Target Audience:
Harley-Davidson Dyna owners, independent repair shops, and motorcycle enthusiasts seeking to perform maintenance and repairs.
Value Proposition:
Provides essential technical information for maintaining and repairing the 2008-2009 Dyna models, offering a cost-effective alternative to dealership service.
Content Focus:
Detailed step-by-step repair instructions, diagnostic procedures, and technical specifications.
Illustration Quality:
Typically includes detailed diagrams, schematics, and potentially photographic illustrations for clarity.
Engine Management:
Fuel injection, ignition system, engine mechanicals, exhaust system.
Powertrain:
Transmission, clutch, final drive, primary drive.
Chassis And Suspension:
Front fork assembly, rear shock absorbers, frame, wheels, steering.
Braking System:
Front and rear brakes, hydraulic lines, master cylinders, calipers.
Electrical System:
Battery, charging system, starter, lighting, instrumentation, ignition switch, wiring diagrams.
Bodywork And Fittings:
Fenders, fuel tank, seat, fairings (if applicable), handlebars, controls.
Diagnostics:
Troubleshooting guides, fault code diagnosis (for EFI models).
Routine Maintenance:
Oil changes, filter replacements, spark plug service, drive belt inspection/adjustment, brake fluid checks.
Engine Rebuild:
Top-end overhaul (cylinder head, pistons), bottom-end overhaul (crankshaft, bearings), timing procedures.
Transmission Repair:
Clutch adjustment and replacement, gearbox disassembly and reassembly, primary chain inspection.
Suspension Service:
Fork seal replacement, oil changes, shock absorber overhaul.
Brake System Repair:
Brake bleeding, pad replacement, caliper service, master cylinder rebuild.
Electrical Troubleshooting:
Wiring diagram interpretation, component testing, fault finding.
Fuel System Maintenance:
Fuel injector cleaning, fuel filter replacement, throttle body service.
Depth Of Coverage:
Detailed procedures for diagnostics, disassembly, assembly, and repair, suitable for experienced DIY mechanics and professional technicians.
Engine Type:
Air-cooled, Twin Cam 96 V-Twin
Engine Displacement:
96 cubic inches (1584 cc)
Bore X Stroke:
3.75 in x 4.38 in (95.25 mm x 111.25 mm)
Valve Train:
Pushrod actuated, overhead valves (OHV), 2 valves per cylinder.
Horsepower Estimated:
65-75 HP (approximate, varies by specific model and tuning)
Torque Estimated:
85-95 lb-ft (approximate, varies by specific model and tuning)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane recommended
Oil Type:
Harley-Davidson SYN3 Synthetic Motorcycle Oil or equivalent API SG, JASO MA rated petroleum or synthetic oil.
Oil Capacity:
3.5 US quarts (3.3 L) with filter change.
Transmission Type:
6-speed constant mesh
Clutch Type:
Wet, multi-plate, diaphragm spring
Primary Drive:
Chain, 34/46 ratio
Final Drive:
Belt, 32/65 ratio
Gear Ratios:
1st: 9.312, 2nd: 6.650, 3rd: 4.942, 4th: 3.875, 5th: 3.307, 6th: 2.790
Transmission Fluid Type:
Harley-Davidson Formula+ Transmission Fluid or equivalent API GL-4 rated gear oil.
Transmission Fluid Capacity:
2.7 US quarts (2.5 L)
Wheelbase:
Approximately 64.5 - 65.5 inches (1638 - 1664 mm), varies by specific Dyna model.
Seat Height:
Approximately 26.2 - 27.0 inches (665 - 686 mm), varies by specific Dyna model and suspension.
Dry Weight:
Approximately 600 - 640 lbs (272 - 290 kg), varies by specific Dyna model.
Gross Vehicle Weight Rating:
Typically around 1000 - 1050 lbs (454 - 476 kg)
Crash Safety:
Motorcycles are not rated by NCAP or NHTSA in the same way as cars. Safety relies on rider skill and design.
Braking System:
Dual-piston front caliper with 300mm disc, single-piston rear caliper with 292mm disc. Optional ABS available on some models.
Lighting:
Halogen headlight, LED taillight, turn signals.
Frame Construction:
Steel double-cradle frame.
Instrumentation:
Analog speedometer, tachometer, fuel gauge, oil pressure gauge, and indicator lamps. Some models may have a basic LCD display for odometer, trip meter, and clock.
Audio Systems:
Aftermarket audio systems are common; this manual would cover the electrical connections for factory accessory radios if equipped.
ABS:
Anti-lock Braking System (ABS) was an optional feature on many 2008-2009 Dyna models. The manual will detail its components and diagnostics.
Diagnostic Port:
Includes a diagnostic connector for use with Harley-Davidson's Digital Technician or compatible aftermarket scan tools for engine diagnostics and tuning.
First Service:
1,000 miles (1,600 km) or 1 month.
Subsequent Service:
Every 5,000 miles (8,000 km) or 6 months thereafter, with major service recommended at 20,000 miles (32,000 km).
Engine Oil Grade:
SAE 20W-50 (Harley-Davidson recommend SYN3 or equivalent).
Primary Chain Case Fluid:
Harley-Davidson Formula+ Transmission Fluid or equivalent.
Transmission Fluid Grade:
SAE 80W-90 GL-4 (Harley-Davidson Formula+).
Brake Fluid Type:
DOT 4 (for most models, check specific VIN for confirmation).
Cam Chain Tensioners:
Early Twin Cam engines (pre-2007) had plastic hydraulic tensioners prone to wear. 2007+ models use improved hydraulic tensioners, but monitoring is still advised. This manual will cover inspection and replacement.
Oil Leaks:
Potential leaks from primary or transmission seals, especially with age. Manual provides procedures for seal replacement.
Idle Control Module:
Some early EFI models could exhibit rough idle or stalling; the manual will offer diagnostic steps for the throttle body and sensors.
Brand Identity:
Harley-Davidson, an iconic American motorcycle manufacturer founded in 1903, renowned for its V-twin engines and classic styling.
Dyna Lineage:
The Dyna platform, introduced in 1991, was known for its rigid frame mounting of the engine (unlike the Softail's hidden rear suspension) and rubber isolation for vibration reduction. It bridged the gap between the lighter Sportster and the larger Touring models.
Production Years For Platform:
1991-2017
Key Models In 2008-2009:
Super Glide (FXDC), Super Glide Custom (FXDC), Low Rider (FXDL), Street Bob (FXDB), Fat Bob (FXDF), Wide Glide (FXDWG).
