Harley Davidson Shovelhead FXS Motorcycle Complete Workshop Service Repair Manual 1981

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🏷️ Basic Information Identification Make: Harley-Davidson Model: FXS Year: 1981 Codes Engine Code: Shovelhead Chassis Code: FXS 👋 Introduction Market Position Motorcycle Segment: Cruiser, custom, performance motorcycle. Target Audience: Harley-Davidson...

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类型: Motorcycle

斯库: 526235

标签: 1981 Harley Davidson Misc Motorcycle Motorcycles Shovelhead FXS

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Description

🏷️ Basic Information

Identification

Make:

Harley-Davidson

Model:

Year:

Codes

Engine Code:

Shovelhead

Chassis Code:

👋 Introduction

Market Position

Motorcycle Segment:

Cruiser, custom, performance motorcycle.

Target Audience:

Harley-Davidson FXS owners and technicians seeking to perform maintenance and repairs.

Competitive Analysis

Competitors:

Other American V-twin motorcycles of the era (e.g., Indian, custom builders), and potentially some European models depending on buyer preference.

Key Features

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.

📋 Manual Details

Coverage Areas

Manual Type:

Complete Workshop Service Repair Manual

Language:

English

Format:

Downloadable (likely PDF)

Page Count:

Estimated 500-800 pages (typical for comprehensive service manuals of this era)

📖 Manual Coverage

Systems Covered

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.

Procedures Included

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.

Technical Depth

Depth:

Comprehensive; covers everything from basic adjustments and fluid changes to full engine rebuilds, transmission overhauls, and complex electrical diagnostics.

📊 Manual Specifications

File Format

File Type:

Likely PDF (for downloadable versions)

Searchability:

Searchable text is highly desirable for quick information retrieval.

Print Quality

Image Resolution:

High-resolution images and clear diagrams are essential for accurate procedure following.

Binding Type

Binding:

N/A (for downloadable, but original manuals were typically bound)

Paper Type

Paper Quality:

N/A (for downloadable, but original manuals used durable, often glossy paper)

⚙️ Engine Specifications

Primary Engine

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)

Performance

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)

Fuel System

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.

Lubrication

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

Ignition System:

Breaker point ignition system (later models could have electronic ignition conversions).

🔧 Transmission

Standard

Transmission Type:

4-speed, constant mesh, manual foot shift

Clutch Type:

Wet, multi-plate, cable-operated

Optional

Transmission Options:

No factory optional transmissions for this specific model/year, but aftermarket upgrades exist.

Features

Primary Drive:

Duplex chain

Final Drive:

Belt drive

Transmission Fluid:

SAE 50 or 60W motorcycle-specific gear oil. Manual will specify exact type and capacity.

📐 Dimensions

Exterior

Wheelbase:

Approximately 62.5 inches (1588 mm)

Length:

Approximately 88.5 inches (2248 mm)

Seat Height:

Approximately 26 inches (660 mm) (Low Rider designation)

Weights

Dry Weight:

Approximately 550-580 lbs (250-263 kg)

Fuel Capacity:

Typically 3.5 - 4.0 gallons (13.2 - 15.1 liters)

🛡️ Safety Features

Ratings

Safety Ratings:

Motorcycle safety is primarily determined by rider skill and adherence to traffic laws. No formal crash test ratings like cars.

Active Features

Braking System:

Dual-disc front brake, single-disc rear brake (hydraulic).

Lighting:

Halogen headlight, taillight, brake light, turn signals.

Passive Features

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.

💡 Technology Features

Infotainment

Infotainment System:

Not applicable to this era of motorcycle. Focus is on mechanical and electrical function.

Driver Assistance

Driver Assistance Features:

None. Safety is reliant on mechanical systems and rider awareness.

Connectivity

Connectivity Features:

None. Primarily mechanical and basic electrical systems.

🔧 Maintenance

Service Intervals

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.

Fluid Specifications

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.

Known Issues

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.

📚 Vehicle History

Brand Heritage

Brand Legacy:

Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer with a rich history of building powerful, distinctive motorcycles.

Model Evolution

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

Production Location:

Milwaukee, Wisconsin, USA

Production Period:

Shovelhead engines were produced from 1966 to 1984. The FXS model line existed within this period.

🏆 Awards & Recognition

Recognitions

Historical Significance:

The Shovelhead engine and the FXS model are significant within Harley-Davidson's history, representing a period of evolution and adaptation to market trends. They are highly sought after by collectors and enthusiasts.

Enthusiast Acclaim:

The FXS Low Rider is often celebrated for its iconic styling and the raw experience it offers, making it a beloved classic.