🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLHR Road King

Year:

2015

Model Code:

FLHR

Vin Character Position 1:

5

Vin Character Position 6:

3

👋 Introduction

Vehicle Segment:

Full-size, V-twin cruiser motorcycle, a cornerstone of the Harley-Davidson touring lineup.

Key Competitors:

Models from Indian Motorcycle (e.g., Chief), Victory Motorcycles (though discontinued), and potentially other large-displacement cruisers from Japanese manufacturers.

Signature Design:

Classic Harley-Davidson styling, large V-twin engine, comfortable riding position, large saddlebags, and distinctive windshield.

Target Audience:

Touring riders, long-distance commuters, and enthusiasts seeking a classic American motorcycle experience.

Primary Benefit:

Empowers owners and technicians with the detailed knowledge required for accurate servicing, maintenance, and repair, ensuring longevity and optimal performance.

📋 Manual Details

Manual Coverage Scope:

Comprehensive service and repair for the 2015 Harley-Davidson FLHR Road King.

Estimated Page Count:

Approximately 700-900 pages (typical for comprehensive factory service manuals).

Manual Classification:

Factory Service Repair Workshop Manual

Language Of Manual:

English

Delivery Format:

Downloadable Digital Format (PDF)

📖 Manual Coverage

Engine System:

Detailed coverage of the Twin Cam 103 engine, including inspection, overhaul, component testing, and diagnosis.

Fuel System:

EFI (Electronic Fuel Injection) system, fuel pump, injectors, sensors, throttle body, and diagnostic procedures.

Ignition System:

Ignition module, spark plugs, coils, and troubleshooting for ignition-related issues.

Transmission And Drivetrain:

6-speed Cruise Drive transmission, clutch assembly, primary drive, final drive belt, and related components.

Electrical System:

Full wiring diagrams, charging system (alternator, regulator), starting system (starter, solenoid), lighting, instrumentation, and accessories.

Brakes System:

Hydraulic brake system, calipers, master cylinders, rotors, lines, ABS (if equipped), and bleeding procedures.

Suspension System:

Front forks (telescopic, air-assisted), rear shock absorbers, and related components.

Chassis And Frame:

Frame components, steering head, wheel bearings, and related structural elements.

Bodywork And Fenders:

Fairing, fuel tank, fenders, saddlebags, and mounting hardware.

Diagnostics And Troubleshooting:

Systematic troubleshooting guides, diagnostic codes, and symptom-based repair strategies.

Scheduled Maintenance:

Detailed procedures for all recommended maintenance tasks, including oil changes, filter replacements, chain adjustments (if applicable), and inspections.

Engine Repair:

Complete engine disassembly, reassembly, component replacement (pistons, rings, valves, etc.), and tuning.

Transmission Repair:

Clutch adjustment, transmission disassembly, gear inspection, and reassembly.

Brake Service:

Brake pad replacement, caliper service, master cylinder overhaul, and brake fluid flushing.

Electrical Diagnostics:

Troubleshooting electrical faults, wiring repairs, component testing, and charging/starting system diagnostics.

Suspension Service:

Fork seal replacement, fork oil changes, rear shock absorber service.

Bodywork Installation And Repair:

Procedures for removing, installing, and repairing body panels, fairings, and luggage systems.

Wiring Diagram Interpretation:

Detailed explanations and color-coded wiring diagrams for all electrical circuits.

Diagnostic Capability:

Advanced diagnostic procedures, including use of diagnostic tools (e.g., Harley-Davidson Digital Technician) and interpretation of diagnostic trouble codes (DTCs).

Rebuild Procedures:

Complete engine and transmission rebuild procedures, including torque specifications, clearances, and critical measurements.

Customization Guidelines:

While primarily a service manual, it may contain information useful for understanding factory specifications relevant to customization.

📊 Manual Specifications

Digital File Type:

PDF (Portable Document Format)

Digital Resolution:

High-resolution, suitable for clear viewing and printing of text and diagrams.

Digital Searchability:

Searchable text for quick information retrieval. Internal links may be present for navigation.

Print Recommendation:

Formatted for printing on standard A4 or Letter paper. Professional binding is recommended for a physical copy.

⚙️ Engine Specifications

Engine Family:

Harley-Davidson Twin Cam

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

1690 cc (103 cubic inches)

Bore X Stroke:

3.875 in. x 4.380 in. (98.4 mm x 111.3 mm)

Compression Ratio:

9.6:1

Horsepower Rating:

Approximately 78 HP @ 5010 RPM (advertised; actual may vary slightly)

Torque Rating:

Approximately 101 lb-ft @ 3250 RPM (advertised; actual may vary slightly)

Fuel Delivery System:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, minimum 91 octane (USA) / 95 RON (Europe)

🔧 Transmission

Transmission Type:

6-Speed Cruise Drive Manual

Optional Transmission:

N/A for this model year and configuration.

Clutch Type:

Hydraulically actuated, multi-plate wet clutch

Final Drive:

Carbon reinforced belt, 32/66 ratio

📐 Dimensions

Overall Length:

93.3 in. (2370 mm)

Seat Height Laden:

26.1 in. (663 mm)

Ground Clearance:

5.1 in. (130 mm)

Dry Weight:

732 lbs. (332 kg)

Weight In Running Order:

772 lbs. (350 kg)

Gross Vehicle Weight Rating:

1260 lbs. (571 kg)

🛡️ Safety Features

Crash Test Ratings:

Motorcycles are typically not subjected to standardized automotive crash tests. Safety relies on design and rider skill.

Braking System:

Dual-front and single-rear disc brakes with optional Anti-lock Braking System (ABS).

Lighting:

Halogen headlight, LED taillight and brake light, turn signals.

Frame Construction:

Sturdy steel frame designed for stability and handling.

Wind Protection:

Large, detachable windscreen for rider comfort and protection from elements.

💡 Technology Features

Audio System:

Integrated Boom! Box audio system with AM/FM, optional CB/Intercom, and 5.25-inch speakers (may vary by specific sub-model/package).

Display:

Analog gauges with a small LCD screen for odometer, gear indicator, fuel level, etc. (Boom! Box models have a larger display).

ABS:

Optional Anti-lock Braking System (ABS) available for enhanced braking safety.

Diagnostics Port:

Diagnostic connector for access to Engine Control Module (ECM) data and DTC retrieval.

🔧 Maintenance

Engine Oil Change:

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

Primary Chain Case Oil Change:

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

Transmission And Primary Oil Change:

Every 10,000 miles (16,000 km) or 24 months (transmission); primary case oil also checked at every 5,000-mile service.

Air Cleaner Service:

Inspect every 5,000 miles (8,000 km); replace as needed or per manual recommendation.

Spark Plug Replacement:

Inspect every 10,000 miles (16,000 km); replace as recommended.

Engine Oil Type And Viscosity:

Harley-Davidson V-Twin 20W-50 SYN3 (Synthetic) or equivalent API CI-4 or higher rated diesel engine oil.

Primary Chain Case Oil:

Harley-Davidson Primary Chain Lubricant or SAE 90-95W gear oil.

Transmission Oil:

Harley-Davidson Transmission Lubricant (SAE 80W-90) or synthetic equivalent.

Brake Fluid:

DOT 4 HD-DOT 4 (Harley-Davidson specification) or equivalent high-temperature glycol-based brake fluid.

Cam Chain Tensioners:

Pre-2007 Twin Cam models had issues with hydraulic tensioners wearing out. 2015 models use improved, but still mechanical, tensioners which can eventually require inspection/replacement.

Charging System Issues:

Occasional reports of stator or voltage regulator failure, especially after high mileage or modification.

Fuel Line Connections:

Early EFI fuel line fittings could be a point of failure; ensure proper securement and check for leaks.

📚 Vehicle History

Manufacturer Foundation:

Founded in 1903, Harley-Davidson is one of the oldest motorcycle manufacturers globally, renowned for its iconic V-twin engines and cruiser styling.

Road King Introduction:

The Road King model line was introduced in 1994, evolving from earlier large touring Harleys like the Electra Glide.

Twin Cam Introduction:

The Twin Cam engine platform, which powers this 2015 model, was introduced in 1999, gradually replacing the Evolution engine.

Manufacturing Location:

Primarily assembled in York, Pennsylvania, and Milwaukee, Wisconsin, USA.

🏆 Awards & Recognition

Model Awards:

Specific awards for the 2015 FLHR Road King are not commonly publicized like automotive awards; however, the model consistently receives positive reviews from motorcycle publications and owners for its touring capability and classic appeal.

Owner Satisfaction:

Harley-Davidson models generally enjoy high owner loyalty and satisfaction, particularly for their iconic status and riding experience.