarts (3.8 liters) with filter change.

Primary Fluid:

Harley-Davidson Syn3 Full Synthetic Transmission & Primary Fluid or SAE 80W-90 Gear Oil (meeting H-D spec).

Primary Fluid Capacity:

Approx. 2.75 quarts (2.6 liters).

Transmission Fluid:

Harley-Davidson Syn3 Full Synthetic Transmission & Primary Fluid or specified H-D transmission fluid.

Transmission Fluid Capacity:

Approx. 2.3 quarts (2.2 liters).

Brake Fluid:

DOT 4 brake fluid.

Fork Oil:

Harley-Davidson Type E (20W) or Type B (10W) fork oil, or equivalent.

Cam Chain Tensioner Wear:

Hydraulic cam chain tensioners on earlier Twin Cam engines can wear out, leading to noise. Manual will cover inspection and replacement.

Crankcase Breather System:

Proper venting of crankcase pressure is crucial. Manual details system operation and potential issues.

Rear Belt Tension:

Incorrect belt tension can cause premature wear on the belt and sprockets. Manual provides correct adjustment procedures.

Ignition Module Failures:

Early ignition modules could be prone to failure. Manual aids in diagnosing electrical system faults.

Spark Plugs:

Harley-Davidson Part Number 32303-00 (or equivalent NGK DCPR7E) - check manual for definitive part numbers.

Oil Filter:

Harley-Davidson Part Number 63796-77A (or equivalent Screamin' Eagle 26095-05) - check manual for definitive part numbers.

📚 Vehicle History

Heritage:

Harley-Davidson boasts a long and storied history in motorcycle manufacturing, renowned for its V-twin engines, distinctive styling, and rider community. Founded in 1903, it is one of the oldest motorcycle companies in the world.

Heritage Softail Lineage:

The Softail platform, introduced in 1984, mimics the look of a hardtail frame while incorporating hidden rear suspension for improved comfort. The Heritage Softail (FLST) was introduced in 1986, embodying classic styling cues from the 1940s and 1950s, and has been a consistent seller for Harley-Davidson.

Twin Cam 88B:

The Twin Cam 88B engine replaced the Evolution Big Twin in 1999, offering increased displacement and improved performance. The 'B' designation signifies a counter-balanced engine for reduced vibration, making it ideal for Softail models.

Production Era:

The FLSTC Heritage Softail has been in continuous production since its introduction in 1986, with the Twin Cam 88B being the powerplant for models from 1999 through 2006.

Manufacturing Location:

Primarily manufactured at Harley-Davidson's facilities in York, Pennsylvania, and Milwaukee, Wisconsin.

🏆 Awards & Recognition

Model Awards:

While specific awards for the 2006 model year are uncommon, the Heritage Softail line consistently receives positive reviews from motorcycle publications for its styling, comfort, and iconic V-twin performance.

Consumer Ratings:

Generally high customer satisfaction for its intended use as a cruiser, praised for its classic styling and comfortable ride.

Manufacturing Standards:

Manufactured to meet all relevant US EPA and DOT (Department of Transportation) regulations for motorcycles.