🏷️ Basic Information

Make:

Harley-Davidson

Model:

Softail

Year:

2010

Platform Code:

D4

Engine Family Code:

Twin Cam 103B (for most models, check specific variant)

👋 Introduction

Target Audience:

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

Value Proposition:

Provides comprehensive DIY repair and maintenance information, saving time and money on dealership service.

Alternative Sources:

Dealership service, other third-party repair manuals (less comprehensive).

Instruction Style:

Step-by-step instructions with supporting diagrams and illustrations.

Technical Accuracy:

Developed and used by professional mechanics, ensuring high accuracy.

📋 Manual Details

Manual Type:

Service Repair Workshop Manual

Language:

English

Format:

Likely PDF (digital) or Printed Book

Estimated Page Count:

500-800 pages (typical for comprehensive service manuals)

📖 Manual Coverage

Engine Systems:

Engine disassembly, assembly, inspection, tuning, lubrication, cooling (air-cooled), fuel injection (EFI), ignition system, starting system, charging system.

Transmission Drivetrain:

Clutch, transmission assembly and disassembly, primary drive, final drive (belt drive), lubrication, adjustments.

Chassis Suspension:

Frame, front fork assembly (including telescopic forks), rear suspension (shock absorbers, swingarm), wheel bearings, steering head bearings.

Braking System:

Front and rear brake caliper service, brake pads, master cylinders, brake lines, bleeding procedures, ABS (if equipped).

Electrical System:

Wiring diagrams, lighting, horn, starter motor, battery, ignition switch, instrument cluster, diagnostic codes (DLC), sensors, ECM (Engine Control Module) functions.

Fuel System:

Fuel tank, fuel pump, fuel lines, fuel injectors, throttle body, fuel pressure testing.

Bodywork Trim:

Fender removal and installation, fuel tank removal, seat removal, fairings (if applicable), decorative trim.

Maintenance:

Routine maintenance checks, oil changes, filter replacements, spark plug service, brake fluid changes, battery maintenance, tire pressure checks.

Repair Rebuild:

Complete engine disassembly and reassembly, transmission overhauls, fork seal replacement, brake caliper rebuild, electrical component replacement.

Diagnostics Troubleshooting:

Step-by-step diagnostic procedures for common problems, fault code interpretation, troubleshooting electrical and mechanical issues.

Adjustments:

Clutch cable adjustment, throttle cable adjustment, idle speed adjustment, suspension adjustments.

Diagnostic Tools:

Information on using diagnostic tools like Harley-Davidson's Digital Technician or equivalent for accessing fault codes and live data.

Torque Specifications:

Detailed torque specifications for all critical fasteners and components.

Clearances Tolerances:

Specific measurements for valve clearances, piston ring gaps, bearing clearances, etc.

Wiring Diagrams:

Comprehensive and clear wiring diagrams for all electrical systems.

📊 Manual Specifications

File Type:

Digital (PDF)

Searchability:

Searchable text content for quick information retrieval.

Image Resolution:

High-resolution images and diagrams for clarity.

Binding:

N/A (if digital); Perfect Bound or Spiral Bound (if printed)

Paper Quality:

N/A (if digital); Durable, high-quality paper stock suitable for workshop environments (if printed)

⚙️ Engine Specifications

Engine Type:

V-Twin, air-cooled, 45-degree cylinder angle

Engine Displacement:

96 cu. in. (1584 cc) for many models, potentially 103 cu. in. (1690 cc) depending on Softail variant.

Bore X Stroke:

3.75 in. x 4.38 in. (95.25 mm x 111.25 mm) for 96ci; 3.875 in. x 4.375 in. (98.4 mm x 111.1 mm) for 103ci

Compression Ratio:

9.2:1 (typical for 96ci and 103ci)

Horsepower Rating:

Approximately 70-80 HP (peak, estimated, varies by model and tuning)

Torque Rating:

Approximately 90-100 ft-lbs (peak, estimated, varies by model and tuning)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI) - Delphi

Fuel Type:

Unleaded gasoline, minimum 91 octane (RON+MON)/2

Oil Type:

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

Oil Capacity:

Approximately 4 quarts (3.8 liters) with filter change.

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Primary Drive:

Duplex chain

Final Drive:

Belt drive, 32T front pulley, 66T rear pulley (typical)

Clutch Type:

Hydraulic, multi-plate wet clutch

Transmission Fluid Type:

Harley-Davidson Formula+ Transmission and Primary Chain Lubricant or equivalent.

Transmission Fluid Capacity:

Approximately 2.7 quarts (2.5 liters) for transmission and primary combined.

📐 Dimensions

Length:

Varies by specific Softail model (e.g., Fat Boy, Heritage Softail, Deluxe), typically 90-97 inches.

Seat Height Laden:

Varies by model, typically 24-26 inches.

Dry Weight:

Varies by model, typically 640-700 lbs (290-317 kg).

Gross Vehicle Weight Rating:

Typically around 1160 lbs (526 kg).

Fuel Capacity:

Approximately 5.0 gallons (18.9 liters).

🛡️ Safety Features

Safety Certifications:

Meets or exceeds US EPA and CARB emissions standards for the model year.

Braking System Type:

Hydraulic disc brakes, front and rear. Optional ABS (Anti-lock Braking System) available on some models.

Lighting:

Halogen headlamp, LED or incandescent tail lamps, turn signals.

Frame Construction:

Steel, cradle frame design.

Tires:

Tubeless, radial tires; specific sizes vary by model (e.g., front 130/90B16, rear 150/80B16).

💡 Technology Features

Instrument Cluster:

Analog speedometer, tachometer (optional), fuel gauge, gear indicator, odometer, trip meters, diagnostic indicators.

Audio System:

Not standard on all Softail models. If equipped, typically a basic AM/FM radio with auxiliary input or CD player on some touring-oriented Softails.

ABS Availability:

Optional on select 2010 Softail models, requiring specific service procedures if equipped.

Diagnostic Port:

Diagnostic Link Connector (DLC) for interface with digital diagnostic tools.

🔧 Maintenance

Initial Service:

500 miles or 1 month (whichever comes first) - check oil, primary chain tension, and general inspection.

Regular Oil Change:

Every 5,000 miles or 6 months (whichever comes first) for engine oil and filter.

Transmission Primary Service:

Every 10,000 miles or 12 months for transmission and primary lubricant change.

Spark Plug Replacement:

Every 15,000 miles or 24 months.

Brake Fluid Flush:

Every 24 months (DOT 4 fluid).

Engine Oil Viscosity:

SAE 20W-50

Engine Oil Specification:

Harley-Davidson SYN3, API SG or higher, JASO FD/FE approved (check manual for specific approvals)

Transmission Primary Fluid:

Harley-Davidson Formula+, API GL-4 SAE 85W-140

Brake Fluid Type:

DOT 4 (Harley-Davidson premium synthetic brake fluid recommended)

Cam Chain Tensioner Wear:

Early models (pre-2007) had hydraulic tensioners that could wear. 2010 models typically have upgraded hydraulic tensioners or earlier models with upgraded components, but manual will cover inspection and replacement if needed.

Primary Chain Alignment:

Proper alignment and tension adjustment are crucial for primary drive longevity.

Internal Wiring Harness:

Some models may experience intermittent issues with internal wiring harnesses, especially at steering head or under the seat. Manual provides diagnostic procedures.

Idle Control Module:

Potential for issues with the idle air control (IAC) system on fuel-injected models, impacting idle quality.

📚 Vehicle History

Manufacturer Origin:

United States

Brand Philosophy:

Emphasis on cruiser motorcycle design, V-twin engines, and the 'Riding is a lifestyle' ethos.

Softail Lineage:

The Softail platform, known for its hidden rear suspension mimicking a hardtail look, has been a core offering since its introduction in 1983. The 2010 models feature evolved versions of this design and the Twin Cam engine.

Manufacturing Locations:

Primary assembly in York, Pennsylvania, USA, and Kansas City, Missouri, USA.

🏆 Awards & Recognition

Model Recognition:

Harley-Davidson's Softail line is consistently recognized for its classic styling and comfortable ride, making it a popular choice in the cruiser market.