🏷️ Basic Information

Make:

Harley-Davidson

Model:

Super Glide FXS

Year:

1977

Chassis Code:

FXS

👋 Introduction

Positioning:

The 1977 Super Glide FXS was a significant model for Harley-Davidson, representing their cruiser/custom styling with a powerful V-twin engine, competing in a growing market segment.

Competitors:

Competed against other American V-twin motorcycles and customizers, as well as burgeoning Japanese motorcycle offerings in the large displacement segment.

Model Identity:

The FXS model specifically offered a more laid-back, custom riding position with forward controls and often a distinctive tank and fender styling.

Powertrain:

The Shovelhead engine provided the iconic Harley-Davidson rumble and torque, making it a desirable machine for cruising and customization.

Utility:

Essential reference for owners and technicians seeking to maintain, repair, and restore the classic 1977 Harley-Davidson Super Glide FXS.

📋 Manual Details

Overall Coverage:

Comprehensive service, repair, and maintenance for the 1977 Harley-Davidson Super Glide FXS.

Estimated Pages:

300-400

Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Printed Book

📖 Manual Coverage

Engine:

V-twin, air-cooled Shovelhead engine specifications, disassembly, assembly, tuning, and troubleshooting.

Fuel System:

Carburetor (likely Linkert or AMF-era Stromberg), fuel tank, fuel lines, and fuel pump (if applicable) maintenance and adjustment.

Ignition System:

Magneto or battery ignition system, spark plugs, ignition timing, coil, points, and condenser service.

Transmission:

4-speed constant mesh transmission, clutch operation, maintenance, disassembly, and assembly.

Drivetrain:

Primary drive, chain maintenance, rear drive belt or chain inspection and adjustment.

Brakes:

Front and rear brake system service, including hydraulic or mechanical brake components, fluid, and adjustment.

Suspension:

Front fork (likely leading-link or telescopic) and rear shock absorber service, maintenance, and adjustments.

Electrical System:

Wiring diagrams, battery service, charging system (generator/alternator), lighting, starter motor, and switches.

Wheels And Tires:

Wheel bearing service, tire pressure specifications, and tire replacement.

Frame And Bodywork:

Frame inspection, body panel removal and installation, seat, fenders, and fuel tank mounting.

Controls:

Handlebar controls, cables, levers, and foot controls adjustment and service.

Maintenance:

Regular scheduled maintenance, lubrication points, filter replacement, and fluid changes.

Troubleshooting:

Diagnostic procedures for common problems, symptom identification, and corrective actions.

Repair:

Step-by-step repair instructions for all major components and systems.

Disassembly Assembly:

Detailed instructions for taking apart and putting back together all major components.

Tuning Adjustment:

Carburetor tuning, ignition timing adjustments, suspension settings, and clutch adjustment.

Depth:

Full factory-level repair and overhaul procedures, suitable for professional mechanics and experienced DIY enthusiasts.

📊 Manual Specifications

Digital Quality:

N/A (Printed)

Print Quality:

High-quality paper, clear diagrams, and legible text typical of factory service manuals.

Binding:

Likely saddle-stitched or perfect bound for durability in a workshop environment.

Paper Type:

Durable, semi-gloss paper suitable for workshop use.

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin

Displacement:

1200cc (74 cubic inches)

Bore X Stroke:

3.4375 in x 4.00 in (87.31 mm x 101.60 mm) - typical for 74ci Shovelhead

Compression Ratio:

Typically 8.0:1 to 8.5:1 (subject to variant)

Valve Train:

Overhead valve (OHV) with pushrods

Horsepower:

Approximately 60-65 HP (estimated, varies with tuning)

Torque:

Approximately 65-70 lb-ft (estimated, varies with tuning)

Carburetor:

Typically a Linkert M-series or AMF-era carburetor (e.g., Keihin butterfly type or Stromberg dual barrel)

Fuel Type:

Unleaded gasoline (premium recommended)

Oil Capacity:

Approximately 3 quarts (2.8 liters) for engine and transmission combined (common for primary system)

Oil Type:

Specific Harley-Davidson oil or equivalent SAE 20W-50 motorcycle oil

🔧 Transmission

Type:

4-speed, constant mesh, manual transmission

Clutch:

Wet multi-plate clutch

Primary Drive:

Primary chain drive to transmission

Final Drive:

Belt drive or chain drive (depending on specific FXS variant, but FXS commonly had belt drive)

Transmission Fluid:

SAE 50 or 70W gear oil (check manual for precise specification)

📐 Dimensions

Wheelbase:

Approximately 62 inches (1575 mm)

Length:

Approximately 90 inches (2286 mm)

Dry Weight:

Approximately 580-600 lbs (263-272 kg)

Gross Vehicle Weight Rating:

Typically around 950-1000 lbs (431-454 kg)

🛡️ Safety Features

Safety Standards:

Designed to meet 1970s motorcycle safety standards; modern safety ratings not applicable.

Brakes:

Front disc brake, rear drum brake (typical configuration for the era).

💡 Technology Features

Features:

No modern infotainment systems. Basic instrumentation includes speedometer, odometer, and indicator lights.

Features:

None. Relies on rider input and basic mechanical systems.

Features:

No connectivity features. Pure mechanical and electrical systems.

🔧 Maintenance

Oil Change:

Every 2,000-3,000 miles or 6 months (typical for the era, check manual for specifics).

Primary Chain Adjustment:

As needed, typically every 5,000-10,000 miles.

Spark Plug Replacement:

Every 10,000-15,000 miles.

Brake Fluid Flush:

Every 2 years (if hydraulic system).

Engine Oil:

Harley-Davidson 20W-50 or equivalent.

Transmission Oil:

SAE 50 or 70W gear oil.

Brake Fluid:

DOT 3 or DOT 4 (if hydraulic, check manual).

Shovlehead Engine:

Oil leaks (common with age), valve train noise, carburetor tuning quirks, ignition system reliability.

Amf Era Components:

Potential for lower quality control on certain components compared to earlier or later Harley-Davidson eras.

Electrical System:

Aging wiring harnesses, failing voltage regulators, and battery charging issues are common with unrestored examples.

Approach:

Emphasizes regular inspection, lubrication, and timely replacement of wear items for optimal performance and longevity.

📚 Vehicle History

Heritage:

Harley-Davidson, founded in 1903, boasts a long and iconic history in American motorcycle manufacturing.

Fx Series:

The FX series, introduced in 1971, represented Harley-Davidson's move towards a 'super-bike' or 'custom' style, diverging from the traditional FL (Electra Glide) and XL (Sportster) lines.

Fxs Super Glide:

The FXS Super Glide was specifically styled as a factory custom, often featuring extended front ends, unique paint schemes, and forward controls, making it a precursor to modern cruiser designs.

Production Period:

The FXS was produced from 1971 through 1977, with the 1977 model being the final iteration of this specific design.

Era Context:

The late 1970s saw Harley-Davidson under AMF ownership, a period often marked by manufacturing challenges but also continued development of iconic models like the FXS.

🏆 Awards & Recognition

Historical Impact:

The FXS series is recognized as a significant step in Harley-Davidson's styling evolution and a foundational model for the factory custom movement.

Performance Reviews:

Contemporary reviews often highlighted its powerful engine and distinctive styling, though sometimes noted handling characteristics compared to more nimble motorcycles.

Certification Standards:

Not applicable in the modern sense; built to AMA and federal transportation standards of the era.