Market Segment:
Performance Cruiser / Chopper Segment
Competition:
Competed against other custom-style motorcycles, often modified from standard models or from specialist builders.
Design Philosophy:
Designed to bridge the gap between factory-produced bikes and the custom chopper scene of the era, offering a factory-built custom look.
Styling:
Distinctive chopper styling with extended forks, forward-mounted controls, and a low-slung profile.
Target Audience:
Riders seeking a factory-backed custom aesthetic and performance, appealing to the counter-culture and performance-oriented motorcycle enthusiasts.
Engine:
Complete engine disassembly, assembly, tuning, and repair
Transmission:
Gearbox removal, disassembly, assembly, and maintenance
Fuel System:
Carburetor (likely Linkert or early Keihin/Bendix) adjustment, cleaning, and overhaul; fuel tank and lines
Electrical System:
Ignition system, lighting, charging system (generator/alternator), wiring diagrams, starter motor
Brakes:
Front and rear brake system maintenance and repair (likely drum brakes)
Suspension:
Front fork (likely leading axle type) and rear shock absorber service
Chassis:
Frame, wheels, bearings, and general chassis component servicing
Bodywork:
Fenders, tank, seat, and other body component mounting and adjustment
Maintenance:
Oil changes, filter replacements, spark plug service, chain adjustment
Troubleshooting:
Diagnostic flowcharts and common issue identification
Repair:
Step-by-step instructions for component repair and replacement
Disassembly Assembly:
Complete procedures for taking apart and reassembling major components
Adjustments:
Carburetor, ignition timing, clutch, and brake adjustments
Depth:
Comprehensive: Covers routine maintenance to complete engine and transmission overhauls, detailed electrical diagnostics, and chassis component servicing.
File Type:
Printed Document (or Digital Reprint)
Print Quality:
High-quality paper, clear diagrams and text
Binding:
Stapled or perfect bound (typical for service manuals)
Paper Quality:
Durable paper suitable for workshop environments
Engine Type:
Air-cooled, 45-degree V-twin
Displacement:
74 cubic inches (1200cc)
Bore X Stroke:
3.4375 in. x 4.00 in. (87.31 mm x 101.6 mm)
Compression Ratio:
8.0:1 (typical for this era)
Horsepower:
Approximately 55-60 HP @ 5500 RPM (estimated)
Torque:
Approximately 65-70 lb-ft @ 3500 RPM (estimated)
Carburetor:
Single Linkert M-series carburetor (likely M97/M100) or early Bendix/Keihin, depending on production timing and specific model variant.
Fuel Type:
Unleaded gasoline (Octane rating 91+ recommended for modern fuel).
Ignition Type:
Battery and Coil with Mechanical Breaker Points and Condenser.
Transmission Type:
4-speed Constant Mesh, Foot Shift, Hand Clutch
Optional Transmission:
N/A for factory FXS model
Clutch Type:
Wet multi-plate
Gear Ratios:
Specific ratios available in manual, typically including: 1st: ~2.44:1, 2nd: ~1.83:1, 3rd: ~1.36:1, 4th: 1.00:1
Primary Drive:
Duplex chain
Transmission Fluid:
Harley-Davidson recommended gear oil or equivalent SAE 80W-90 GL-5 gear oil. Capacity typically around 1 pint (0.47L).
Wheelbase:
Approximately 61.5 inches (1562 mm)
Length:
Approximately 89.0 inches (2261 mm)
Seat Height:
Approximately 26.5 inches (673 mm) unladen
Ground Clearance:
Approximately 4.5 inches (114 mm)
Dry Weight:
Approximately 500 lbs (227 kg)
Gross Vehicle Weight Rating:
Not typically published in the same way as modern vehicles, but implies safe operating load.
Safety Ratings:
Not applicable in the modern sense (no crash test ratings for this era of motorcycle).
Braking System:
Front: Drum brake; Rear: Drum brake. Dual leading shoe systems for enhanced performance where applicable.
Lighting:
Headlight, taillight/brake light, turn signals (front and rear), license plate light.
Frame Construction:
Steel frame, designed for stability and rider control.
Infotainment System:
None (This era of motorcycle did not feature electronic infotainment systems).
Driver Assistance Features:
None (Basic motorcycle controls and rider input are the primary means of operation).
Connectivity Features:
None (Mechanical and electrical systems only).
Oil Change:
Every 2,000 - 3,000 miles or annually, whichever comes first.
Primary Chaincase Oil Change:
Recommended at major service intervals, or as per manual, usually coinciding with transmission service.
Spark Plug Replacement:
Every 5,000 - 7,000 miles, or as needed based on inspection.
Drive Belt Inspection And Adjustment:
Regular inspection for wear and proper tension (typically ~1/4 inch deflection at midpoint).
Engine Oil Type:
Harley-Davidson 20W-50 motorcycle oil or equivalent petroleum-based mineral oil. Avoid modern synthetic oils not specified for classic V-twins without proper research.
Engine Oil Capacity:
Approximately 3 quarts (2.8 liters) for the integrated oil tank.
Primary Chaincase Oil Type:
Harley-Davidson primary lubricant or equivalent SAE 50 motorcycle oil.
Primary Chaincase Oil Capacity:
Approximately 1 quart (0.95 liters).
Carburetor Tuning:
Linkert carburetors can be finicky and require specific adjustments; the manual provides essential tuning data.
Ignition Timing:
Mechanical points require regular cleaning, gapping, and timing adjustments for optimal performance.
Oil Leaks:
Common on vintage motorcycles; gasket and seal integrity is crucial. The manual details seal replacement.
Electrical Connections:
Corrosion and loose connections can cause electrical issues; wiring diagrams are vital for troubleshooting.
Brand Legacy:
Harley-Davidson is an iconic American motorcycle manufacturer with a rich history dating back to 1903.
Fx Series Introduction:
The FX line was introduced in 1971 as a response to the growing popularity of choppers and custom bikes, combining Harley's proven V-twin engine with a more radical styling package.
Fxs Super Glide Significance:
The FXS was the initial model in the FX lineup, featuring the FL-style engine in a new frame with styling cues from the custom motorcycle culture.
Production Period:
The FXS was produced from 1971 onwards, with various updates and iterations over the years.
Manufacturing Location:
Milwaukee, Wisconsin, USA
Historical Impact:
The 1971 FXS Super Glide is recognized as a significant model in Harley-Davidson's history for pioneering the 'factory custom' segment and influencing motorcycle design trends.
Collector Value:
Highly sought after by collectors and enthusiasts of vintage Harley-Davidson motorcycles.
Manual Accuracy:
Certified as an authentic factory service manual, providing accurate and official repair information.
