🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLSTSCI Softail Springer Classic

Year:

2006

Model Code:

FLSTSCI

Softail Platform Generation:

Evo-based Softail

👋 Introduction

Market Segment:

Cruiser, Classic Motorcycle

Target Audience:

Harley-Davidson owners, independent repair shops, motorcycle enthusiasts seeking detailed service information.

Competitive Set:

Other American V-twin cruisers, including models from Indian Motorcycle.

Unique Selling Proposition:

The distinctive Springer front end provides a classic aesthetic and ride feel, differentiating it from standard Softail models.

Manual Value Proposition:

Provides in-depth technical guidance for maintaining and repairing the specific components of the FLSTSCI, including the unique Springer front suspension.

📋 Manual Details

Systems Covered:

Engine, Transmission, Drivetrain, Chassis, Suspension, Brakes, Electrical System, Fuel System, Ignition System, Exhaust System, Cooling System, Frame, Bodywork, Wheels, Tires, Diagnostics, Troubleshooting, Maintenance, Schematics, Wiring Diagrams

Page Count:

Estimated 600-800 pages (typical for a WSM of this era)

Manual Type:

Service Repair Workshop Manual (WSM)

Language:

English

Format:

Likely PDF (digital), Print (physical)

📖 Manual Coverage

Engine Mechanics:

Detailed disassembly, assembly, inspection, and repair procedures for the Twin Cam 88B engine.

Fuel And Ignition:

Coverage of fuel injection (EFI), ignition timing, spark plugs, sensors, and emission control systems.

Transmission Drivetrain:

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

Electrical System:

Comprehensive wiring diagrams, electrical component testing, battery service, lighting, ignition, and starter systems.

Suspension Steering:

Detailed procedures for servicing the Springer front end, rear shock absorbers, swingarm, and steering head bearings.

Brake System:

Front and rear brake caliper overhaul, master cylinder service, hydraulic lines, and brake fluid replacement.

Chassis Frame:

Frame inspection, welding procedures (if applicable), and component mounting.

Bodywork Fenders:

Installation, removal, and adjustment of fenders, tank, seat, and other body panels.

Preventive Maintenance:

Scheduled maintenance intervals, oil changes, filter replacements, lubrication points, and pre-ride inspections.

Troubleshooting:

Diagnostic flowcharts and symptom-based troubleshooting for common issues.

Engine Overhaul:

Complete engine rebuild procedures, including piston ring installation, valve adjustments, and seal replacements.

Electrical Diagnostics:

Testing procedures for sensors, actuators, ignition coils, and ECUs using multimeters and diagnostic tools.

Suspension Service:

Fork seal replacement, rear shock absorber service, and springer mechanism maintenance.

Brake Bleeding:

Proper procedures for bleeding the hydraulic brake system.

Wheel Tire Service:

Tire mounting, balancing, and wheel bearing replacement.

Depth:

Comprehensive, from basic maintenance to complete engine and transmission rebuilds, including electrical schematics and diagnostic information.

📊 Manual Specifications

Digital Format Quality:

Searchable text, clear image reproduction of diagrams and photos.

Print Quality:

High-resolution scans, clear text, and legible diagrams.

Binding Type:

Spiral-bound or perfect-bound (for printed versions) for lay-flat usability in a workshop environment.

Paper Type:

Durable, coated paper stock (for printed versions) resistant to shop grease and oil.

⚙️ Engine Specifications

Engine Family:

Harley-Davidson Twin Cam 88B

Engine Type:

Air-cooled, 45-degree V-twin

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

Valve Train:

Overhead valves (OHV) with pushrods and rocker arms, 2 valves per cylinder

Horsepower Estimate:

Approx. 65-70 HP (at crank)

Torque Estimate:

Approx. 85-90 ft-lbs (at crank)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

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

Oil Type:

Harley-Davidson SYN3 (or equivalent SAE 20W50 synthetic motorcycle oil)

Oil Capacity:

4.0 US quarts (3.8 L) with filter change

🔧 Transmission

Transmission Type:

5-speed Cruise Drive

Gear Ratios:

1st: 9.342, 2nd: 6.420, 3rd: 4.774, 4th: 3.750, 5th: 3.150 (approximate, refer to manual for exact)

Clutch Type:

Wet, multi-plate, hydraulic actuation

Primary Drive:

Chain, 34/46 ratio

Final Drive:

Belt drive, 32/66 ratio

Transmission Oil Type:

Harley-Davidson Formula + (or equivalent SAE 50 gear oil)

Transmission Oil Capacity:

2.8 US quarts (2.6 L)

📐 Dimensions

Length:

Approx. 93.3 inches (2370 mm)

Width:

Approx. 37.0 inches (940 mm)

Height:

Approx. 52.0 inches (1320 mm)

Wheelbase:

Approx. 64.5 inches (1638 mm)

Dry Weight:

Approx. 680 lbs (308 kg)

Gross Vehicle Weight Rating Gvwr:

Approx. 1040 lbs (472 kg)

Front Wheel Size:

16-inch x 3.00-inch

Rear Wheel Size:

17-inch x 4.50-inch

Front Tire:

MT90B16 72H

Rear Tire:

150/80B17 72V

Wheel Bolt Pattern:

Not applicable (solid hubs for most HD models of this era)

🛡️ Safety Features

Crash Test Ratings:

Motorcycles are not subjected to traditional automotive crash test ratings.

Braking System:

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

Suspension Stability:

Springer front end with coil-over shocks, rear swingarm with coil-over shock absorbers.

Lighting:

Halogen headlamp, LED tail light, amber incandescent turn signals.

Horn:

Standard electric horn.

💡 Technology Features

Audio System:

Base models typically do not include a built-in audio system. Aftermarket options are common.

ABS:

Anti-lock Braking System (ABS) was an optional feature on some 2006 Harley-Davidson models and may or may not be present on this specific FLSTSCI. Manual will cover if equipped.

Diagnostic Tools:

Requires specific Harley-Davidson diagnostic tools (e.g., Digital Technician) for advanced diagnostics and ECM re-flashing.

🔧 Maintenance

Initial Service:

First service typically at 1,000 miles (1,600 km).

Subsequent Oil Change:

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

Primary Chain Adjustment:

Check and adjust every 5,000 miles (8,000 km).

Spark Plug Replacement:

Every 10,000 miles (16,000 km) or as needed.

Brake Fluid Flush:

Every 2 years.

Engine Oil Specification:

SAE 20W50 Synthetic Motorcycle Oil (e.g., Harley-Davidson SYN3)

Transmission Oil Specification:

SAE 50 Gear Oil (e.g., Harley-Davidson Formula +)

Primary Chain Case Oil Specification:

Harley-Davidson Formula + (or equivalent)

Brake Fluid Specification:

DOT 4 Hydraulic Fluid

Common Wear Items:

Clutch friction plates, primary chain tensioner, battery, fork seals, brake pads.

Potential Springer Issues:

Wear in the springer fork joints and bushings, requiring periodic inspection and lubrication.

Fuel System Considerations:

Early EFI systems may require occasional tuning or sensor checks.

📚 Vehicle History

Brand History:

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

Softail Platform Origin:

The Softail platform, introduced in 1984, is characterized by its concealed rear suspension, mimicking the look of a hardtail frame.

Springer Heritage:

The Springer front end is a revival of an early motorcycle suspension design, first used by Harley-Davidson in the early 20th century.

Flstsci Introduction:

The FLSTSCI Softail Springer Classic represents a blend of classic styling with modern components, including fuel injection and the Twin Cam engine.

Production Years:

The FLSTSCI model was produced for several years within the 2000s, with 2006 being a specific model year.

Manufacturing Location:

Harley-Davidson motorcycles are primarily manufactured in the United States.

🏆 Awards & Recognition

Model Recognition:

The Softail platform and Springer models are consistently recognized for their classic styling and cruiser appeal within the motorcycle community.

Reliability Ratings:

Harley-Davidson motorcycles of this era are generally considered reliable with proper maintenance, though specific components may have known wear patterns.

Manual Certification:

This is an OEM-equivalent workshop manual, providing factory-level procedures and specifications.