Segment:
Cruiser Motorcycle
Target Audience:
Harley-Davidson owners seeking to perform maintenance, repairs, or modifications
Value Proposition:
Offers authoritative, factory-backed information for DIY repairs, reducing reliance on dealerships.
Detail Level:
Step-by-step instructions, detailed diagrams, and comprehensive specifications
Powertrain:
Engine, Transmission, Final Drive
Chassis:
Frame, Suspension (Front & Rear), Steering, Wheels, Tires
Electrical:
Ignition System, Charging System, Starting System, Lighting, Gauges, Horn, Battery
Braking:
Front & Rear Brake Systems (Hydraulic), Brake Fluid
Fuel System:
Fuel Tank, Fuel Lines, Fuel Pump, Fuel Injection (EFI) System, Carburetor (if applicable to specific sub-models/regions, though 2006 FXDC is typically EFI)
Exhaust:
Exhaust System Components, Mufflers
Bodywork And Trim:
Fenders, Tank, Seat, Handlebars, Controls, Fairings (if equipped)
Routine Maintenance:
Oil Change, Filter Replacement, Spark Plug Service, Air Filter Cleaning/Replacement, Chain Adjustment/Lubrication (if applicable, though most Dynas used belt drive), Brake Pad Inspection/Replacement
Troubleshooting:
Diagnostic Codes (DTCs), Symptom-based Troubleshooting Guides
Repair And Rebuild:
Engine Top-End Rebuild, Transmission Overhaul, Fork Seal Replacement, Brake Caliper Rebuild, Electrical Component Diagnosis and Replacement
Specifications And Data:
Torque Specifications, Clearances, Fluid Capacities, Wiring Diagrams, Component Locations
Depth:
Complete Factory Level - From basic checks to full engine and transmission rebuilds
Engine Type:
Air-cooled, Twin Cam 88
Displacement:
1450cc (88 cubic inches)
Bore X Stroke:
3.75 in. x 4.00 in. (95.25 mm x 101.6 mm)
Valvetrain:
Overhead Valves (OHV), 2 valves per cylinder
Timing System:
Camshaft driven by chain and tensioner system
Horsepower Estimate:
~65-70 HP (at crank, estimated)
Torque Estimate:
~75-80 lb-ft (at crank, estimated)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded Gasoline, Minimum 87 Octane
Cooling Method:
Air-cooled
Oil Type Specification:
Harley-Davidson Syn3 (or equivalent API SG certified, SAE 20W50)
Engine Oil Capacity:
3.0 US quarts (2.8 liters) with filter change
Type:
5-Speed Constant Mesh
Gear Ratios:
1st: 9.315, 2nd: 6.454, 3rd: 4.778, 4th: 3.798, 5th: 3.158 (typical ratios, may vary slightly)
Clutch:
Multi-plate, wet, diaphragm spring
Final Drive:
Belt Drive (49-tooth pulley, 32-tooth sprocket, 133-tooth belt)
Transmission Fluid:
Harley-Davidson Formula + (or equivalent SAE 80W-90 Gear Oil)
Transmission Fluid Capacity:
24 US fluid ounces (0.71 liters)
Length:
90.5 in. (2299 mm)
Width Handlebars:
37.6 in. (955 mm)
Height:
49.8 in. (1265 mm)
Wheelbase:
63.5 in. (1613 mm)
Dry Weight:
628 lbs (285 kg)
Gross Vehicle Weight Rating Gvwr:
1050 lbs (476 kg)
Payload Capacity:
422 lbs (191 kg)
Fuel Tank Capacity:
5.0 US gallons (18.9 liters)
Oil Capacity:
3.0 US quarts (2.8 liters) with filter
Front Tire:
100/90-19 57H
Front Wheel:
19-inch (Chrome laced spokes)
Rear Wheel:
16-inch (Chrome laced spokes)
Seat Height Laden:
26.1 in. (663 mm)
Ground Clearance:
4.7 in. (119 mm)
Crash Safety Ratings:
N/A (Motorcycle industry does not have standardized crash ratings like automobiles)
Braking System:
Dual Disc Front Brakes, Single Disc Rear Brake
Lighting:
Headlight, Tail Light, Brake Light, Turn Signals
Frame Construction:
Steel, Triangulated Frame
Handlebars:
Wide handlebars for leverage and control
Audio System:
Optional factory radio and speaker system available on some models, not standard on all FXDC variants.
Display:
Analog speedometer, tachometer, fuel gauge, voltage meter, oil pressure light.
ABS:
Anti-lock Braking System (ABS) was an optional feature for the 2006 Dyna models.
Diagnostic Interface:
Proprietary diagnostic connector for use with Harley-Davidson digital technician tools.
Initial Service:
1,000 miles (1,600 km)
Subsequent Oil Change:
Every 5,000 miles (8,000 km) or 12 months, whichever comes first
Primary Chain Tensioner Inspection:
Every 10,000 miles (16,000 km)
Belt Tension Check:
Every 5,000 miles (8,000 km) or as needed
Engine Oil:
Harley-Davidson Syn3 (or SAE 20W50 API SG)
Transmission Oil:
Harley-Davidson Formula + (or SAE 80W-90 Gear Oil)
Primary Chain Case Oil:
Harley-Davidson Formula + (or SAE 80W-90 Gear Oil)
Fork Oil:
Harley-Davidson Type E (or equivalent SAE 15W)
Primary Chain Tensioner:
Early Twin Cam models (including some from 2006) were known for hydraulic tensioners that could wear and fail, leading to noise or damage. Upgraded aftermarket tensioners or automatic tensioners are common solutions.
Cam Chain Tensioners:
Similar to primary tensioners, the cam chain tensioners can wear. The manual will detail inspection and replacement procedures.
Oil Leaks:
Common wear points like rocker box gaskets, primary cover gasket, and transmission side cover can develop leaks over time. The manual provides procedures for proper sealing.
Spark Plugs:
Harley-Davidson recommended spark plugs, check and gap at 10,000 miles. Torque spec: 15-20 lb-ft.
Air Filter:
Inspect at 5,000 miles, clean or replace as needed.
Manufacturer:
Harley-Davidson Motor Company
Dyna Series Introduction:
The Dyna platform was introduced in 1991, evolving from the FXR models. The FXDC designation became prominent for custom-styled Dyna models.
Twin Cam Engine Introduction:
The Twin Cam 88 engine was introduced in 1999, replacing the Evolution engine, and became standard across most Harley-Davidson Big Twin models, including the Dyna series.
Manufacturing Location:
United States (Various Harley-Davidson facilities)