🏷️ Basic Information

Make:

Harley-Davidson

Model:

FX 1200

Model Variant:

Super Glide

Year:

1978

Engine Family Code:

Shovelhead

👋 Introduction

Market Position:

The FX 1200 Super Glide was a significant model in Harley-Davidson's lineup, marking a departure with its factory-custom styling and the introduction of the 'Dyna' style frame, though this specific 1978 model predates the formal Dyna branding but shares design cues. It catered to riders seeking a more modern and distinctive cruiser.

Competitors:

Competed against other American V-twins and the emerging Japanese performance cruisers of the era, though Harley-Davidson maintained a strong niche.

Model Evolution:

The FX series represented Harley-Davidson's evolution towards more integrated styling and performance in the late 70s. The 1200cc 'Shovelhead' engine was a staple.

📋 Manual Details

Primary Coverage:

Complete service and repair for the 1978 Harley-Davidson FX 1200 Super Glide.

Secondary Coverage:

Includes maintenance, troubleshooting, diagnostics, and specifications for all major vehicle systems.

Total Pages:

Approximately 300-400 pages (estimate based on typical factory service manuals for this era).

Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Likely available as a reprinted physical book or a high-quality digital PDF.

📖 Manual Coverage

Engine:

Detailed inspection, disassembly, reassembly, timing, carburetion (e.g., Keihin, Linkert variants), ignition system (points, coils), lubrication system.

Transmission:

4-speed constant mesh gearbox: disassembly, assembly, gear inspection, clutch operation, primary drive, lubrication.

Chassis:

Frame inspection, steering head bearings, fork assembly (e.g., 35mm conventional forks), rear shock absorbers, swingarm.

Brakes:

Front and rear brake systems (likely drum brakes for this year and model, possibly early disc front), brake pad/shoe inspection, hydraulic system (if applicable), adjustment.

Electrical:

Wiring diagrams, charging system (generator/alternator, regulator), battery, lighting system (headlight, taillight, signals), ignition switch, starter system, horn.

Fuel System:

Fuel tank, fuel lines, fuel filter, carburetor servicing and adjustment.

Exhaust System:

Exhaust pipes, mufflers, mounting and inspection.

Wheels And Tires:

Wheel bearing inspection and service, tire inspection, recommended pressures.

Bodywork And Trim:

Fender removal/installation, fuel tank mounting, seat, handlebars, and related trim components.

Routine Maintenance:

Oil changes, filter replacement, spark plug service, chain adjustment (if applicable), lubrication points.

Diagnostic Troubleshooting:

Step-by-step guides for identifying and resolving common performance issues, electrical faults, and mechanical problems.

Engine Rebuild:

Detailed procedures for top-end rebuild (cylinders, pistons, heads) and potentially bottom-end work (crankshaft, bearings) with torque specifications.

Transmission Overhaul:

Complete teardown and rebuild procedures for the 4-speed gearbox.

Electrical System Repair:

Troubleshooting and repair of ignition, charging, lighting, and starting systems using wiring diagrams.

Suspension Service:

Fork oil changes, seal replacement, rear shock adjustment or replacement.

Suspension Tuning:

Adjustment procedures for suspension components for optimal ride quality and handling.

Carburetor Overhaul:

Detailed steps for disassembling, cleaning, and reassembling the specific carburetor models used on the FX 1200.

Ignition Timing Adjustment:

Procedures for setting ignition timing using points and timing marks.

Depth Level:

Comprehensive, suitable for professional mechanics and experienced DIY enthusiasts. Covers detailed disassembly, measurement specifications, and reassembly instructions.

📊 Manual Specifications

Digital Format:

PDF (if digital); high-resolution scans of original pages, searchable text is a plus.

Print Quality:

High-quality reprint of original factory publication; clear diagrams and legible text.

Binding Type:

Stapled, perfect bound, or coil bound for lay-flat usability in a workshop environment.

Paper Type:

Durable paper stock, suitable for workshop use (e.g., semi-gloss or matte finish).

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Engine Displacement:

1200 cc (73.7 cubic inches)

Engine Code:

Shovelhead

Bore X Stroke:

3.4375 in x 3.96875 in (87.3 mm x 100.7 mm)

Compression Ratio:

Typically around 8.0:1 for this era.

Valve Train:

Overhead valves, operated by pushrods and lifters.

Horsepower Estimate:

Estimated 60-70 HP (peak, at rear wheel) - figures vary based on tuning.

Torque Estimate:

Estimated 65-75 ft-lbs (peak) - figures vary based on tuning.

Cooling System:

Air-cooled.

Carburetor:

Typically a Keihin butterfly or a Linkert carburetor (check specific model variant documentation).

Fuel Type:

Unleaded gasoline, octane rating typically 87-91.

🔧 Transmission

Transmission Type:

4-speed constant mesh, foot shift, hand clutch.

Primary Drive:

Primary chain drive, enclosed in a primary case.

Final Drive:

Belt drive

Transmission Fluid Type:

API GL-1 gear oil, SAE 75W-90 or 80W-90 (specific manual to confirm viscosity and API rating).

📐 Dimensions

Wheelbase:

Approximately 61.5 inches (1562 mm) - typical for the era.

Dry Weight:

Approximately 570-600 lbs (259-272 kg) - estimate, can vary.

Fuel Capacity:

Typically around 3.5 gallons (13.2 liters) including reserve.

🛡️ Safety Features

Safety Ratings:

No formal crash ratings in the modern sense for motorcycles of this era. Safety relies on rider skill and vehicle design integrity.

Braking System:

Front and rear drum brakes, or front disc/rear drum depending on specific FX 1200 configuration in '78.

Lighting:

Headlight, taillight, brake light, turn signals.

💡 Technology Features

Infotainment System:

None. This motorcycle is from an era before integrated infotainment systems.

Driver Assistance Features:

None. Relies entirely on rider input and skill.

Connectivity:

None. No electronic connectivity features.

🔧 Maintenance

Oil Change Interval:

Typically every 2,000-3,000 miles or 6 months, whichever comes first (consult manual for exact interval and oil type).

Spark Plug Replacement:

Every 6,000-10,000 miles, or as recommended by the manual.

Primary Chain Adjustment:

Check and adjust as needed, often every 2,000 miles or after significant chain stretch.

Engine Oil Type:

Primarily Harley-Davidson recommended 20W-50 motorcycle oil, or equivalent (verify API rating and viscosity in manual).

Engine Oil Capacity:

Approximately 3 quarts (2.8 liters) for dry fill, less for oil change with filter.

Primary Chain Case Oil Type:

Similar to engine oil, often 20W-50 motorcycle oil or specialized primary fluid (check manual).

Primary Chain Case Oil Capacity:

Approximately 1 quart (0.95 liters).

Shifter Lever Pivot:

Wear at the shifter lever pivot can lead to imprecise shifting.

Carburetor Tuning:

Carburetors of this era often require periodic tuning and cleaning for optimal performance.

Electrical Connections:

Corrosion and looseness in electrical connections can cause intermittent faults.

Fork Seals:

Leaking fork seals are a common wear item.

Points Ignition:

Contact points ignition requires regular inspection and adjustment for timing accuracy.

📚 Vehicle History

Brand Heritage:

Harley-Davidson, established in 1903, is an iconic American motorcycle manufacturer with a rich history of V-twin engines and a distinct brand culture.

Fx Series Evolution:

The FX series, introduced in 1971, was Harley-Davidson's response to custom styling trends. The FX 1200 1978 model is part of the evolution that led to the later highly successful Dyna line.

Production Era:

The Shovelhead engine was in production from 1966 to 1984. The FX 1200 model was produced throughout much of the 1970s.

🏆 Awards & Recognition

Industry Recognition:

While specific awards for the '78 FX 1200 are not widely documented, the Shovelhead engine and FX platform are considered classic and influential in motorcycle history. They represent an era of American muscle and customization.