Positioning:
The 1971 Super Glide FX represented Harley-Davidson's entry into the 'cruiser' motorcycle segment, blending performance with a distinctive styling influenced by custom bikes.
Competition:
Competed with emerging Japanese cruisers and American V-twins from brands like Indian (though nearing its end) and custom builders.
Design:
The FX chassis, developed with input from AMF, introduced a sportier, more modern look compared to earlier Big Twins, featuring a distinctive cast aluminum frame downtube and updated styling.
Engine Option:
Exclusively powered by Harley-Davidson's 74 cubic inch (1200cc) Shovelhead V-twin engine.
Manual Utility:
Essential for owners and mechanics seeking authentic repair and maintenance procedures directly from the manufacturer's expertise.
Primary Coverage:
All repair, maintenance, and adjustment procedures for the 1971 Harley-Davidson Super Glide FX.
Secondary Coverage:
Troubleshooting, diagnostics, specifications, and schematics.
Estimated Pages:
Approximately 300-500 pages (typical for factory service manuals of this era, actual count may vary).
Type:
Factory Service Repair Manual
Format:
Printed Book (typically softcover or hardcover binding)
Engine:
Shovelhead Engine, including disassembly, assembly, tuning, ignition system, carburetor(s), lubrication system.
Transmission:
4-speed transmission, including gear shifting mechanisms, clutch operation, lubrication.
Chassis:
Frame, front fork (including springer or leading-link suspension), rear suspension, wheels, tires, braking system (drum brakes front and rear).
Electrical:
Wiring diagrams, lighting system, ignition system components (points, condenser, coil), battery, starter, charging system.
Fuel System:
Fuel tank, fuel lines, fuel filters, carburetor models (e.g., Linkert or early Keihin).
Controls:
Throttle controls, clutch lever, brake lever, foot controls.
Bodywork:
Fenders, fuel tank, seat, handlebars, exhaust system.
Maintenance:
Scheduled maintenance, oil changes, filter replacements, chain adjustment, spark plug service, brake adjustments.
Repair:
Engine internal repairs, transmission overhauls, suspension component replacement, brake system rebuilding, electrical component troubleshooting and replacement.
Troubleshooting:
Diagnostic procedures for common problems, electrical gremlins, engine performance issues.
Disassembly Assembly:
Step-by-step instructions for removing and reinstalling major components and sub-assemblies.
Depth:
Comprehensive. Covers basic adjustments to full engine and transmission rebuilds, including detailed torque specifications and clearances.
File Format:
N/A (Printed Book)
Print Quality:
Factory original print quality; clear text and diagrams. Reproduction quality may vary.
Binding:
Stapled, perfect bound, or hardbound (typical for factory manuals).
Paper Type:
Durable paper stock, often with coated pages for longevity in a workshop environment.
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Displacement:
74 cubic inches (1200 cc)
Bore X Stroke:
3.4375 in x 4.000 in (87.3 mm x 101.6 mm)
Compression Ratio:
Typically 8.0:1 or 8.4:1 (depending on specific variant and tuning).
Horsepower:
Estimated 60-65 HP (at the crank, subjective for the era).
Torque:
Estimated 65-70 ft-lbs (at the crank, subjective for the era).
Carburetor:
Linkert M74, M74B, or early Keihin butterfly type carburetor.
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended).
Ignition Type:
Battery-point ignition system.
Oil System:
Dry sump lubrication system with oil tank separate from crankcase.
Oil Capacity:
Approximately 3 quarts (2.8 liters) including oil tank.
Oil Specification:
Harley-Davidson recommends specific V-twin motorcycle oils. Typically SAE 20W-50 or 10W-40 depending on ambient temperature. Refer to manual for precise recommendations and part numbers.
Safety Standards:
Motorcycles of this era did not have standardized crash test ratings like modern cars. Safety features were basic.
Braking System:
Dual leading shoe drum brakes front and rear. Braking performance is rudimentary by modern standards.
Lighting:
Headlight, tail light, brake light, turn signals (if equipped from factory).
Frame Construction:
Steel frame with cast aluminum downtube. Designed for stability and vibration dampening.
First Service:
Initial break-in service typically around 500 miles (800 km) for engine oil change, transmission oil check, and general inspection.
Regular Maintenance:
Oil changes every 2,000-3,000 miles (3,200-4,800 km) or annually. Regular checks of chain tension, brake function, and tire pressure are critical.
Engine Oil Spec:
Refer to manual for exact viscosity and API service classification. SAE 20W-50 is a common recommendation for this era.
Transmission Oil Spec:
Specific motorcycle transmission fluid or gear oil as per manual. SAE 75W-90 is often suitable.
Primary Chain Case Oil Spec:
Often filled with engine oil, but verify with manual. Check manual for specific procedure and quantity.
Common Problems:
Oil leaks are common with Shovelhead engines. Carburetor tuning can be finicky. Ignition system maintenance (points, condenser) is crucial for reliable running. Drum brake performance requires careful adjustment and maintenance.
Shovellhead Quirks:
Known for their distinct exhaust note and vibration characteristics. Proper maintenance is key to longevity.
Heritage:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history of V-twin engine development and performance.
Fx Development:
The FX series was introduced in 1971, representing a significant shift in Harley-Davidson's lineup. It aimed to capture a younger demographic and compete with emerging Japanese performance bikes.
Shovellhead Era:
The 1971 model year marks the initial release of the Shovelhead engine in the FX platform, succeeding the Panhead engine.
Manufacturing Location:
Milwaukee, Wisconsin, USA.
Historical Significance:
The 1971 Super Glide FX is a significant motorcycle in Harley-Davidson's history, marking a stylistic and chassis evolution that influenced future models and the cruiser segment.
Appreciation:
Highly appreciated by collectors and enthusiasts for its vintage styling, V-twin rumble, and its role in Harley-Davidson's enduring legacy.
