🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLHRC

Model Variant:

Road King Classic

Year:

2006

Covered Models:

FLHX Street Glide, FLHT Electra Glide Standard, FLHTC Electra Glide Classic, FLHTCU Electra Glide Ultra Classic, FLTR Road Glide

Engine Code:

Twin Cam 96 (1584cc)

Chassis Codes:

FLH chassis platform

👋 Introduction

Market Position:

Harley-Davidson's Touring platform, specifically the Road King Classic and its related models, represents the pinnacle of cruiser comfort and long-distance touring capability in the American motorcycle market. These models cater to riders seeking a blend of classic styling, powerful performance, and the ability to cover significant distances in comfort.

Competitive Analysis:

Competes with other large-displacement cruiser motorcycles from manufacturers like Indian Motorcycles, as well as touring-oriented models from Japanese manufacturers that offer a different philosophy but similar functionality. Harley-Davidson's strong brand heritage and distinctive V-twin character are key differentiators.

Key Features:

The 2006 FLHRC and associated Touring models are characterized by their large-displacement V-twin engines, comfortable riding positions, extensive luggage capacity (saddlebags and tour packs), advanced touring features (windshields, audio systems on some trims), and classic styling cues like chrome accents and leather-wrapped saddlebags (on the Classic).

📋 Manual Details

Systems Covered:

Engine mechanical, Engine electrical, Fuel system, Ignition system, Lubrication system, Cooling system (if applicable, though typically air-cooled for this model), Exhaust system, Transmission, Clutch, Drivetrain, Chassis, Frame, Suspension (front and rear), Brakes (front and rear), Electrical system (wiring, lighting, starting, charging), Fuel injection, Carburetion (if applicable for variants), Bodywork, Fairings, Seats, Controls, Instruments, Diagnostics, Troubleshooting

Page Count:

Approximately 800+ pages (typical for comprehensive Harley-Davidson service manuals)

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Printed

📖 Manual Coverage

Engine Mechanical:

Detailed disassembly, inspection, repair, and reassembly of all engine components including cylinders, pistons, crankshaft, camshafts, valves, timing, oil pump, and more.

Engine Electrical:

Wiring diagrams, troubleshooting electrical faults, component testing (ignition module, stator, regulator/rectifier, starter, battery, charging system).

Fuel System:

Fuel pump, fuel injectors, fuel lines, fuel filter, throttle body assembly, idle air control (IAC) for EFI models; carburetor overhaul and adjustment for carbureted variants if applicable to specific covered models.

Transmission Drivetrain:

Clutch operation, primary drive, transmission gear sets, shift mechanism, final drive belt inspection and adjustment, wheel bearings.

Chassis Suspension Brakes:

Frame inspection, steering head bearing service, front fork overhaul (fluid change, seal replacement), rear shock absorber service, brake caliper and master cylinder rebuild, brake fluid flush and bleeding, ABS troubleshooting (if equipped).

Maintenance:

Scheduled maintenance intervals, oil and filter changes, air filter replacement, spark plug replacement, brake pad inspection/replacement, tire inspection/replacement, drive belt adjustment/replacement, battery maintenance.

Troubleshooting:

Systematic diagnostic procedures for common and uncommon issues, fault code interpretation (if applicable for EFI models), electrical troubleshooting charts.

Repair Rebuild:

Complete procedures for engine rebuilds, transmission overhaul, suspension fork rebuilds, brake system repairs, electrical component replacement.

Adjustments:

Carburetor idle speed and mixture adjustment, clutch cable adjustment, throttle cable adjustment, primary chain tension adjustment, suspension preload adjustment.

Technical Depth:

Comprehensive. Covers everything from basic owner maintenance checks to full engine and transmission rebuilds, including detailed torque specifications, clearances, and diagnostic procedures.

📊 Manual Specifications

File Format:

Printed Book

Print Quality:

High-quality paper stock, clear diagrams and text, durable binding.

Binding Type:

Spiral-bound or perfect-bound for lay-flat use in a workshop environment.

Paper Type:

Heavyweight, durable paper suitable for shop use and resistance to grease and oil.

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

96 cubic inches (1584 cc)

Bore X Stroke:

3.75 in. x 4.38 in. (95.25 mm x 111.25 mm)

Compression Ratio:

8.9:1

Valve Train:

Overhead valves (OHV), 2 valves per cylinder

Camshafts:

Hydraulic lifters, pushrod-actuated valves

Horsepower:

Estimated 70-75 HP (at crank, depending on specific tuning and exhaust)

Torque:

Approximately 90-95 ft-lbs @ 3200 RPM (at crank)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI) on most 2006 models, potentially carburetor on some early or specific regional variants not explicitly excluded by product description.

Fuel Type:

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

Oil Type:

Harley-Davidson recommends Screamin' Eagle SYN3 (20W-50) or equivalent V-twin specific oil.

Oil Capacity:

4.0 US quarts (3.8 L) with filter change

🔧 Transmission

Transmission Type:

6-speed Cruise Drive

Gear Ratios:

1st: 9.59:1, 2nd: 6.65:1, 3rd: 4.94:1, 4th: 3.81:1, 5th: 3.14:1, 6th: 2.79:1

Clutch Type:

Wet, multi-plate, diaphragm spring

Primary Drive:

Gear drive, 1.333:1 ratio

Final Drive:

Belt drive, 32/66 tooth ratio (2.06:1)

Transmission Fluid:

Harley-Davidson Formula + Transmission & Primary Chaincase Lube or equivalent.

📐 Dimensions

Length:

Approx. 93.1 in. (2365 mm)

Width:

Approx. 38.0 in. (965 mm)

Height:

Approx. 57.2 in. (1453 mm)

Wheelbase:

Approx. 63.5 in. (1613 mm)

Ground Clearance:

Approx. 5.1 in. (130 mm)

Saddlebag Capacity:

Leather-wrapped hard saddlebags, approximately 2.2 cu ft total.

Dry Weight:

Approx. 700 lbs (318 kg) (varies by model and equipment)

Gross Vehicle Weight Rating:

Typically around 1200-1300 lbs (544-590 kg)

Fuel Capacity:

5.0 US gallons (19 L)

🛡️ Safety Features

Safety Ratings:

Motorcycles are not rated by agencies like NHTSA in the same manner as cars. Safety is determined by design, rider skill, and adherence to maintenance.

Active Features:

Hydraulic disc brakes front and rear, linked braking system (on some models), responsive steering, stable chassis, large tires for grip.

ABS:

Optional Anti-lock Braking System (ABS) available on some 2006 Touring models.

Passive Features:

Sturdy frame construction, passenger grab handles, rider floorboards, fairing for wind protection, integrated lighting (headlight, tail light, turn signals).

💡 Technology Features

Infotainment System:

Many 2006 Touring models featured an AM/FM/WB stereo system, often with CB/Intercom capability and CD player integration, controlled via handlebar-mounted switches. Audio quality and features varied by specific sub-model (e.g., Ultra Classic typically had more features).

Driver Assistance:

ABS was an optional electronic rider aid. Cruise control was also an option on many Touring models, operated via handlebar controls.

Connectivity:

Limited by modern standards. Primarily focused on audio system integration and communication features (CB/Intercom on higher trims). No Bluetooth or smartphone integration.

Instrumentation:

Analog speedometer and tachometer, fuel gauge, voltage meter, oil pressure indicator, and various warning lights. Some models featured a large display for infotainment and trip computer functions.

🔧 Maintenance

Initial Service:

First service typically around 1,000 miles (1600 km): oil change, primary chain adjustment, clutch inspection, general inspection.

Regular Maintenance:

Oil and filter change every 5,000 miles (8,000 km) or annually. Air filter cleaning/replacement every 10,000 miles (16,000 km). Spark plugs every 20,000 miles (32,000 km). Drive belt inspection/adjustment every 10,000 miles (16,000 km).

Brake Fluid Flush:

Recommended every 2 years or 24,000 miles (38,000 km).

Engine Oil:

20W-50 Harley-Davidson SYN3 or equivalent, API CI-4 rated.

Primary Chaincase Oil:

Harley-Davidson Formula + Transmission & Primary Chaincase Lube.

Transmission Oil:

Harley-Davidson Formula + Transmission & Primary Chaincase Lube.

Brake Fluid:

DOT 4, compatible with ABS systems if equipped.

Fork Oil:

Typically Harley-Davidson Genuine Fork Oil (Light) or a compatible equivalent, depending on desired damping characteristics and model specification.

Known Issues Common Checks:

Primary chain tensioner wear (especially early hydraulic tensioners), exhaust header pipe leaks, occasional issues with crank position sensors, potential for regulator/rectifier failure, cam chain tensioner upgrade (often addressed in later models or aftermarket). This manual will guide in diagnosing and rectifying these.

Engine Mounts:

Inspection and potential replacement of rubber engine mounts which can degrade over time, affecting vibration isolation.

Electrical Connectors:

Corrosion or loose connections in electrical connectors, particularly in exposed areas, requiring inspection and cleaning.

📚 Vehicle History

Brand Heritage:

Harley-Davidson boasts a rich heritage dating back to 1903, synonymous with American motorcycle culture, freedom, and individuality. The brand has a long history of producing large-displacement V-twin engines and touring-focused motorcycles.

Model Evolution:

The FLH platform has evolved significantly over decades. The 2006 models represent the integration of the Twin Cam 96 engine and the 6-speed Cruise Drive transmission, a major update for the Touring line. The Road King Classic specifically adds classic styling elements like wire-spoke wheels and leather-wrapped saddlebags to the established Touring platform.

Production Era:

The Twin Cam 96 engine was introduced in 2007 as standard, but 2006 saw the transition with some models getting the 88 cu. in. and others the new 96 cu. in. engine. This manual specifically covers the 2006 models which were often equipped with the 96ci engine, marking a pivotal year.

Manufacturing Location:

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

🏆 Awards & Recognition

Recognitions:

Harley-Davidson motorcycles, particularly the Touring line, have consistently been recognized for their style, comfort, and long-distance touring capability. While specific awards for the 2006 models are not typically highlighted in individual years, the platform has received accolades for its enduring appeal and design over many years.

Owner Satisfaction:

Harley-Davidson generally enjoys high owner satisfaction, driven by brand loyalty and the unique riding experience.

Certifications:

All Harley-Davidson motorcycles sold in major markets comply with relevant emissions and safety standards for their respective years.