Motorcycle Segment:
Cruiser, custom, performance motorcycle.
Target Audience:
Harley-Davidson FXS owners and technicians seeking to perform maintenance and repairs.
Competitors:
Other American V-twin motorcycles of the era (e.g., Indian, custom builders), and potentially some European models depending on buyer preference.
Model Design:
FXS models, often referred to as 'Low Riders,' were characterized by their laid-back riding position, extended front forks, and custom styling.
Engine Type:
Iconic Shovelhead engine, known for its distinctive sound and character.
Manual Value:
Essential for preserving the originality and functionality of a classic motorcycle, allowing for self-sufficiency in maintenance and repairs.
Engine:
Detailed inspection, disassembly, assembly, troubleshooting, and repair of the Shovelhead V-twin engine (carburetor, ignition, cooling, lubrication systems).
Transmission:
Maintenance, repair, and adjustment of the 4-speed constant mesh transmission.
Drivetrain:
Primary drive, final drive (belt or chain), clutch operation, and components.
Frame And Suspension:
Fork disassembly and repair, rear shock absorber service, frame inspection and maintenance, wheel bearing service.
Brakes:
Front and rear brake system maintenance, hydraulic lines, calipers, master cylinders, and bleeding procedures.
Electrical System:
Wiring diagrams, battery service, lighting system, ignition system troubleshooting, starter motor, charging system (generator/alternator).
Fuel System:
Carburetor tuning and rebuilding (e.g., Keihin, Mikuni), fuel tank service, fuel lines.
Exhaust System:
Exhaust pipe and muffler inspection, replacement, and gasket service.
Body And Trim:
Fender inspection, seat removal and installation, fuel tank mounting, and general cosmetic component care.
Maintenance:
Routine maintenance tasks such as oil changes, filter replacements, spark plug service, chain adjustment, and lubrication points.
Troubleshooting:
Diagnostic procedures for common issues related to starting, running, braking, and electrical systems.
Repair:
Step-by-step instructions for component disassembly, cleaning, inspection, repair, and reassembly.
Specifications:
Torque values, clearances, fluid capacities, and other critical technical data.
Depth:
Comprehensive; covers everything from basic adjustments and fluid changes to full engine rebuilds, transmission overhauls, and complex electrical diagnostics.
File Type:
Likely PDF (for downloadable versions)
Searchability:
Searchable text is highly desirable for quick information retrieval.
Image Resolution:
High-resolution images and clear diagrams are essential for accurate procedure following.
Binding:
N/A (for downloadable, but original manuals were typically bound)
Paper Quality:
N/A (for downloadable, but original manuals used durable, often glossy paper)
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Displacement:
80 cubic inches (1310 cc)
Bore X Stroke:
3.4375 in x 4.25 in (87.3 mm x 108 mm)
Compression Ratio:
Typically around 8.5:1 (varies slightly)
Horsepower:
Estimated 60-65 HP (at crank, actual figures often not officially published)
Torque:
Estimated 65-70 ft-lbs (at crank, actual figures often not officially published)
Carburetor:
Typically a Keihin Butterfly, or Zenith/AMF models, and aftermarket Mikuni VM or HSR options were common upgrades.
Fuel Type:
Unleaded gasoline, typically with an octane rating of 87 or higher.
Oil Type:
Varies: SAE 20W-50 motorcycle-specific oil or a blend with an API service category suitable for V-twins (e.g., SG, SH, SJ). Some owners opt for mineral or synthetic motorcycle oils. Always consult the manual for exact specifications.
Ignition System:
Breaker point ignition system (later models could have electronic ignition conversions).
Transmission Type:
4-speed, constant mesh, manual foot shift
Clutch Type:
Wet, multi-plate, cable-operated
Transmission Options:
No factory optional transmissions for this specific model/year, but aftermarket upgrades exist.
Primary Drive:
Duplex chain
Transmission Fluid:
SAE 50 or 60W motorcycle-specific gear oil. Manual will specify exact type and capacity.
Wheelbase:
Approximately 62.5 inches (1588 mm)
Length:
Approximately 88.5 inches (2248 mm)
Seat Height:
Approximately 26 inches (660 mm) (Low Rider designation)
Dry Weight:
Approximately 550-580 lbs (250-263 kg)
Fuel Capacity:
Typically 3.5 - 4.0 gallons (13.2 - 15.1 liters)
Safety Ratings:
Motorcycle safety is primarily determined by rider skill and adherence to traffic laws. No formal crash test ratings like cars.
Braking System:
Dual-disc front brake, single-disc rear brake (hydraulic).
Lighting:
Halogen headlight, taillight, brake light, turn signals.
Frame Construction:
Steel tube frame, designed for stability and rider comfort.
Rider Ergonomics:
Low seat height and forward-mounted controls for a relaxed riding posture.
Oil Change Interval:
Typically every 2,000-3,000 miles or 6 months, whichever comes first. Manual will provide definitive schedule.
Primary Chain Tension:
Check and adjust periodically, often every 5,000-10,000 miles, depending on wear.
Spark Plug Replacement:
Every 5,000-7,000 miles.
Engine Oil Capacity:
Approximately 3 quarts (2.8 liters) including filter. Manual for exact capacity.
Transmission Oil Capacity:
Approximately 1 quart (0.95 liters). Manual for exact capacity.
Brake Fluid Type:
DOT 4 or DOT 5 (Silicone based), depending on original specifications and any system modifications. Manual is critical here.
Shovels Head Leaks:
Commonly associated with oil leaks from engine case, pushrod tubes, and gaskets due to age and design. Manual provides sealing procedures.
Carburetor Tuning:
Requires periodic adjustment and cleaning, especially with ethanol-blend fuels. Manual details tuning procedures.
Electrical Issues:
Aging wiring harnesses and components can lead to intermittent electrical problems. Wiring diagrams in the manual are essential for diagnosis.
Starter Clutch:
Can wear over time, leading to symptoms of the starter not engaging properly. Manual covers starter service.
Brand Legacy:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history of building powerful, distinctive motorcycles.
Shovelhead Era:
The Shovelhead engine replaced the Panhead in 1966 and was produced until the introduction of the Evolution (Evo) engine in 1984. The FXS model line was a popular variant within this era.
Fxs Development:
The FXS model represented Harley-Davidson's response to the growing 'custom' or 'chopper' trend, offering a factory-built option with a lower seat height and unique styling cues.
Production Location:
Milwaukee, Wisconsin, USA
Production Period:
Shovelhead engines were produced from 1966 to 1984. The FXS model line existed within this period.
