🏷️ Basic Information

Make:

Harley-Davidson

Model:

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

Year:

2006

Model Code Group:

FLT/FLHT Family

👋 Introduction

Segment:

Full-size touring motorcycles (Bagger and Classic Touring)

Target Audience:

Harley-Davidson owners and independent service technicians specializing in Harley-Davidson motorcycles.

Key Competitors 2006:

Honda Gold Wing, Indian Chief, Victory Vision (though Victory was newer to market then), various European touring bikes.

Powertrain:

Iconic Harley-Davidson Twin Cam 96 engine, known for its torque and distinctive V-twin character.

Touring Amenities:

Spacious fairings, large saddlebags, comfortable seating positions designed for long-distance travel.

Customization Potential:

Harley-Davidson platform renowned for extensive aftermarket support and customization options.

📋 Manual Details

Engine Coverage:

Twin Cam 96 (1584cc)

Transmission Coverage:

6-speed Cruise Drive

Chassis Coverage:

Frame, suspension (front and rear), wheels, tires, brakes

Electrical Coverage:

Wiring diagrams, lighting, ignition, charging system, fuel injection, instrumentation, audio system

Bodywork Coverage:

Fairings, saddlebags, fuel tank, seat, fenders

Estimated Pages:

Approximately 600-800 pages (typical for this model year and comprehensive coverage)

Type:

Factory Service Manual / Workshop Manual

Language:

English

Format:

Downloadable PDF

📖 Manual Coverage

Engine Mechanical:

Disassembly, inspection, assembly, torque specifications, valve adjustments, piston and ring replacement, cylinder head service

Fuel System:

Fuel pump, fuel injectors, fuel filter, throttle body, EFI diagnostics

Ignition System:

Spark plugs, ignition coils, crankshaft position sensor, camshaft position sensor, ignition timing

Cooling System:

Note: Air-cooled engine, no coolant system to service.

Transmission Mechanical:

Clutch operation, gearshift mechanism, internal transmission components, bearing service, lubrication

Brake System:

Front and rear hydraulic disc brakes, brake fluid flush and bleed, caliper service, master cylinder service, rotor replacement

Suspension System:

Front fork service (oil change, seal replacement), rear shock absorber service and replacement

Electrical System Troubleshooting:

Diagnosis of electrical faults, wiring harness inspection, component testing

Charging System:

Stator, regulator/rectifier, battery service, charging system testing

Lighting System:

Headlight, taillight, turn signals, brake lights, accessory lighting

Audio System:

Radio, speakers, amplifier (if equipped), antenna

Chassis And Frame:

Frame inspection, steering head bearing service, swingarm and pivot bearing service

Wheels And Tires:

Tire inspection and replacement, wheel bearing service, wheel balancing

Routine Maintenance:

Oil changes, filter replacements, air filter service, spark plug replacement, brake inspection

Troubleshooting Diagnostics:

Diagnostic trouble codes (DTCs), symptom-based troubleshooting charts

Engine Repair:

Complete engine rebuild procedures, piston ring gap setting, connecting rod alignment

Transmission Repair:

Gearbox disassembly and reassembly, clutch pack replacement, troubleshooting shifting issues

Brake System Service:

Brake pad replacement, rotor resurfacing/replacement, hydraulic system bleeding

Suspension Overhaul:

Front fork seal replacement, rear shock absorber adjustment and replacement

Electrical Component Replacement:

Starter motor, alternator (stator), regulator/rectifier, battery replacement

Body Panel Removal Installation:

Fairing removal, saddlebag detachment, fender installation

Fuel System Cleaning And Adjustment:

Throttle body cleaning, fuel injector cleaning (external)

Depth:

Comprehensive; covers basic maintenance to full engine and transmission rebuilds, including detailed troubleshooting and electrical diagnostics.

📊 Manual Specifications

File Type:

PDF

Searchability:

Typically searchable text within the PDF

Quality:

High-resolution, clear text and diagrams

Binding:

Not applicable for PDF download (digital format)

Paper:

Not applicable for PDF download (digital format)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

1584 cc (96 cubic inches)

Bore X Stroke:

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

Compression Ratio:

8.8:1

Valve Train:

Overhead valve (OHV), 4 valves per cylinder (pushrod actuated)

Horsepower Estimated:

Approximately 70-75 HP (at crank, typical for 2006 Twin Cam 96)

Torque Estimated:

Approximately 90-95 lb-ft @ 3000 RPM (at crank, typical for 2006 Twin Cam 96)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, minimum 91 octane recommended

Oil Type:

Harley-Davidson 20W-50 SYN3 or equivalent V-twin specific synthetic oil

Oil Capacity:

4.0 US qt (3.8 L) with filter change

Oil Filter Part Number:

63796-77A (or equivalent aftermarket)

🔧 Transmission

Transmission Type:

6-speed Cruise Drive, constant mesh

Clutch Type:

Wet, multi-plate

Gear Ratios:

1st: 9.31; 2nd: 6.45; 3rd: 4.77; 4th: 3.77; 5th: 3.06; 6th: 2.40 (Approximate ratios for 6-speed Cruise Drive)

Transmission Fluid Type:

Harley-Davidson Formula + Transmission and Primary Chaincase Lubricant or equivalent

Transmission Fluid Capacity:

24 US fl oz (0.71 L)

📐 Dimensions

Wheelbase:

Approx. 63.2 inches (1605 mm)

Length:

Approx. 93.5 inches (2375 mm)

Seat Height:

Approx. 29.5 inches (750 mm) (unladen)

Ground Clearance:

Approx. 5.1 inches (130 mm)

Saddlebag Capacity:

Approx. 2.2 cu ft total

Dry Weight:

Approx. 700-750 lbs (318-340 kg) depending on model

Gross Vehicle Weight Rating Gvwr:

Approx. 1200 lbs (544 kg)

🛡️ Safety Features

Crash Test Ratings:

Not applicable to motorcycles in the same way as automobiles.

Brakes:

Dual-disc front brakes, single-disc rear brake with hydraulic actuation.

Lighting:

Headlight, taillight, brake light, front and rear turn signals for visibility.

Frame Construction:

Steel frame and swingarm designed for stability.

Ergonomics:

Designed for rider comfort and control over long distances.

💡 Technology Features

Audio System:

Factory-installed AM/FM/WB radio with cassette and CD player (optional on some models), speaker systems integrated into fairings and tour packs.

Cruise Control:

Standard on most touring models (FLHT, FLHTC, FLHTCU, FLTR). Available as an accessory for others.

Diagnostic Ports:

Proprietary diagnostic connector for Electronic Control Module (ECM) communication.

🔧 Maintenance

Engine Oil Change:

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

Primary Chaincase Oil Change:

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

Transmission Oil Change:

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

Air Filter Inspection:

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

Spark Plug Replacement:

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

Brake Fluid Flush Bleed:

Every 24 months (regardless of mileage).

Front Fork Oil Change:

Every 20,000 miles (32,000 km) or 48 months.

Engine Oil Viscosity:

20W-50

Primary Chaincase Lubricant:

Harley-Davidson Formula + or equivalent

Transmission Lubricant:

Harley-Davidson Formula + or equivalent

Brake Fluid Type:

DOT 4 (DOT 5.1 if specified for improved performance, but DOT 4 is standard).

Cam Chain Tensioner Wear:

Early Twin Cam engines (prior to some 2006 updates) experienced wear on the cam chain tensioner shoes. The manual will cover inspection and replacement procedures.

Crankshaft Position Sensor:

Can be prone to failure, leading to no-start conditions. Manual covers testing and replacement.

Voltage Regulator:

Can fail, leading to charging system issues. Manual covers testing and replacement.

Harley Davidson Specific Diagnostics:

The manual will detail the use of diagnostic tools like the HD-EST (Electronic Suspension Tester) or similar for troubleshooting EFI and electrical systems.

📚 Vehicle History

Brand Origin:

Founded in Milwaukee, Wisconsin, USA, in 1903. A storied history of American motorcycle manufacturing.

Flt Platform Introduction:

The FLT/FLHT platform, predecessor to the models covered, was introduced in 1979 with a rubber-mounted engine for improved vibration isolation.

Twin Cam Introduction:

The Twin Cam 88 engine was introduced in 1999, followed by the Twin Cam 96 in 2007. The 2006 model year represents the tail end of the Twin Cam 88 era for some models, but the product title specifically mentions FLHX/FLHT/FLHR/FLTR, which by 2006 would mostly feature the Twin Cam 96, or the transition to it.

Model Differences 2006:

FLHX Street Glide (fairing, saddlebags, lower profile), FLHT Electra Glide Standard (basic touring), FLHTCU Electra Glide Ultra Classic (full touring package with fairing lowers, trunk, premium amenities), FLHR Road King (classic styling, no fairing, removable windshield), FLTR Road Glide (frame-mounted fairing for improved handling).

Manufacturing Location:

Primary assembly in York, Pennsylvania, USA.

🏆 Awards & Recognition

Harley Davidson Reputation:

Harley-Davidson motorcycles, particularly the touring models, are recognized for their build quality, iconic styling, and long-distance comfort, maintaining strong resale value and brand loyalty.