🏷️ Basic Information

Make:

Harley-Davidson

Model:

FLH Shovelhead

Year:

1979

Engine Family Code:

Shovelhead

👋 Introduction

Historical Significance:

The 1979 FLH Shovelhead represents a significant era for Harley-Davidson, bridging traditional V-twin engineering with evolving performance and styling. These models are highly sought after by collectors and riders for their raw power and iconic American cruiser aesthetic.

Era Competitors:

Competed against other large-displacement V-twins from brands like Indian (though less prominent by this era), and custom or modified motorcycles that sought to emulate the Harley-Davidson experience. In terms of touring capability, it was a benchmark for American motorcycles.

Vehicle Characteristics:

Classic V-twin rumble, robust construction, comfortable riding position for touring, iconic styling, a platform for customization and personalization.

📋 Manual Details

Full Model Coverage:

All FLH Shovelhead models for 1979

Estimated Page Count:

Varies by specific edition, typically 300-500 pages for comprehensive workshop manuals.

Type:

Workshop Service Repair Manual

Language:

English

Format:

PDF Download

📖 Manual Coverage

Engine Systems:

Engine overhaul, cylinder head, cylinders, pistons, crankshaft, connecting rods, camshaft, timing, lubrication system, oil pump, oil filter, cooling system (air-cooled), fuel system (carburetor details, fuel lines, fuel pump), ignition system (spark plugs, ignition coil, distributor, points, condenser).

Transmission Drivetrain Systems:

4-speed constant mesh transmission, clutch operation and adjustment, primary drive, chain maintenance, final drive, rear drive sprocket, drive chain.

Chassis Suspension Systems:

Frame inspection and repair, front fork assembly (telescopic forks), rear shock absorbers, swingarm, bearings, wheel assembly, hub maintenance, spokes.

Braking Systems:

Front and rear brake systems (drum or disc depending on specific FLH variant), brake fluid, brake caliper maintenance, brake pad replacement, brake shoe replacement, master cylinder, brake lines.

Electrical Systems:

Battery maintenance, charging system (generator/alternator, voltage regulator), lighting system (headlight, taillight, turn signals), starting system (starter motor, solenoid), ignition switch, wiring diagrams, fuse panel, horn.

Fuel Exhaust Systems:

Fuel tank inspection and cleaning, fuel line routing, exhaust pipe mounting and sealing, mufflers.

Bodywork Fittings:

Fairing removal and installation (if equipped), fender mounting, seat removal and installation, handlebars, controls, instrument panel.

Maintenance Procedures:

Regular scheduled maintenance, oil changes, filter replacements, chain adjustments, lubrication points, spark plug replacement, air filter cleaning/replacement, brake adjustments, battery checks.

Troubleshooting Diagnostics:

Common issues and their solutions, diagnostic charts, electrical system troubleshooting, engine performance problems, starting issues, braking anomalies.

Repair Rebuild Procedures:

Complete engine disassembly and reassembly, transmission rebuild, clutch service, fork seal replacement, brake caliper overhaul, electrical component replacement, carburetor tuning and overhaul.

Technical Specifications Data:

Torque specifications for all fasteners, engine timing settings, valve clearances, fluid capacities, ignition timing, carburetor jetting, electrical component specifications.

Depth Of Information:

Comprehensive, covering from basic maintenance to complete engine and transmission rebuilds. Includes detailed diagrams and step-by-step instructions suitable for professional mechanics and experienced DIY enthusiasts.

📊 Manual Specifications

Digital Format Quality:

High-resolution PDF, typically searchable text for easy navigation and printing of specific sections.

Reproducibility:

Designed for clear printing of diagrams, charts, and text, ensuring legibility for practical use in a workshop environment.

Physical Manual Binding:

N/A (Digital PDF)

Physical Manual Paper:

N/A (Digital PDF)

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Engine Displacement:

74 cubic inches (1200cc) or 80 cubic inches (1310cc) depending on specific FLH variant (e.g., FLH-80).

Bore X Stroke:

Typically 3.4375 in. x 4.000 in. (for 74ci) or 3.500 in. x 4.250 in. (for 80ci).

Compression Ratio:

Varies, generally around 8.0:1 to 8.5:1 depending on factory tuning and model.

Horsepower Est:

Approximately 60-70 HP at 5000-5500 RPM (estimated, actual figures varied with tuning).

Torque Est:

Approximately 75-85 lb-ft at 3000-4000 RPM (estimated).

Carburetor:

Typically a Keihin butterfly carburetor (e.g., Keihin 36mm) or a Linkert carburetor for earlier or specific configurations. The manual will detail jetting and adjustment.

Fuel Type:

Unleaded gasoline, octane rating as specified in the manual (typically 91 RON or higher).

🔧 Transmission

Transmission Type:

4-speed constant mesh manual transmission.

Transmission Options:

No automatic transmission options available for this model year.

Clutch Type:

Wet, multi-plate clutch.

Primary Drive:

Duplex chain drive, enclosed in a primary cover with a wet clutch.

Final Drive:

Belt drive or chain drive depending on specific FLH variant and regional options.

📐 Dimensions

Wheelbase Est:

Approximately 60-63 inches depending on configuration.

Seat Height Est:

Approximately 28-30 inches (unladen).

Dry Weight Est:

Approximately 650-700 lbs.

Gross Vehicle Weight Rating Est:

Typically around 1000-1100 lbs.

Luggage Capacity:

Varies greatly depending on accessories like saddlebags and tour packs, which are common for FLH models.

🛡️ Safety Features

Crash Test Ratings:

Not applicable in the same manner as modern automobiles. Focus is on rider safety through vehicle dynamics, braking, and structural integrity.

Active Safety:

Effective braking systems (for their era), stable chassis, good rider visibility.

Passive Safety:

Robust frame construction, rider protection through rider positioning and control ergonomics.

💡 Technology Features

Infotainment System:

N/A. This era of motorcycles did not feature integrated infotainment systems. Audio systems were aftermarket additions if present at all.

Driver Assistance Features:

N/A. No electronic driver assistance features were present.

Connectivity Options:

N/A.

🔧 Maintenance

Oil Change Interval:

Typically every 2,000-3,000 miles or every 6 months, whichever comes first, as per the manual's specific recommendations.

Transmission Oil Interval:

Check and top off as needed; change typically every 10,000-20,000 miles, but refer to manual for exact intervals.

Chain Lubrication Interval:

Recommended every 500-1000 miles or after riding in wet conditions.

Engine Oil Type:

Harley-Davidson recommends specific V-twin motorcycle oils. For this era, common recommendations include SAE 20W-50 or SAE 50 (e.g., 63782-57 for oil, 63813-58 for oil filter).

Transmission Oil Type:

Harley-Davidson Gear Oil or equivalent (e.g., 63796-78).

Primary Chaincase Oil Type:

Harley-Davidson Primary Chaincase Oil or equivalent (e.g., 63796-78).

Brake Fluid Type:

DOT 4 or DOT 5 silicone-based fluid depending on caliper configuration and preference, refer to manual for original specification.

Common Shovelhead Issues:

Oil leaks (especially from crankcase seals and rocker boxes), starter clutch failure, carburetor tuning drift, wear on valve guides and seats, transmission output shaft seal leaks, electrical gremlins if wiring is not maintained.

Maintenance Focus:

Regular inspection of all seals and gaskets for leaks, proper carburetor adjustment, checking electrical connections, and maintaining the primary chain tension are crucial for reliability.

📚 Vehicle History

Brand Legacy:

Harley-Davidson, founded in 1903, is an icon of American motorcycling, renowned for its V-twin engines, distinctive styling, and enduring legacy of freedom and individuality.

Shovelhead Development:

The Shovelhead engine replaced the Panhead in 1966 and was produced until 1984. The FLH designation signifies a large touring frame, often equipped with fairings and luggage, making it a flagship model for Harley-Davidson.

Production Era:

The Shovelhead engine was produced from 1966 to 1984. The 1979 model year falls within this period, representing a mature iteration of the design.

Manufacturing Location:

Milwaukee, Wisconsin, USA.

🏆 Awards & Recognition

Historical Recognition:

While specific awards for the 1979 model are unlikely to be documented in a workshop manual context, the Shovelhead era is widely recognized by motorcycle enthusiasts and historians for its cultural impact and contribution to the cruiser motorcycle segment.

Reliability Ratings Historical:

Reliability varied depending on maintenance and specific production batches. These machines require diligent care, but when properly maintained, offer a classic riding experience.

Emissions Certifications:

N/A for this era of workshop manual context, as emissions regulations were less stringent and varied by region.