Chassis Code:
FLHTC/FLHTCI (Electra Glide Standard/Classic), FLHTCU/FLHTCU I (Electra Glide Ultra Classic), FLHRC/FLHRC I (Road King Classic), FLHRS/FLHRS I (Road King Custom), FLHR/FLHR I (Road King), FLHX/FLHXI (Street Glide), FLTR/FLTRI (Road Glide)
Target Audience:
Harley-Davidson Touring owners, independent repair shops, DIY enthusiasts seeking in-depth technical information.
Value Proposition:
Provides factory-level accuracy and detail for maintenance and repair, saving significant costs compared to dealership service.
Usability:
Step-by-step instructions, detailed exploded views, and comprehensive electrical diagrams enhance user comprehension and repair success rates.
Models Covered:
Road King, Road King Custom, Road Glide, Street Glide, Electra Glide Standard, Electra Glide Classic, Electra Glide Ultra Classic
Estimated Page Count:
~700-900 pages (typical for comprehensive service manuals of this era and scope)
Type:
Factory Service Manual & Electrical Diagnostic Manual
Powertrain:
Engine, Transmission, Clutch, Final Drive
Chassis:
Frame, Suspension (Front & Rear), Steering, Wheels, Tires, Brakes
Electrical:
Ignition, Starting System, Charging System, Lighting, Instruments, Accessories, Body Controller (BCM), EFI System Components, Cruise Control, Audio System
Maintenance:
Scheduled maintenance, oil changes, filter replacements, brake fluid flushes, lubrication, tire pressure checks
Diagnostics:
Troubleshooting guides for common issues, diagnostic codes, electrical system testing, component testing
Repair Overhaul:
Engine disassembly and reassembly, transmission servicing, brake caliper overhaul, suspension component replacement, wiring harness repair
Depth:
Comprehensive; covers basic to advanced repair and troubleshooting, including detailed electrical schematics and component-level diagnostics.
Engine Family:
Twin Cam 88 (in various displacements, primarily 1450cc / 88 cubic inches)
Engine Configuration:
Air-cooled, 45-degree V-twin
Bore X Stroke:
3.75 in. x 4.00 in. (95.25 mm x 101.6 mm)
Compression Ratio:
8.8:1 (typical for Twin Cam 88)
Horsepower Approx:
Approximately 65-70 HP (at crankshaft, model dependent)
Torque Approx:
Approximately 85-90 lb-ft (at crankshaft, model dependent)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI) - Harley-Davidson's Delphi-based system
Fuel Type:
Unleaded gasoline, minimum 87 octane (91 AKI recommended)
Ignition Type:
Distributorless Electronic Ignition (DS-EDR)
Type:
5-speed Cruise Drive constant mesh manual transmission
Transmission Options:
N/A (5-speed manual was standard across all 2006 Touring models)
Clutch Type:
Hydraulically actuated, multi-plate wet clutch
Final Drive:
Belt drive (49-tooth rear pulley, 32-tooth front pulley, 144-tooth belt)
Transmission Fluid:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (or equivalent API GL-4, SAE 80W-90 gear oil with sufficient EP additives)
Safety Features Standard:
Dual disc front brakes, single disc rear brake, integrated parking brake (on some models)
Brake System:
Front: Dual 32mm 4-piston calipers with 11.5 inch (292mm) rotors. Rear: 38mm 2-piston caliper with 11.5 inch (292mm) rotor.
Lighting:
Halogen headlight, auxiliary passing lamps (standard on Electra Glide models), LED taillight/brake light.
Audio System:
Many touring models featured a factory-installed AM/FM/WB radio with CB/Intercom and cassette player or CD player. The manual would cover operation, troubleshooting, and basic component replacement.
Cruise Control:
Electronic Cruise Control was a common feature on many 2006 Touring models. The manual would detail its operation, diagnostics, and potential repair procedures.
Diagnostics Interface:
The manual provides insight into the diagnostic capabilities, often requiring specialized Harley-Davidson diagnostic tools (like a Smart Stereo or Digital Technician) for advanced troubleshooting of EFI and other electronic systems.
First Service:
1,000 miles (1,600 km) or 12 months, whichever comes first.
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months, whichever comes first. Includes oil change, primary chaincase oil change, filter replacement, and general inspection.
Engine Oil:
Harley-Davidson Genuine Motor Oil (20W-50 Synthetic or Conventional, or equivalent API CI-4 PLUS rated diesel engine oil or JASO MA approved motorcycle oil)
Engine Oil Capacity:
3.5 US quarts (3.3 Liters) with filter change
Primary Chaincase Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant (or equivalent API GL-4, SAE 80W-90 gear oil)
Primary Chaincase Oil Capacity:
2.8 US quarts (2.6 Liters)
Brake Fluid:
DOT 4 brake fluid
Common Wear Items:
Clutch plates, wheel bearings, brake pads, fork seals, and the ignition coil are common wear items requiring periodic inspection and replacement.
Engine Performance Quirks:
Some Twin Cam 88 models experienced issues with oil pressure sending units, fuel injector sealing O-rings, and cam chain tensioner wear, particularly those with the early hydraulic tensioners. The manual would detail checks and replacements for these.
Spark Plugs:
Harley-Davidson OEM or equivalent (e.g., NGK DCPR5E)
Spark Plug Gap:
0.030 - 0.040 inches (0.76 - 1.02 mm)
Tire Pressure Front:
30-36 PSI (depending on tire and load, refer to owner's manual/sidewall)
Tire Pressure Rear:
32-40 PSI (depending on tire and load, refer to owner's manual/sidewall)
Engine Mounts:
Refer to manual for specific torque values for engine mounting bolts (e.g., ~30-40 ft-lbs for lower mounts).
Wheel Axles:
Front axle: ~30-40 ft-lbs. Rear axle: ~50-70 ft-lbs (refer to manual for precise values).
Manufacturer Origin:
United States, established 1903.
Touring Platform:
The 2006 Touring models represent the mature iteration of Harley-Davidson's large-displacement, V-twin cruiser platform, evolving from earlier Shovelhead and Evolution Big Twin designs. This era focused on comfort, long-distance touring capabilities, and integrating electronic features.
Production Period:
The Twin Cam 88 engine platform was introduced in 1999 and continued through 2006 for the 88 cubic inch variant before the introduction of the Twin Cam 96. The 2006 model year is significant as a transition year for some components.
