🏷️ Basic Information

Make:

Harley-Davidson

Model:

Softail Deluxe

Model Code:

FLSTN

Year:

2015

Product Name:

Harley Davidson SOFTAIL 2015 JD FLSTN SOFTAIL DELUXE Service Repair Manual

👋 Introduction

Positioning:

The 2015 Harley-Davidson Softail Deluxe (FLSTN) targets riders seeking a classic, retro-styled cruiser with modern performance and comfort. It competes with other V-twin cruisers from American manufacturers and some Japanese brands offering retro aesthetics.

Competitors:

Key competitors include models like the Indian Chief Vintage, and certain offerings from Victory Motorcycles (when they were in production). Buyers often cross-shop based on styling, brand heritage, and engine characteristics.

Features:

Iconic styling with whitewall tires, chrome detailing, fluted front forks, a wide handlebar, and a comfortable, low seat. It offers a blend of nostalgic design and the reliable performance of Harley-Davidson's Twin Cam engine.

📋 Manual Details

Primary Coverage:

Full service, maintenance, and repair of the 2015 Harley-Davidson FLSTN Softail Deluxe motorcycle.

Secondary Coverage:

Troubleshooting, diagnostics, wiring diagrams, torque specifications, specifications tables.

Estimated Pages:

Likely between 500-800 pages, typical for a comprehensive factory service manual.

Type:

Service Repair Manual

Language:

English

Format:

Likely Digital (PDF), but potential for printed versions depending on seller.

📖 Manual Coverage

Engine:

Disassembly, inspection, assembly, troubleshooting, performance tuning of the Twin Cam 103 engine.

Fuel System:

Fuel injection system (EFI), fuel pump, injectors, fuel lines, fuel tank, evaporative emissions control.

Ignition System:

Ignition module, coils, spark plugs, sensors (crankshaft position, camshaft position).

Transmission:

6-speed Cruise Drive transmission: disassembly, inspection, assembly, gear sets, shifting mechanism, clutch.

Drivetrain:

Primary drive, secondary drive (belt drive system), final drive belt maintenance and inspection.

Brakes:

Front and rear brake systems: hydraulic lines, master cylinders, calipers, rotors, brake pads, ABS system (if equipped).

Suspension:

Front forks (Telescopic), rear shock absorbers: disassembly, service, fluid replacement, calibration.

Electrical System:

Battery, charging system (stator, regulator/rectifier), starter motor, lighting (headlight, tail light, turn signals), gauges, switches, wiring diagrams.

Frame And Bodywork:

Frame inspection, body panels, fenders, fuel tank mounting, seat assembly, fairings (if applicable).

Controls:

Handlebars, throttle, clutch and brake levers, control cables, foot controls.

Diagnostics:

Troubleshooting charts, diagnostic trouble codes (DTCs), use of Harley-Davidson diagnostic tools (e.g., Digital Technician).

Scheduled Maintenance:

Oil changes, filter replacements, spark plug replacement, drive belt tensioning, brake fluid flush, fork oil replacement.

Major Repairs:

Engine rebuilds, transmission overhauls, suspension component replacement, electrical system component repair.

Troubleshooting:

Systematic diagnosis of common and uncommon problems with step-by-step guides.

Wiring Diagrams:

Detailed, color-coded wiring schematics for all electrical systems.

Torque Specifications:

Precise torque values for all critical fasteners throughout the motorcycle.

Depth:

Comprehensive, covering everything from basic fluid checks and adjustments to full engine and transmission rebuilds. Suitable for both DIY enthusiasts and professional technicians.

📊 Manual Specifications

Format:

Likely PDF, optimized for digital viewing and printing.

Quality:

High-resolution scans or digitally created content, ensuring clear text and diagrams. Color diagrams for wiring and components.

Binding:

N/A (for digital format). If printed, typically comb-bound or spiral-bound for lay-flat use in a workshop.

Paper:

N/A (for digital format). If printed, high-quality, durable paper suitable for workshop environments.

⚙️ Engine Specifications

Engine Type:

Air-cooled, Twin Cam 103B (B designation for counter-balanced).

Displacement:

1690 cc (103 cubic inches)

Bore X Stroke:

3.875 in. x 4.38 in. (98.4 mm x 111.3 mm)

Compression Ratio:

9.6:1 (typical for Twin Cam 103)

Valve Train:

Pushrod-actuated, overhead valves with two valves per cylinder.

Horsepower:

Approximately 77 HP (at crank, depending on tuning and specific model year variations).

Torque:

Approximately 99 ft-lbs (134 Nm) at 3500 RPM (typical for Twin Cam 103).

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI).

Fuel Capacity:

6 gallons (22.7 L)

Fuel Type:

91 octane or higher recommended unleaded gasoline.

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Gear Ratios:

1st: 9.312, 2nd: 6.415, 3rd: 4.793, 4th: 3.827, 5th: 3.207, 6th: 2.790 (Typical ratios for this transmission)

Optional Transmission:

N/A (Standard 6-speed Cruise Drive for this model).

Clutch Type:

Cable-actuated, 9-plate, wet clutch

Final Drive:

Carbon reinforced, belt drive, 32/66 ratio

📐 Dimensions

Length:

95.5 in. (2426 mm)

Width:

37.0 in. (940 mm)

Height:

49.5 in. (1257 mm)

Wheelbase:

64.2 in. (1630 mm)

Ground Clearance:

4.1 in. (104 mm)

Seat Height Laden:

25.5 in. (648 mm)

Dry Weight:

689 lbs (312 kg)

Wet Weight:

721 lbs (327 kg)

Gross Vehicle Weight Rating:

Not typically specified by Harley-Davidson in the same way as cars, but implied by chassis design for rider and passenger plus luggage.

🛡️ Safety Features

Safety Ratings:

Motorcycles are not subjected to the same crash testing standards as automobiles. Safety is primarily inherent in design, braking systems, and rider control.

Braking System:

Dual-channel ABS (Anti-lock Braking System) available as an option or standard depending on the specific variant. Hydraulic disc brakes front and rear.

Lighting:

Halogen headlight, LED tail light and brake light for improved visibility.

Frame Construction:

Steel frame designed for stability and handling.

💡 Technology Features

Infotainment System:

Base models typically feature a classic analog speedometer with integrated LCD display for odometer, trip meters, clock, and gear indicator. Optional infotainment systems (e.g., Boom! Audio) with radio and Bluetooth connectivity were available for some touring-oriented Softails or as dealer-installed accessories, but less common on the Deluxe model of this era.

ABS:

Available as an option, providing enhanced braking safety.

Connectivity Features:

Limited connectivity for this model year and trim, primarily focused on motorcycle operation. Aftermarket solutions are common for adding phone integration or audio streaming.

🔧 Maintenance

First Service:

Typically at 1,000 miles (1,600 km) for initial inspection, oil and filter change, and adjustments.

Subsequent Oil Change:

Every 5,000 miles (8,000 km) or annually, whichever comes first. Check manual for specifics.

Drive Belt Tension:

Inspect and adjust at 2,500 miles (4,000 km) and then every 5,000 miles (8,000 km).

Brake Fluid:

Flush and replace every two years.

Engine Oil Type:

Harley-Davidson V-Twin 20W-50 Synthetic (or equivalent API SG or higher, SAE 20W-50).

Engine Oil Capacity:

4.0 US quarts (3.8 L) with filter change.

Transmission And Primary Oil:

Harley-Davidson Genuine Formula Transmission/Primary Fluid or SYN3 Synthetic Motorcycle Oil. Check manual for capacity and type specifics for each reservoir.

Brake Fluid Type:

DOT 4 (for models equipped with ABS and/or hydraulic clutch, confirm with manual).

Fork Oil Type:

Harley-Davidson Type 'E' or 'S' (or equivalent, check manual for viscosity and type).

Common Issues:

Potential for oil leaks from primary cover or engine crankcase seals, clutch adjustment requirements, drive belt wear, and occasional electrical gremlins. The Twin Cam 103 generally offers good reliability when properly maintained.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history of producing V-twin powered motorcycles known for their distinctive sound, styling, and customization potential.

Softail Platform:

The Softail platform, introduced in 1984, is characterized by its hidden rear suspension, giving the appearance of a hardtail frame while providing rider comfort. The FLSTN Softail Deluxe has consistently embodied a retro aesthetic within this platform.

Production Years Deluxe:

The Softail Deluxe designation has been used by Harley-Davidson since the early 1990s, evolving with engine upgrades and styling tweaks over the years.

Manufacturing Location:

Harley-Davidson motorcycles are primarily manufactured in the United States, with key facilities in Milwaukee, Wisconsin, and York, Pennsylvania.

🏆 Awards & Recognition

Brand Recognition:

Harley-Davidson is a globally recognized brand synonymous with American motorcycle culture. The Softail line is a cornerstone of its cruiser offering.

Owner Satisfaction:

Generally high owner satisfaction for the Softail Deluxe, particularly for its styling and riding experience. Reliability ratings can vary depending on individual maintenance practices.

Emissions Certification:

Meets EPA and CARB emissions standards for the model year.