🏷️ Basic Information

Make:

Harley-Davidson

Model:

Softail

Year:

2006

Chassis Code:

FXST, FXSTI, FXSTS, FXSTSI, FXSTB, FXSTBI, FXSTC, FXSTCI

👋 Introduction

Market Segment:

Cruiser motorcycle, specifically Harley-Davidson's Softail line, known for its classic styling and V-twin engine.

Competitors 2006:

Other Harley-Davidson models, Indian Motorcycles, select models from Japanese manufacturers (e.g., Yamaha Road Star, Honda Shadow) and European manufacturers.

Softail Platform Features:

Rigid appearance with hidden rear suspension, characteristic V-twin engine, classic styling cues, diverse model range within the Softail family.

📋 Manual Details

Manual Coverage Scope:

Complete factory service and repair

Estimated Page Count:

Hundreds

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Systems:

Fuel system, ignition system, lubrication system, cooling system (if applicable), exhaust system, internal engine components (cylinder head, pistons, crankshaft, camshafts, valves), engine tuning and diagnostics

Transmission Drivetrain:

Clutch, primary drive, transmission gears and shafts, final drive belt, shifter mechanism, lubrication

Electrical System:

Battery, charging system (stator, regulator/rectifier), starting system (starter motor, solenoid), ignition system, lighting (headlight, taillight, turn signals), instrumentation, wiring diagrams, fuses, relays, diagnostic connectors (e.g., HD-LAN)

Chassis Suspension Brakes:

Frame, front suspension (forks, steering head bearings), rear suspension (shock absorbers, swingarm), wheel bearings, brake system (master cylinders, calipers, rotors, lines, pads, bleeding procedures), anti-lock braking system (ABS) diagnostics and service

Bodywork And Trim:

Body panels, fenders, fuel tank, seat, handlebars, controls, mirrors, exhaust system components, accessory installation

Maintenance Procedures:

Scheduled maintenance, oil changes, filter replacement, spark plug replacement, brake fluid flush, clutch adjustment, belt tension check, battery maintenance, tire pressure checks

Repair Procedures:

Engine overhaul, transmission rebuild, clutch replacement, fork seal replacement, brake caliper overhaul, electrical component diagnosis and replacement, body panel repair and replacement

Troubleshooting Diagnostics:

Step-by-step diagnostic charts for common and uncommon issues, error code interpretation, wiring diagram analysis

Special Tools And Techniques:

Required specialty tools for specific procedures, torque specifications for all fasteners, critical assembly sequences

Technical Depth Level:

Comprehensive, covering from basic user maintenance to full engine and transmission overhauls, including electrical diagnostics and advanced troubleshooting.

📊 Manual Specifications

File Format Details:

PDF (Portable Document Format), allowing for digital viewing, searching, and selective printing.

Print Quality Attributes:

High resolution, suitable for printing individual pages or the entire manual. Includes clear diagrams and schematics.

Binding Type For Printed Version:

Not applicable for PDF download; printable format allows for custom binding (e.g., spiral, three-ring).

Paper Type For Printed Version:

Not applicable for PDF download; suggests standard printer paper.

⚙️ Engine Specifications

Engine Family:

Harley-Davidson Twin Cam 88B / 96 (depending on specific Softail variant and emissions compliance for the year)

Engine Configuration:

Air-cooled, 45-degree V-twin

Bore X Stroke:

For Twin Cam 88B: 3.75 in. x 4.00 in. (95.25 mm x 101.6 mm)

Displacement:

For Twin Cam 88B: 88 cubic inches (1450 cc)

Compression Ratio:

Typically 8.3:1 to 9.1:1 depending on specific model and tuning

Horsepower Rating:

Approx. 65-70 HP (varies by model and exhaust)

Torque Rating:

Approx. 80-85 ft-lbs @ 3500 RPM (varies by model)

Fuel Delivery System:

Fuel Injection (EFI) - Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

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

Ignition Type:

Electronic Ignition (Spark Ignition)

Oil Type Engine:

Harley-Davidson Synchronized Formula SAE 20W50 or equivalent V-twin specific motorcycle oil

Oil Capacity Engine:

Approx. 4 quarts (3.8 Liters) with filter change

🔧 Transmission

Transmission Type:

5-speed constant mesh manual transmission

Optional Transmission:

Not applicable for 2006 Softail models; all equipped with 5-speed manual.

Primary Drive Type:

Duplex chain primary drive with wet, multi-plate clutch

Final Drive Type:

Belt drive, 32mm wide, 140-tooth belt

Transmission Oil Type:

Harley-Davidson Transmission Lubricant SAE 80W-90 or equivalent gear oil

Transmission Oil Capacity:

Approx. 24 US fl oz (0.71 Liters)

📐 Dimensions

Overall Length:

Varies by specific Softail model (e.g., FXST, FXSTB, FXSTC), generally around 93 inches (2362 mm)

Wheelbase:

Varies by model, approx. 64.5-65.5 inches (1638-1664 mm)

Dry Weight:

Varies by model, typically 650-700 lbs (295-318 kg)

Gross Vehicle Weight Rating:

Varies by model, typically around 1000-1100 lbs (454-499 kg)

Fuel Tank Capacity:

Varies by model, typically 4.0-5.0 US gallons (15.1-18.9 Liters)

🛡️ Safety Features

Safety Ratings:

Not applicable in the same way as automobiles; focus is on rider safety features and design integrity.

Active Safety Features:

Optional Anti-lock Braking System (ABS) on some models, responsive braking components.

Passive Safety Features:

Sturdy frame construction, compliant suspension, rider controls designed for stability.

💡 Technology Features

Infotainment Features:

Base models typically feature analog instrumentation. Higher-end or optioned models might include integrated audio systems (radio/CD player) and cruise control.

Driver Assistance Systems:

Optional ABS (Anti-lock Braking System) available on select models.

Connectivity Options:

Limited connectivity in the modern sense; typically relies on dealer diagnostic tools and the HD-LAN communication network for electronic diagnostics.

Diagnostic Capabilities:

On-board diagnostics via the VCI (Vehicle Communication Interface) and diagnostic software; manual provides guidance on interpreting codes and performing diagnostic tests.

🔧 Maintenance

Initial Service Interval:

First service typically recommended at 1,000 miles (1600 km) or 6 months, whichever comes first.

Engine Oil Change Interval:

Every 5,000 miles (8,000 km) or 12 months, whichever comes first, or as per specific oil manufacturer recommendations.

Transmission Oil Change Interval:

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

Primary Chain Case Oil Change Interval:

Every 5,000 miles (8,000 km) or 12 months, whichever comes first.

Spark Plug Replacement Interval:

Typically at 10,000-15,000 miles (16,000-24,000 km), refer to manual for specific plug type and gap.

Brake Fluid Type:

DOT 4, non-silicone based hydraulic fluid

Clutch Fluid Type:

DOT 4, non-silicone based hydraulic fluid (for hydraulic clutch models)

Fork Oil Type:

Harley-Davidson Type E or equivalent SAE 10W fork oil

Common Wear Items:

Clutch plates, brake pads, drive belt, wheel bearings, steering head bearings, battery.

Potential Reliability Concerns:

Some owners report issues with charging systems (regulator/rectifier), oil leaks from engine/transmission seals, and premature wear of certain suspension components. The manual will guide diagnostics for these.

Typical Tune Up Components:

Spark plugs, air filter, fuel filter (if applicable/accessible), engine oil and filter, primary and transmission oil.

📚 Vehicle History

Harley Davidson Legacy:

Established in 1903, Harley-Davidson is an iconic American motorcycle manufacturer known for its V-twin engines, custom styling, and strong brand identity.

Softail Line Introduction:

The Softail platform was introduced in 1983, featuring a concealed rear suspension to mimic the hardtail look of classic motorcycles while providing modern ride comfort.

2006 Softail Updates:

The 2006 model year saw continued refinement of the Twin Cam engine, chassis updates, and the introduction of various Softail sub-models like the FXST, FXSTI (with ABS), FXSTB ('Night Train'), FXSTS ('Springer'), and FXSTC ('Custom').

Manufacturing Location:

Primarily assembled in York, Pennsylvania, USA, with components sourced globally.

🏆 Awards & Recognition

Industry Recognition:

Harley-Davidson motorcycles, including the Softail line, are consistently recognized for their styling, sound, and cultural impact within the motorcycle community.

Reliability Ratings:

Reliability varies; diligent maintenance as outlined in the manual is crucial for optimal performance and longevity. Consumer reports and owner surveys can provide specific model year insights.

Emissions Compliance:

Models conform to EPA and CARB emissions standards for their respective production year.