🏷️ Basic Information

Make:

Harley-Davidson

Model:

Super Glide FX

Year:

1977

Chassis Code:

FX

👋 Introduction

Segment:

Classic American V-twin cruiser motorcycle.

Target Audience:

Owners and mechanics of 1977 Harley-Davidson Super Glide FX models, DIY enthusiasts, restoration specialists.

Competitors:

Other American V-twin motorcycles of the era, such as Indian (limited production) and custom choppers.

Vehicle Features:

Iconic Shovelhead engine, distinctive FX styling, robust construction, significant customisation potential.

Manual Value:

Essential for maintaining originality, performing correct repairs, and understanding the complex systems of a vintage Harley-Davidson.

📋 Manual Details

Primary Coverage:

Repair and maintenance of 1977 Harley-Davidson Super Glide FX models.

Page Count:

Est. 300-500 pages (typical for factory service manuals of this era)

Manual Type:

Factory Service Manual / Repair Manual

Language:

English

Format:

Printed document (likely spiral-bound or perfect bound)

📖 Manual Coverage

Engine:

Shovelhead V-Twin engine (disassembly, assembly, timing, lubrication, cooling system components).

Fuel System:

Carburetor (e.g., Keihin butterfly or Linkert), fuel pump, fuel lines, fuel tank inspection and cleaning.

Ignition System:

Battery, ignition coil, spark plugs, points and condenser (or early electronic ignition), timing procedures.

Transmission:

4-speed constant mesh transmission (disassembly, assembly, gear ratios, clutch operation, lubrication).

Drive Train:

Primary drive chain, clutch, final drive chain (tensioning, lubrication, replacement).

Suspension:

Front fork (telescopic, oil changes, seal replacement), rear shock absorbers and swingarm (lubrication, adjustment).

Brakes:

Front disc brake, rear drum brake (master cylinder, caliper, pads, shoes, brake fluid specifications, bleeding).

Electrical System:

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

Frame And Body:

Frame inspection, handlebars, seat, fenders, fuel tank mounting, side covers.

Maintenance:

Oil changes, filter replacement, chain lubrication and adjustment, brake adjustments, tire pressure checks, spark plug replacement, battery care.

Troubleshooting:

Diagnostic charts for common starting problems, running issues, electrical faults, and braking concerns.

Repair:

Complete disassembly and reassembly instructions for engine, transmission, brakes, and other major components.

Inspection:

Pre-ride checks, periodic inspections for wear and damage on critical components.

Adjustment:

Carburetor tuning, ignition timing, clutch adjustment, primary chain adjustment, suspension settings.

Depth:

Comprehensive; covers from basic adjustments to complete engine and transmission rebuilds.

📊 Manual Specifications

File Format:

Physical printed book (non-digital unless specified otherwise by reseller)

Print Quality:

Factory original or high-quality reproduction print

Binding Type:

Typically spiral-bound or perfect bound for workshop use

Paper Type:

Durable, often coated paper to withstand workshop environments

⚙️ Engine Specifications

Engine Type:

Air-cooled, 45-degree V-twin, OHV (Shovelhead)

Displacement:

73.7 cubic inches (1208 cc) - commonly referred to as the 74 cubic inch motor.

Bore X Stroke:

3.4375 in x 4.25 in (87.31 mm x 107.95 mm) - typical for 74ci Shovelhead

Compression Ratio:

Approximately 8.0:1 (may vary slightly with specific configurations)

Horsepower:

Approx. 60-65 HP at 5500 RPM (estimated, actual figures can vary)

Torque:

Approx. 70-75 ft-lbs at 3500 RPM (estimated, actual figures can vary)

Carburetor Type:

Keihin Butterfly (often HM32 or similar), or potentially a Linkert on earlier models/conversions.

Fuel Type:

Unleaded gasoline (lead was phased out, but lead substitutes might be recommended for older valve seats).

Fuel Tank Capacity:

Typically 3.5 US gallons (13.25 liters) for the Fat Bob style tank.

🔧 Transmission

Transmission Type:

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

Optional Transmission:

Not applicable for this model year from the factory, all were 4-speed.

Clutch Type:

Dry multi-plate, operated by hand lever.

Gear Ratios:

Specific ratios would be detailed in the manual, typically around: 1st: 2.94:1, 2nd: 2.26:1, 3rd: 1.74:1, 4th: 1.33:1 (these are representative).

Transmission Fluid:

Specific Harley-Davidson transmission fluid or equivalent 80W gear oil (check manual for exact specification).

📐 Dimensions

Wheelbase:

Approximately 61.5 inches (1562 mm) - can vary slightly based on fork rake and rear suspension.

Length:

Typically around 88-92 inches (2235-2337 mm).

Ground Clearance:

Approx. 4.5-5.5 inches (114-140 mm).

Dry Weight:

Approximately 550-600 lbs (250-272 kg).

Gross Vehicle Weight Rating:

Not typically specified with a GVWR in the same way as cars, but payload capacity should be considered.

Load Capacity:

Designed for rider and passenger plus luggage, generally around 400-500 lbs.

🛡️ Safety Features

Safety Ratings:

Motorcycles of this era did not have standardized crash test ratings like modern cars.

Braking System:

Front hydraulic disc brake, rear mechanical drum brake. Dual-disc front was an option on some models but typically single disc for the FX in '77.

Lighting:

Halogen headlight, taillight, brake light, turn signals (front and rear).

Frame Construction:

Steel tube frame, designed for rigidity and rider support.

Suspension Design:

Telescopic front fork with damper control, rear swingarm with adjustable shock absorbers contributing to stability.

💡 Technology Features

Infotainment System:

N/A for 1977 models. Primarily analog gauges.

Driver Assistance Features:

N/A for 1977 models.

Connectivity Features:

N/A for 1977 models. Focus is mechanical.

🔧 Maintenance

Oil Change Interval:

Typically every 1,500-2,500 miles or 3-4 months (check manual for precise intervals).

Primary Chain Tension:

Check and adjust every 1,000 miles.

Spark Plug Replacement:

Every 5,000-10,000 miles, depending on plug type and usage.

Brake Fluid Flush:

Recommended every 2 years.

Engine Oil:

API SF/CD or SG/HD rated oil, viscosity typically 20W-50 or 10W-40 for Shovelheads (verify with manual).

Engine Oil Capacity:

Approximately 3 quarts (2.8 liters) with filter change.

Transmission Fluid:

Harley-Davidson transmission lubricant or a quality 80W gear oil.

Fork Oil:

Specific weight and type of fork oil, often ATF or dedicated fork oil (check manual).

Oil Leaks:

Common on Shovelheads due to aging seals and gaskets. The manual provides procedures for replacement.

Vibration:

Shovelhead engines are known for inherent vibration; proper balance and mounting are critical. The manual addresses this.

Carburetor Tuning:

Can be finicky; regular cleaning and adjustment are often required for optimal performance. Manual provides detailed procedures.

Electrical Gremlins:

Vintage wiring can degrade; the manual's wiring diagrams are invaluable for troubleshooting.

📚 Vehicle History

Brand Legacy:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer renowned for its V-twin engines and cruiser lifestyle.

Super Glide Origin:

The Super Glide, introduced in 1971 (as the FX 1200), was Harley-Davidson's first major redesign in decades, featuring a then-modern frame and styling cues from custom motorcycles. The FX prefix indicated a frame that blended elements of the Big Twin (FL) and Sportster (XL) families. The FXE offered electric start as standard.

Shovelhead Era:

The 1977 model falls within the Shovelhead era (1966-1984), known for its distinctive rocker box styling and robust, if sometimes vibration-prone, performance.

Manufacturing Location:

Milwaukee, Wisconsin, USA

Production Period:

1977 production year for the Super Glide FX.

🏆 Awards & Recognition

Vehicle Recognitions:

The Super Glide FX of this era is celebrated as a significant model in Harley-Davidson's history, representing a transition period and a foundation for future designs. Often considered a 'modern classic' by enthusiasts.

Owner Satisfaction:

Subjective, but highly regarded by owners for its character, sound, and classic styling. Performance and reliability are often secondary to the experience for collectors.