🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLHR Road King

Year:

2015

Vehicle Code:

FLHR

Chassis Type:

Full Dress Touring Cruiser

👋 Introduction

Vehicle Segment:

Full-size touring cruiser, representing Harley-Davidson's iconic V-twin touring platform

Target Audience:

Long-distance touring riders, cruiser enthusiasts, DIY mechanics seeking to maintain and repair their Harley-Davidson motorcycle

Key Competitors:

Indian Chief Vintage, Honda Gold Wing (though more touring-focused), Victory Cross Country

Vehicle Philosophy:

Classic styling, comfortable touring, powerful V-twin performance, customizable platform

Manual Value Proposition:

Empowers owners to perform factory-quality maintenance and repairs, saving costs and ensuring longevity and optimal performance.

📋 Manual Details

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

Digital (likely PDF, implied by description)

Estimated Page Count:

Approximately 800-1000 pages (typical for Harley factory service manuals)

📖 Manual Coverage

Engine Systems:

Engine disassembly, assembly, inspection, lubrication, cooling, fuel system, ignition system, starting system, charging system, exhaust system

Transmission Drivetrain:

Clutch, transmission disassembly, assembly, inspection, primary drive, final drive, lubrication

Chassis Systems:

Frame, suspension (front and rear), steering, wheels, tires, brakes (front and rear), ABS (if equipped)

Electrical Systems:

Wiring diagrams, lighting, instrumentation, switches, relays, fuses, battery, starter, alternator, ignition, EFI components, security system

Bodywork Accessories:

Fairing, windshield, saddlebags, fuel tank, fenders, seat, handlebars, controls, instrumentation, lighting components, exterior trim

Maintenance Procedures:

Scheduled maintenance, oil changes, filter replacements, fluid checks and changes, brake pad replacement, tire rotation/replacement, chain/belt adjustment (if applicable), spark plug service, battery maintenance

Repair Procedures:

Engine rebuild, transmission overhaul, brake caliper rebuild, suspension component replacement, electrical component diagnosis and replacement, fuel injector service, clutch adjustment and replacement

Troubleshooting Diagnostics:

Fault finding, diagnostic charts, error code interpretation, common issue resolution, performance tuning guidance

Depth Of Coverage:

Comprehensive factory-level detail, suitable for professional technicians and experienced DIY mechanics, including detailed torque specifications, special tool requirements, and step-by-step repair instructions.

📊 Manual Specifications

File Type:

PDF (assumed digital format)

Searchable Text:

Yes (typical for factory digital manuals)

Printable:

Yes (individual pages or sections printable)

Diagram Quality:

High-quality, detailed diagrams and illustrations

Text Clarity:

Easy-to-read text sections

Binding:

N/A (digital format, but physical manuals are typically spiral-bound or hardback)

Paper Quality:

N/A (digital format, but physical manuals use durable paper stock)

⚙️ Engine Specifications

Engine Family:

Twin Cam 103 (High Output)

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

103 cubic inches (1690 cc)

Bore X Stroke:

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

Compression Ratio:

9.6:1

Valve Train:

Pushrod-actuated, overhead valves with hydraulic, self-adjusting lifters

Horsepower Rating:

Approx. 75-80 HP (at crankshaft, actual varies)

Torque Rating:

Approx. 101 ft-lbs (137 Nm) @ 3250 RPM (rated)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Premium unleaded gasoline, 91 octane or higher recommended

Oil Type:

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

Ignition System:

High-performance, electronic ignition with individual spark plugs per cylinder

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Gear Ratios:

1st: 9.593, 2nd: 6.650, 3rd: 4.934, 4th: 3.854, 5th: 3.178, 6th: 2.790

Clutch Type:

Hydraulic, multi-plate wet clutch

Primary Drive:

Compensating sprocket, chain drive

Optional Transmission:

N/A (standard 6-speed for this model/year)

Transmission Fluid:

Harley-Davidson Formula+ or equivalent HD transmission lubricant

📐 Dimensions

Length:

94.5 in. (2400 mm)

Width:

35.9 in. (912 mm)

Height:

53.5 in. (1360 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 Gvwr:

1220 lbs (553 kg)

Saddlebag Capacity:

Approx. 2.2 cu ft total

Front Tire:

BW 130/90B16 67H

Rear Tire:

BW 150/80B16 77H

Front Wheel:

16-inch diameter, chrome-laced steel

Rear Wheel:

16-inch diameter, chrome-laced steel

Fuel Tank Capacity:

6.0 gallons (22.7 liters)

Fuel Capacity Reserve:

Approx. 1.0 gallon

🛡️ Safety Features

ABS Availability:

Optional, Anti-lock Braking System (ABS) available

Braking System:

Hydraulic disc brakes, front and rear. Dual front discs, single rear disc.

Headlight Type:

Halogen headlight, auxiliary passing lamps

Security System:

Factory-installed security system with immobilizer and key fob

Lighting:

Full LED lighting package (tail/brake lights, turn signals, passing lamps) standard on many 2015 models.

💡 Technology Features

Audio System:

Premium Boom! Box 6.5 GT infotainment system with touchscreen, AM/FM/Weather Band, USB connection, Bluetooth, and optional GPS navigation.

Speaker System:

Integrated fairing speakers, often with rear speakers depending on specific trim/options.

ABS:

Optional Anti-lock Braking System (ABS) enhances braking control.

Cruise Control:

Electronic cruise control standard on FLHR models.

Bluetooth Connectivity:

Standard for audio streaming and hands-free calling with compatible devices.

Gauge Cluster:

Analog speedometer and tachometer, with integrated digital readouts for fuel level, gear indicator, clock, trip meters, and diagnostic codes.

🔧 Maintenance

Initial Service:

First service typically at 1,000 miles (1600 km): Oil change, primary lubricant change, chassis lubrication, inspection of all fasteners and controls.

Subsequent Oil Change:

Every 5,000 miles (8,000 km) or 6 months, whichever comes first.

Primary Chain Tensioner Inspection:

Inspect at 10,000 miles (16,000 km), replace if necessary (common wear item).

Spark Plug Replacement:

Typically at 10,000-15,000 miles (16,000-24,000 km) or as recommended by the manual.

Engine Oil Spec:

Harley-Davidson SYN3 SAE 20W50 or equivalent V-twin motorcycle oil (meeting HD-MS-1180 specification).

Transmission Fluid Spec:

Harley-Davidson Formula+ or equivalent HD transmission lubricant.

Primary Chain Case Lubricant:

Harley-Davidson Formula+ or equivalent HD primary lubricant.

Brake Fluid Type:

DOT 4 (specified for ABS and non-ABS systems, always verify with manual)

Primary Chain Tensioner Wear:

Automatic tensioner can wear out, leading to noise and potential damage if not replaced. Manual covers inspection and replacement.

Cam Chain Tensioner Wear:

Hydraulic tensioners in earlier Twin Cam engines were prone to wear; revised designs and upgrades are available. Manual details inspection.

Oil Leaks:

Can occur at various seals (e.g., rocker boxes, primary cover) due to vibration and material aging. Manual provides gasket replacement procedures.

Idle Control Issues:

Idle air control (IAC) motor or throttle position sensor (TPS) can cause rough idle or stalling. Manual covers diagnostics.

📚 Vehicle History

Brand Legacy:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer known for its V-twin engines and cruiser/touring motorcycles.

Road King Introduction:

The Road King lineage dates back to the 1940s, evolving into the modern touring platform with the introduction of the FLHR in the early 1990s.

2015 Model Updates:

The 2015 models saw a significant update with the introduction of the Twin Cam 103 High Output engine across most touring models and refinements to the chassis and suspension.

Manufacturing Location:

York, Pennsylvania, USA and Milwaukee, Wisconsin, USA

🏆 Awards & Recognition

Model Reputation:

Consistently recognized for its classic styling, comfortable ride, and touring capability within the cruiser segment.

Brand Awards:

Harley-Davidson frequently receives accolades for brand loyalty and product quality.