Historical Context:
The Harley-Davidson Super Glide (FX series) represented a significant shift in Harley's lineup, blending the rigid frame of their big twins with a more accessible and versatile package, making it a popular choice for riders seeking performance and customization.
Segment Competitors:
Competed against other large-displacement V-twin cruisers and custom motorcycles from brands like Triumph, BSA, and later Japanese manufacturers.
Design Philosophy:
The SS model (often referred to as the FXE or FXS depending on specific configurations) embodied Harley's evolving design, aiming for a balance of classic styling with improved handling and performance for its era.
Engine Systems:
Engine overhaul, carburetor tuning, ignition system diagnosis and repair, lubrication system maintenance, cooling system (if applicable, though typically air-cooled for this era), exhaust system.
Transmission Drivetrain:
Clutch operation and adjustment, gearbox internal inspection and repair, final drive maintenance (chain and sprockets), primary drive system (clutch hub, chain, compensator).
Chassis Suspension Brakes:
Front fork service and overhaul, rear shock absorber replacement, brake system maintenance (hydraulic and mechanical components), wheel bearing service, steering head bearing adjustment.
Electrical System:
Wiring diagrams, lighting system troubleshooting, starter motor and charging system (generator/alternator) service, battery maintenance, ignition switch and controls.
Bodywork Frame:
Frame inspection, body panel removal and installation, seat assembly, fuel tank mounting and removal, fender service.
Maintenance Procedures:
Routine checks, oil changes, filter replacements, chain lubrication and adjustment, spark plug replacement, brake fluid checks, tire pressure adjustments.
Troubleshooting Guides:
Diagnostic procedures for common running issues, electrical faults, starting problems, and braking anomalies.
Repair Procedures:
Step-by-step instructions for engine rebuilds, transmission overhauls, carburetor rebuilding, brake caliper servicing, and electrical component replacement.
Disassembly Assembly:
Detailed instructions for taking apart and reassembling major components and systems.
Diagnostic Capabilities:
Advanced diagnostic procedures for identifying subtle mechanical and electrical issues, including timing adjustments and compression testing.
Rebuild Instructions:
Comprehensive instructions for complete engine and transmission rebuilds, including torque specifications and clearances.
Wiring Diagrams:
Detailed and often color-coded electrical schematics for accurate troubleshooting.
Engine Type:
Air-cooled, 45-degree V-twin
Engine Displacement:
74 cubic inches (1217 cc)
Bore X Stroke:
3.4375 in x 4.25 in (87.3 mm x 108 mm)
Compression Ratio:
8.0:1 (typical, may vary by sub-model)
Horsepower:
Approximately 55-60 HP (est.)
Torque:
Approximately 75-80 ft-lbs (est.)
Carburetor:
Keihin butterfly carburetor (e.g., Keihin CV or Linkert may be found, but Keihin butterfly was common in this era for FX models)
Fuel Type:
Unleaded gasoline, 91 octane or higher recommended
Ignition Type:
Contact breaker points ignition, battery and coil ignition system
Transmission Type:
4-speed constant mesh, foot-shifted
Primary Drive:
Duplex primary chain drive to clutch
Final Drive:
O-ring sealed chain drive
Clutch Type:
Wet multi-plate clutch, operated by foot lever
Crash Test Data:
N/A (Motorcycle safety ratings not standardized in the same way as automobiles during this period)
Braking System:
Front disc brake (hydraulic), rear drum brake (mechanical). Later models within this range may have introduced dual front discs.
Frame Design:
Steel cradle frame, designed for stability and rider support.
Oil Change Interval:
Every 2,000-3,000 miles or annually. Refer to specific manual for exact mileage based on oil type and riding conditions.
Primary Chain Adjustment:
Check and adjust every 1,000-2,000 miles.
Spark Plug Replacement:
Inspect every 4,000 miles, replace as needed or every 8,000-10,000 miles.
Engine Oil Type:
Harley-Davidson 360 SAE 20W-50, or equivalent API SG or higher quality motorcycle-specific oil. Check manual for specific recommendations.
Transmission Oil Type:
Harley-Davidson 360 SAE 80W-90 gear oil, or equivalent API GL-4 motorcycle gear oil.
Primary Chain Case Oil Type:
Harley-Davidson primary lubricant, or a high-quality wet-clutch compatible motorcycle primary fluid.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (for hydraulic front brake).
Carburetor Tuning:
Carburetors from this era (especially early Keihins) can require frequent adjustment due to wear and environmental factors. Leaking fuel or rough idling are common symptoms.
Oil Leaks:
Common across many vintage Harleys due to aging seals, gaskets, and crankcase construction. Primary and engine case leaks are frequent.
Electrical System Reliability:
Wiring harnesses can degrade over time, leading to intermittent electrical faults. Charging systems (generators/alternators) may require attention or upgrade.
Clutch Drag:
Can occur due to improper adjustment or wear in the clutch plates and primary drive system.
Ignition Timing:
Timing can drift, affecting performance and engine health. Regular checks and adjustments are necessary.
Brand Identity:
Harley-Davidson is an iconic American motorcycle manufacturer renowned for its V-twin engines, distinctive styling, and strong rider community. Their motorcycles are synonymous with freedom and American culture.
Introduction Year:
The FX Super Glide was introduced in 1971, marking a significant step by combining the Shovelhead engine with a lighter frame than the FL models.
1974 Updates:
Specific updates for 1974 models often included refinements to the engine, transmission, and electrical systems, potentially including improvements to the generator/alternator and carburetor systems.
1975 Updates:
The 1975 model year saw the introduction of the electric start as standard on many models, including the Super Glide, enhancing rider convenience. Carburetor changes and ignition system updates were also common.
1976 Updates:
Continued refinement of the FX chassis and drivetrain, with potential updates to the Shovelhead engine for improved reliability and performance, as well as aesthetic changes.
Manufacturing Location:
Milwaukee, Wisconsin, USA
