🏷️ Basic Information

Make:

Harley-Davidson

Model:

FXSTDI Softail Deuce

Year:

2006

Engine Variant:

1450cc (88 cubic inch) V-Twin

Vin Engine Code:

Refer to VIN plate and engine case markings; typically 'H' for Harley-Davidson, followed by model and year specific characters.

Chassis Code:

FXSTDI

👋 Introduction

Positioning:

The FXSTDI Softail Deuce was positioned as a premium cruiser in Harley-Davidson's Softail lineup, offering a blend of classic styling with modern features, targeting riders who appreciated custom aesthetics and comfortable long-distance riding.

Competitors:

Competed with other large-displacement cruisers from manufacturers like Indian, and custom-oriented models from Japanese manufacturers.

Styling:

Distinctive drag-style handlebars, raked-out front end, extended front fork, custom wheels, and a swept-back exhaust system.

Engine Platform:

Utilized the proven Twin Cam 88B engine, known for its torque and reliability, featuring counterbalancers for smoother operation.

Ride Comfort:

Softail frame design with hidden rear suspension provides a rigid frame appearance with improved ride comfort compared to earlier rigid frames.

📋 Manual Details

Manual Type:

Factory Service Repair Workshop Manual

Language:

English

Format:

PDF Download

Availability:

Instant Download

Completeness:

Complete Factory Documentation

📖 Manual Coverage

Engine:

Twin Cam 88B, carbureted and fuel-injected variants (specific to 2006 FXSTDI which is fuel injected), disassembly, assembly, diagnosis, performance tuning.

Transmission:

5-speed Cruise Drive transmission, internal components, clutch, final drive, lubrication, repair, and overhaul procedures.

Fuel System:

Fuel injection system (EFI - Electronic Fuel Injection), fuel pump, injectors, throttle body, sensors, diagnostic codes, maintenance, and troubleshooting.

Electrical System:

Ignition system, charging system (alternator/stator, regulator/rectifier), starting system (starter motor, solenoid), battery, lighting, switches, relays, fuses, wiring diagrams, diagnostics, troubleshooting.

Brakes:

Front and rear brake systems, hydraulic lines, calipers, master cylinders, rotors, pads, bleeding procedures, service, and repair.

Suspension:

Front telescopic forks (including internal components, seals, and oil), rear shock absorbers, swingarm, wheel bearings, service, and adjustment.

Chassis Frame:

Frame structure, steering head, wheelbase, geometry, maintenance, and inspection.

Bodywork Fittings:

Fuel tank, fenders, seat, handlebars, controls, instrumentation, mirrors, lighting components, fairings (if applicable), and trim.

Wheels Tires:

Wheel types, tire specifications, inflation pressures, balancing, wheel bearing service, and replacement.

Maintenance:

Routine service intervals, oil changes, filter replacements, spark plug service, chain adjustment (if applicable, though Deuce is belt-driven), brake fluid changes, coolant flush (if applicable, though typically air-cooled).

Troubleshooting:

System-specific fault finding, diagnostic procedures, common problems, and corrective actions based on symptoms.

Repair:

Step-by-step instructions for component disassembly, repair, reassembly, and adjustment for all major vehicle systems.

Diagnostics:

Detailed diagnostic procedures for electrical and electronic systems, including reading diagnostic trouble codes (DTCs) and interpreting sensor data.

Overhaul:

Complete engine and transmission overhaul procedures, including specifications for critical wear components.

Depth:

Comprehensive, suitable for professional technicians and experienced DIY mechanics. Covers everything from basic maintenance to complete engine rebuilds.

Detail Level:

Detailed diagrams, torque specifications, clearances, wiring schematics, and component identification.

📊 Manual Specifications

Format:

PDF

Searchability:

Searchable text content for easy navigation and information retrieval.

Quality:

High-resolution scans, clear text and legible diagrams.

Binding:

N/A (Digital PDF download)

Paper:

N/A (Digital PDF download)

⚙️ Engine Specifications

Engine Type:

Harley-Davidson Twin Cam 88B V-Twin

Displacement:

1450 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

Valve Train:

Overhead valves (OHV), pushrod actuated, 2 valves per cylinder

Cooling System:

Air-cooled

Engine Oil Capacity:

3.5 US quarts (3.3 Liters) with filter change.

Engine Oil Type:

Harley-Davidson recommended V-Twin 20W-50 synthetic or semi-synthetic motorcycle oil.

Horsepower:

Approximately 65-70 HP (figures vary slightly based on measurement and specific tuning).

Torque:

Approximately 86 lb-ft (116 Nm) at 3500 RPM.

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Premium Unleaded Gasoline (91 octane or higher recommended).

Fuel Tank Capacity:

4.0 US gallons (15.1 Liters).

🔧 Transmission

Transmission Type:

5-speed constant mesh, helical gears

Clutch Type:

Wet, multi-plate, diaphragm spring

Final Drive:

Belt drive, 140 tooth primary belt, 32 tooth final drive sprocket

Gear Ratios:

1st: 9.312, 2nd: 6.448, 3rd: 4.717, 4th: 3.811, 5th: 3.154

Transmission Fluid Type:

Harley-Davidson recommended SYN3 Synthetic Motorcycle Lubricant or equivalent (check manual for specific HD part number/spec).

Transmission Fluid Capacity:

Approximately 1.0 US quart (0.95 Liters).

📐 Dimensions

Overall Length:

Approximately 97.8 inches (2484 mm)

Wheelbase:

Approximately 66.5 inches (1689 mm)

Ground Clearance:

Approximately 5.1 inches (130 mm)

Seat Height Laden:

Approximately 27.4 inches (696 mm)

Handlebars Width:

Approximately 37.0 inches (940 mm)

Dry Weight:

Approximately 660 lbs (299 kg)

Gross Vehicle Weight Rating Gvwr:

Not explicitly stated in basic specs, but typical for this class around 900-1000 lbs.

🛡️ Safety Features

Crash Test Ratings:

Motorcycles are generally not subjected to standardized crash testing like automobiles. Safety is reliant on design and rider input.

Braking System:

Dual front disc brakes, single rear disc brake with hydraulic actuation.

Lighting:

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

Frame Construction:

Steel frame and swingarm designed for stability and rider control.

Ergonomics:

Rider-centric ergonomics for comfort and control, though riding position is subjective.

💡 Technology Features

Audio System:

Optional accessory audio systems were available, not standard on all models. The manual would cover installation and basic troubleshooting if equipped.

ABS:

Anti-lock Braking System (ABS) was an optional feature on some 2006 Harley-Davidson models, and if equipped, would be detailed in the manual.

Diagnostic Tools:

Requires Harley-Davidson specific diagnostic tools (e.g., Digital Technician) for advanced electronic diagnostics and calibration, which the manual would reference.

🔧 Maintenance

Initial Service:

500 miles (800 km) - Includes oil and filter change, inspection of all controls, cables, and fasteners.

Subsequent Service:

Every 5,000 miles (8,000 km) or annually - Includes engine oil and filter change, inspection of primary drive, transmission, brakes, tires, and chassis components.

Spark Plugs:

Replace every 10,000 miles (16,000 km) or as needed based on condition (e.g., Harley-Davidson 6R12).

Brake Fluid:

Flush and replace every 2 years or as per manual recommendation.

Engine Oil:

Harley-Davidson V-Twin 20W-50 (SYN3 recommended) or SAE 20W-50 motorcycle oil meeting Harley-Davidson specifications.

Transmission Oil:

Harley-Davidson SYN3 Synthetic Motorcycle Lubricant or a compatible SAE 85W-140 hypoid gear oil.

Primary Chain Case Oil:

Harley-Davidson primary lubricant or a compatible SAE 85W-140 hypoid gear oil.

Brake Fluid:

DOT 4 Hydraulic Brake Fluid.

Common Problems:

Potential issues include early style cam chain tensioner wear (though improved in later models), oil leaks from gaskets and seals, stator failure (leading to charging issues), and some electrical gremlins. The manual provides diagnostic procedures for all these.

Oil Filter Example:

Harley-Davidson Part Number: 63796-77A (or equivalent aftermarket).

Spark Plug Example:

Harley-Davidson Part Number: 6R12 (or equivalent).

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, boasts over a century of motorcycle manufacturing, establishing itself as an iconic American brand synonymous with freedom and custom culture.

Softail Lineage:

The Softail platform, introduced in 1983, revolutionized cruiser design by mimicking the look of a hardtail frame while incorporating hidden rear suspension for improved ride comfort. The Deuce model, introduced in 1999, evolved this platform with a more custom, stretched-out aesthetic.

Fxstdi Specifics:

The 2006 FXSTDI represented a refinement of the Deuce model, featuring the Twin Cam 88B engine and fuel injection, and contributing to Harley-Davidson's dominance in the cruiser market.

Manufacturing Location:

United States (e.g., York, Pennsylvania; Milwaukee, Wisconsin).

Production Years Deuce:

1999-2007

🏆 Awards & Recognition

Market Awards:

Specific awards for the 2006 FXSTDI are not widely publicized, but the Softail line has consistently received accolades for its styling and V-twin performance within the cruiser segment.

Customer Satisfaction:

Harley-Davidson generally scores well in customer satisfaction for its iconic brand appeal and ownership experience, though specific model ratings can vary.