Motorcycle Segment:
Cruiser / Custom
Target Audience:
Harley-Davidson owners, technicians, and enthusiasts performing maintenance and repairs.
Competitor Models 1980:
Indian Chief, various British and Japanese motorcycles (though distinct in style and engineering).
Model Distinction:
The FXWG (Wide Glide) is characterized by its raked-out front end, often with a prominent headlight nacelle and ape hanger handlebars, offering a distinctive custom look.
Engine Heritage:
Represents a significant era for Harley-Davidson, featuring the air-cooled V-twin 'Shovelhead' engine known for its character and torque.
Engine:
Complete engine overhaul, top end, bottom end, lubrication system, ignition system, carburetor tuning and rebuilding (e.g., Keihin Butterfly).
Transmission:
4-speed constant mesh transmission service, clutch operation, primary drive system maintenance.
Electrical System:
Wiring diagrams, charging system (alternator, regulator), ignition system (points, coils, spark plugs), lighting, starting system, battery maintenance.
Chassis And Suspension:
Frame inspection and repair, front fork service (oil changes, seal replacement), rear shock absorber maintenance, steering head bearing adjustment.
Braking System:
Front and rear brake caliper service, master cylinder overhaul, brake fluid replacement, pad inspection and replacement.
Fuel System:
Fuel tank service, fuel lines, fuel filter maintenance, carburetor operation and adjustment.
Bodywork And Trim:
Fender removal and installation, seat maintenance, fuel tank mounting, exhaust system service.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug replacement, air filter cleaning/replacement.
Troubleshooting:
Diagnosing common performance issues, electrical faults, starting problems, and operational anomalies.
Repair Procedures:
Step-by-step instructions for component disassembly, cleaning, inspection, repair, and reassembly.
Diagnostic Charts:
Flowcharts and symptom-based diagnostic guides for efficient problem resolution.
Diagnostic Capability:
Advanced diagnostic procedures for engine, electrical, and mechanical systems.
Rebuild Instructions:
Detailed instructions for complete engine, transmission, and carburetor rebuilds.
Specification Reference:
Includes torque specifications, clearances, timing marks, and other critical dimensional data.
Engine Type:
Air-cooled, 45-degree V-twin
Displacement:
80 cubic inches (1311 cc)
Bore X Stroke:
3.4375 in. x 4.25 in. (87.3 mm x 108 mm)
Compression Ratio:
Typically 8.0:1 or 8.5:1 depending on specific tuning.
Valve Train:
Overhead valves (OHV), pushrod actuated
Cylinder Heads:
Cast iron
Engine Oil Capacity:
Approximately 3 quarts (2.8 liters) with filter change. Specifics in manual.
Horsepower Estimate:
Approximately 60-65 HP at 5500 RPM (varies with tuning).
Torque Estimate:
Approximately 70-75 ft-lbs at 3500 RPM (varies with tuning).
Carburetor:
Keihin butterfly type (e.g., 38mm CV - Constant Velocity, or earlier models might use different types).
Fuel Type:
Unleaded gasoline, 87 octane or higher recommended.
Fuel Delivery:
Gravity feed from fuel tank via fuel lines.
Transmission Type:
4-speed constant mesh, foot shift, hand clutch.
Primary Drive:
Duplex chain, wet clutch.
Clutch Type:
Multi-plate wet clutch.
Transmission Fluid:
Harley-Davidson recommends specific transmission fluid (e.g., Formula+ or equivalent). Consult manual for capacity and specifications.
Wheelbase:
Approx. 63.5 inches (1613 mm) - varies slightly with front end configuration.
Length:
Approx. 91 inches (2311 mm).
Handlebar Style:
Wide Glide typically features ape hanger or similar tall, swept-back handlebars.
Dry Weight:
Approx. 550-580 lbs (250-263 kg) - varies with equipment.
Gross Vehicle Weight Rating:
Consult manual for specific GVWR.
Crash Test Ratings:
N/A (Motorcycle safety testing standards differed significantly in 1980 and are not directly comparable to modern automotive standards).
Braking System Type:
Dual disc front brake, single disc rear brake.
Lighting:
Headlight, taillight, brake light, turn signals, indicator lights.
Frame Construction:
Steel tube frame.
Oil Change Interval:
Typically every 2,500-3,000 miles or annually, whichever comes first. Consult manual for exact recommendation.
Primary Chain Adjustment:
Check and adjust approximately every 5,000 miles. Manual provides specific procedures.
Spark Plug Replacement:
Recommended every 5,000-10,000 miles, depending on plug type. Manual will specify.
Engine Oil:
Harley-Davidson 20W50 motorcycle oil (or equivalent API SG or higher rated oil). Check manual for specific API rating and viscosity.
Transmission Fluid:
Harley-Davidson Formula+ or equivalent. Specific weight and type crucial for longevity.
Brake Fluid:
DOT 4 brake fluid is typically recommended for the hydraulic braking system. Always check manual for specific DOT rating.
Oil Leaks:
Common in older Shovelheads due to aging seals and gaskets. Manual provides seal replacement procedures.
Carburetor Tuning:
May require periodic adjustment or rebuilding due to wear and fuel variability. Manual covers tuning procedures.
Ignition Timing:
Points and condenser ignition systems require periodic inspection and adjustment. Manual details timing procedures.
Pushrod Tubes:
Pushrod tube seals can degrade, leading to oil leaks. Manual covers their replacement.
Brand Founding:
Harley-Davidson Motor Company founded in 1903.
Brand Philosophy:
Iconic American motorcycle manufacturer known for its V-twin engines and long-standing tradition.
Shovelhead Introduction:
The Shovelhead engine replaced the Panhead and was produced from 1966 to 1984.
Fxwg Development:
The FXWG model, introduced in 1979, was a factory custom model designed to capture the spirit of the chopper era, featuring the 'Wide Glide' front-end geometry.
Production Era:
1980 represents a key year in the Shovelhead era.
Manufacturing Location:
Milwaukee, Wisconsin, USA.
