🏷️ Basic Information

Make:

Harley-Davidson

Model:

Dyna

Year:

2008

Platform Code:

Dyna

👋 Introduction

Market Position:

The Harley-Davidson Dyna series is positioned as a versatile cruiser, offering a blend of classic styling and performance, appealing to riders who value a raw, authentic riding experience and a customizable platform.

Competitive Analysis:

Competes with other American V-twin cruiser manufacturers and some Japanese motorcycle brands offering similar displacement and styling.

Key Features:

Rubber-mounted V-twin engines for reduced vibration, distinct styling, and a robust aftermarket support.

📋 Manual Details

Systems Covered:

Engine, Transmission, Drivetrain, Chassis, Suspension, Brakes, Electrical System, Fuel System, Exhaust System, Bodywork, Frame, Controls, Instrumentation, Lighting, Wheels, Tires, Diagnostics, Troubleshooting, Maintenance

Estimated Page Count:

600+

Manual Type:

Workshop Service Repair Manual

Language:

English

Format:

Downloadable Digital Format (PDF)

📖 Manual Coverage

Engine Management:

Detailed coverage of fuel injection (EFI) systems, ignition timing, sensors, actuators, and diagnostic procedures.

Powertrain:

Comprehensive procedures for engine disassembly, reassembly, top-end and bottom-end rebuilds, transmission removal, inspection, repair, and clutch service.

Drivetrain:

In-depth coverage of final drive belt inspection, tensioning, replacement, and related components.

Suspension And Steering:

Front fork service (oil change, seal replacement, fork internals), rear shock absorber inspection and replacement, swingarm service, and steering head bearing adjustment and replacement.

Braking System:

Detailed instructions for front and rear brake caliper service, master cylinder overhaul, brake line replacement, brake fluid bleeding, and ABS system diagnostics (if applicable).

Electrical And Ignition:

Wiring diagrams, component testing, starter motor, charging system (stator, regulator/rectifier), battery service, ignition system troubleshooting, and lighting system repair.

Fuel And Exhaust:

Fuel tank removal, fuel pump service, fuel filter replacement, exhaust system inspection and component replacement.

Bodywork And Frame:

Fairing and body panel removal/installation, seat service, fender service, frame inspection, and related hardware.

Wheels And Tires:

Tire inspection, mounting, dismounting, and wheel bearing service.

Scheduled Maintenance:

Oil and filter changes, primary chain adjustment, spark plug replacement, air filter cleaning/replacement, brake fluid flush, drive belt inspection, and battery maintenance.

Troubleshooting:

Systematic diagnostic flowcharts and common problem identification for engine performance, electrical issues, starting problems, and braking concerns.

Repair And Rebuild:

Step-by-step instructions for major component repairs and complete engine or transmission rebuilds.

Assembly And Disassembly:

Detailed guides for removing and reinstalling all major vehicle components.

Technical Adjustments:

Proper procedures for setting ignition timing, adjusting primary chain, and calibrating electronic systems.

Technical Depth:

Comprehensive from basic maintenance and fluid changes to advanced engine diagnostics, transmission overhauls, and electrical system troubleshooting.

📊 Manual Specifications

File Format:

Searchable PDF

Print Quality:

High-resolution diagrams and clear text for easy viewing and printing.

Binding Type:

N/A (Digital Download)

Paper Type:

N/A (Digital Download)

Manual Completeness:

This is a complete workshop service manual, covering all aspects of repair and maintenance for the specified model year and variants.

Usability:

Designed for both professional technicians and experienced DIY enthusiasts. Clear instructions, exploded views, and diagnostic charts enhance ease of use.

⚙️ Engine Specifications

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)

Compression Ratio:

8.8:1

Valve Train:

Pushrod-actuated, overhead valves with two valves per cylinder.

Cooling System:

Air-cooled

Horsepower Estimate:

Approximately 70-75 HP (may vary by model and tuning)

Torque Estimate:

Approximately 86-92 ft-lbs @ 3500 RPM (may vary by model and tuning)

Fuel Delivery:

Electronic Sequential Port Fuel Injection (ESPFI)

Fuel Type:

Unleaded gasoline, minimum 87 octane

Oil Type:

Harley-Davidson Genuine V-Twin Synthetic 20W-50 or equivalent motorcycle oil.

Oil Capacity Engine:

3.5 US quarts (3.3 Liters) with filter change.

Primary Chain Case Oil Type:

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

Primary Chain Case Oil Capacity:

Approximately 1 quart (0.95 Liters).

🔧 Transmission

Transmission Type:

6-speed constant mesh, cruise drive

Clutch Type:

Clutched, multi-plate, wet

Gear Ratios Estimate:

1st: 9.312, 2nd: 6.438, 3rd: 4.774, 4th: 3.790, 5th: 3.279, 6th: 2.790 (typical for Twin Cam 6-speed)

Transmission Oil Type:

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

Transmission Oil Capacity:

Approximately 20-24 fl oz (591-710 mL) depending on model variant.

📐 Dimensions

Wheelbase Estimate:

64.5 inches (1638 mm)

Dry Weight Estimate:

Approximately 600-630 lbs (272-286 kg) depending on model variant.

Gross Vehicle Weight Rating Estimate:

Approximately 1000-1050 lbs (454-476 kg)

Fuel Capacity:

4.7 US gallons (17.8 Liters)

🛡️ Safety Features

Safety Ratings:

Motorcycles are not typically assigned NHTSA or IIHS crash test ratings. Safety is primarily based on rider skill and adherence to safe riding practices.

Active Safety Features:

Disc brakes front and rear, potentially ABS on certain premium models (check specific model for ABS availability).

Passive Safety Features:

Sturdy frame, rider ergonomics designed for control, headlights, taillights, turn signals.

💡 Technology Features

Infotainment System:

Base models typically feature analog gauges. Higher-end trims or optional accessories may include basic radio systems or provision for aftermarket audio.

Driver Assistance Features:

No advanced driver-assistance systems (ADAS) found on this model. Focus is on rider input and mechanical feedback.

Connectivity Features:

Limited to basic electrical connections for lighting, ignition, and diagnostics. No modern Bluetooth or smartphone integration from the factory.

🔧 Maintenance

Initial Service:

First service typically recommended at 1,000 miles (1,600 km) or 12 months.

Regular Maintenance:

Subsequent services generally at 5,000-mile (8,000 km) or 12-month intervals, including engine oil and filter, primary oil, inspection of all systems.

Spark Plug Replacement:

Recommended every 10,000-15,000 miles (16,000-24,000 km), or as per manual inspection.

Drive Belt Inspection:

Inspect every 5,000 miles (8,000 km) for wear and proper tension. Replacement based on wear.

Engine Oil Specification:

Harley-Davidson Genuine V-Twin Synthetic 20W-50

Primary Oil Specification:

Harley-Davidson Formula + Transmission and Primary Chaincase Lubricant

Transmission Oil Specification:

Harley-Davidson Formula + Transmission and Primary Chaincase Lubricant

Brake Fluid Specification:

DOT 4 brake fluid

Fork Oil Specification:

Typically SAE 15W or 20W fork oil (specific viscosity may vary by model and suspension type).

Known Issues:

Some earlier Twin Cam engines experienced oil consumption or leaks. Primary chain tensioner wear can be an issue requiring replacement with updated designs. Clutch basket run-out concerns on high-mileage units. Vibration from the engine can lead to loosening of some fasteners.

📚 Vehicle History

Brand Heritage:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines, distinctive styling, and a strong rider culture.

Model Evolution:

The Dyna platform, introduced in 1991, evolved through various engine configurations, chassis refinements, and styling updates, culminating in the Twin Cam era which offered increased power and smoother operation.

Production Period:

The Twin Cam 96 engine was a staple in the Dyna line for many years, with the 2008 model year being a significant iteration.

🏆 Awards & Recognition

Recognitions:

While specific awards for the 2008 Dyna models are not widely publicized, the Twin Cam engine platform itself received critical acclaim for its power and reliability advancements over previous generations.

Consumer Ratings:

Owner satisfaction ratings for Harley-Davidson motorcycles are generally high, particularly for models with the Twin Cam engine, due to their character and the brand's community.