Target Audience:
Harley-Davidson owners, technicians, and enthusiasts seeking in-depth repair knowledge for these iconic models.
Value Proposition:
Provides essential information for maintaining and repairing classic Harley-Davidson motorcycles, saving on dealership service costs.
Feature 1:
Extensive coverage of the Shovelhead engine, the heart of these models.
Feature 2:
Detailed electrical schematics crucial for troubleshooting vintage bikes.
Feature 3:
Inclusion of factory specifications and procedures.
Engine System:
Shovelhead V-twin engine, including disassembly, assembly, tuning, and troubleshooting.
Fuel System:
Carburetor (likely Keihin butterfly or Linkert variations), fuel lines, fuel pump, and tank maintenance.
Ignition System:
Points ignition, coil, spark plugs, timing, and troubleshooting.
Transmission System:
4-speed constant mesh transmission, clutch, shift mechanism, and lubrication.
Electrical System:
Wiring diagrams, charging system (alternator/generator), lighting, battery, starter motor, and switches.
Brake System:
Front and rear drum brakes, brake fluid, lines, and adjustments.
Suspension System:
Front fork (likely FL-style hydraulic) and rear shock absorbers, including seals and oil changes.
Frame And Body:
Frame inspection, body panel removal and installation, fairing (if applicable), fenders, and seating.
Wheels And Tires:
Wheel bearing maintenance, tire pressure, and installation.
Maintenance Procedures:
Routine maintenance, oil changes, filter replacements, lubrication points, and tune-ups.
Repair Procedures:
Step-by-step instructions for engine rebuilds, transmission overhauls, electrical component replacement, and brake service.
Troubleshooting Guides:
Diagnostic procedures for common problems, symptoms, and potential causes.
Depth Of Information:
Detailed technical specifications, torque values, clearances, and diagnostic charts.
Rebuild Instructions:
Comprehensive instructions for complete engine and transmission rebuilds.
Diagnostic Capabilities:
Advanced diagnostic procedures for electrical and mechanical systems.
Engine Type:
Air-cooled, V-twin, OHV (Overhead Valve)
Engine Displacement:
74 cubic inches (1200cc), 80 cubic inches (1340cc) variations likely for later models within this range.
Bore X Stroke:
For 74ci: 3.4375 in. x 4.00 in.
Compression Ratio:
Typically around 7.0:1 to 7.5:1 for standard models.
Horsepower Estimated:
Approximately 60-65 HP at 5000 RPM.
Torque Estimated:
Approximately 75-80 lb-ft at 3000 RPM.
Carburetor Type:
Harley-Davidson (Linkert or Keihin butterfly type common), or aftermarket equivalents.
Fuel Capacity:
Approx. 4.0 gallons for primary tank.
Fuel Type:
Unleaded gasoline (Octane rating suitable for V-twins, typically 87+ RON).
Transmission Type:
4-speed constant mesh, foot-shift, hand-clutch operation.
Optional Transmissions:
Not applicable for factory models of this era; aftermarket conversions existed.
Clutch Type:
Wet, multi-plate
Transmission Fluid Type:
Harley-Davidson Formula+ or equivalent primary lubricant (e.g., SAE 50 motorcycle oil).
Gear Ratios:
Specific ratios will be detailed in the manual, but typical for 4-speed Harley transmissions of this era.
Safety Standards:
N/A (Motorcycle safety standards were less formalized than for automobiles).
Braking System:
Dual-action front drum brake, rear drum brake.
Lighting System:
Headlight, taillight, brake light, turn signals.
Oil Change Interval:
Typically every 2,000-3,000 miles or annually, whichever comes first.
Primary Fluid Change Interval:
Every 5,000 miles or annually.
Spark Plug Replacement:
Every 5,000-10,000 miles, depending on plug type.
Engine Oil Type:
Harley-Davidson 20W-50, or similar high-quality motorcycle-specific oil.
Primary Fluid Type:
Harley-Davidson Formula+, or SAE 50 motorcycle oil.
Transmission Fluid Type:
Harley-Davidson Formula+, or SAE 50 motorcycle oil.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (ensure compatibility with drum brake systems).
Common Issue 1:
Shovelhead oil leaks (often from pushrod tubes, rocker boxes, or transmission seals).
Common Issue 2:
Carburetor adjustment and tuning; potential for Keihin butterfly or Linkert issues.
Common Issue 3:
Electrical system maintenance, especially points and ignition timing.
Common Issue 4:
Drum brake performance and adjustment.
Common Issue 5:
Gasket and seal deterioration due to age.
Oil Filter Part Number:
Likely equivalent to Harley-Davidson P/N 63811-71T or similar spin-on filters.
Air Filter Part Number:
Specific part number varies by model/carburetor, but aftermarket equivalents are widely available.
Brand Origins:
Harley-Davidson, founded in Milwaukee, Wisconsin, in 1903, is one of America's most iconic motorcycle manufacturers.
Electra Glide Lineage:
The Electra Glide, introduced in 1965, became the flagship touring motorcycle for Harley-Davidson, defining the 'big twin' cruiser aesthetic.
Super Glide Lineage:
The Super Glide, first introduced in 1971 as the FX 1200, blended the FL chassis with the Sportster's engine, creating the 'cruiser' style.
Production Era:
These years (1978-1980) represent a significant period in the Shovelhead era, known for its distinctive styling and performance characteristics.
Manufacturing Location:
Milwaukee, Wisconsin, USA
