Positioning:
The 2008 Harley-Davidson Dyna models represented a significant evolution in the iconic Dyna line, blending classic styling with modern performance and technology. This manual is targeted at owners and independent repair shops seeking to maintain and repair these popular V-twin cruisers.
Competition:
Competed against models from Indian Motorcycle, Victory Motorcycles, and custom motorcycle builders, as well as other cruiser brands offering different engine configurations and styling.
Features:
The 2008 Dyna platform featured the robust Twin Cam 96 engine, 6-speed Cruise Drive transmission, and a chassis designed for responsive handling. The introduction of electronic fuel injection (EFI) improved performance and emissions. Different sub-models offered distinct styling cues, from minimalist Super Glides to the more customized Fat Bob and Wide Glide variants.
Model Variant Coverage:
All 2008 Harley-Davidson Dyna models including FXD (Super Glide), FXDC (Custom), FXDF (Fat Bob), FXDL (Low Rider), FXDWG (Wide Glide)
Estimated Page Count:
Approximately 600-800 pages (typical for comprehensive WSM)
Type:
Factory Service Manual (WSM - Work Service Manual) / Repair Manual
Format:
Digital Download (likely PDF)
Engine:
Twin Cam 96 engine (disassembly, assembly, inspection, lubrication, cooling, timing, fuel system, ignition system, exhaust system)
Transmission:
6-speed Cruise Drive transmission (disassembly, assembly, maintenance, troubleshooting, lubrication)
Drivetrain:
Primary drive, clutch, final drive belt, rear wheel installation, drive sprocket maintenance
Chassis:
Frame, front suspension (forks, steering head), rear suspension (shock absorbers, swingarm), wheels, tires, brakes (front and rear calipers, master cylinders, lines, ABS if equipped)
Electrical:
Battery, charging system (stator, regulator/rectifier), ignition system, lighting (headlight, tail light, turn signals), starter system, instruments, diagnostics (DTC codes), wiring diagrams, ECM (Engine Control Module) and sensors
Fuel System:
Fuel injection system (EFI - Electronic Fuel Injection), fuel pump, fuel injectors, throttle body, fuel lines, fuel tank
Bodywork:
Fenders, fuel tank, seat, handlebars, controls, fairings (if applicable), saddlebags (if applicable), instrument panel
Maintenance:
Routine service, oil changes, filter replacement, lubrication points, tire pressure, brake pad inspection, belt tension adjustment
Troubleshooting:
Diagnostic procedures for common problems, fault code lookup and interpretation, component testing
Repair:
Step-by-step instructions for disassembly, repair, reassembly, and adjustment of all major components and systems
Installation:
Instructions for installing factory and common aftermarket accessories, component replacement procedures
Depth:
Comprehensive (covers everything from basic maintenance to full engine and transmission rebuilds, including detailed torque specifications and diagnostic procedures)
Engine Type:
Air-cooled, Twin Cam 96 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)
Horsepower:
Approx. 70-75 HP (at rear wheel, varies by model and tuning)
Torque:
Approx. 90-95 ft-lbs (at rear wheel, varies by model and tuning)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane
Oil Type:
Harley-Davidson SYN3 Synthetic Motorcycle Oil or equivalent premium synthetic V-twin motorcycle oil (e.g., 20W-50)
Oil Capacity:
Approximately 3.0 US quarts (2.8 liters) with filter change
Ignition System:
Coil-on-plug, electronic ignition
Type:
6-speed Cruise Drive Manual
Optional Features:
N/A (6-speed was standard across the Dyna line for 2008)
Gear Ratios:
1st: 9.315, 2nd: 6.424, 3rd: 4.775, 4th: 3.753, 5th: 3.150, 6th: 2.790 (approximate, check manual for exact ratios)
Transmission Fluid Type:
Harley-Davidson Formula+ Transmission & Primary Chaincase Lubricant or HD Syn3 Gear Oil, or equivalent V-twin transmission fluid
Transmission Fluid Capacity:
Approximately 28 US fl oz (0.83 L)
Wheelbase:
Approximately 64.5 - 66.2 inches (1638 - 1681 mm) depending on model
Seat Height:
Approximately 26.5 - 27.2 inches (673 - 691 mm) depending on model and suspension
Dry Weight:
Approximately 630 - 660 lbs (286 - 299 kg) depending on model
Gross Vehicle Weight Rating:
Approximately 1000 - 1030 lbs (454 - 467 kg) depending on model
Fuel Capacity:
Approximately 4.0 - 5.0 US gallons (15.1 - 18.9 liters) depending on fuel tank size and model
Safety Standards:
Complies with relevant US DOT and EPA standards. Specific crash test ratings are not typically issued for motorcycles in the same manner as automobiles.
Braking System:
Hydraulic disc brakes front and rear. Optional ABS (Anti-lock Braking System) was available on some models.
Lighting:
Halogen headlight, LED tail light and brake light, amber turn signals.
Frame Construction:
Steel frame and swingarm designed for stability and handling.
Instrumentation:
Analog speedometer with integrated digital odometer, tachometer (on some models), fuel gauge, oil pressure indicator, turn signal indicators, and warning lights. Security system fob indicator.
ABS:
Optional Anti-lock Braking System (ABS) available on certain 2008 Dyna models.
Diagnostics:
On-board diagnostics with the ability to retrieve Diagnostic Trouble Codes (DTCs) via the odometer display or a diagnostic tool (like a Harley-Davidson Dealer Diagnostic System - HDDDS).
ECU:
Engine Control Module (ECM) managing fuel injection, ignition timing, and other engine parameters. Tuning capabilities through aftermarket devices are common.
Initial Service:
First service typically at 1,000 miles (1,600 km) - includes oil and filter change, primary chaincase oil, inspection of all critical components, and adjustments.
Subsequent Service:
Subsequent services generally every 5,000 miles (8,000 km) or annually, whichever comes first. This includes oil changes, inspection of spark plugs, brake system, tires, suspension, and drive belt.
Engine Oil Change Interval:
Every 5,000 miles (8,000 km) or 12 months.
Transmission Oil Change Interval:
Every 10,000 miles (16,000 km) or 24 months.
Primary Chaincase Oil Change Interval:
Every 5,000 miles (8,000 km) or 12 months, or at major service intervals.
Engine Oil Viscosity:
20W-50 (synthetic or conventional motorcycle specific)
Transmission Fluid Type:
Harley-Davidson Formula+ or equivalent V-twin transmission oil
Primary Chaincase Fluid Type:
Harley-Davidson Formula+ or equivalent primary chaincase lubricant
Common Issues:
Potential for primary compensator issues, exhaust system leaks, clutch adjustments, and charging system component failures (stator, regulator/rectifier). Rear brake pads can wear quickly under heavy use. Some owners report minor electrical gremlins. Fuel tank expansion on certain models.
Heritage:
Harley-Davidson, founded in 1903, is an American motorcycle manufacturer with a rich heritage of building V-twin motorcycles known for their distinctive sound, styling, and cruising performance.
Dynafamily Evolution:
The Dyna platform, introduced in 1991, bridged the gap between the Sportster and Big Twin families, offering a more modern ride with rubber-mounted engines for reduced vibration. The 2008 models benefited from the Twin Cam engine and 6-speed transmission, representing a mature iteration of the Dyna concept.
Manufacturing Location:
Primarily assembled in York, Pennsylvania, and Milwaukee, Wisconsin, USA.
