Historical Context:
These models represent a significant era for Harley-Davidson, offering powerful V-twin engines and a comfortable touring platform, particularly the Electra Glide. They were designed for long-distance riding and established Harley-Davidson's dominance in the large-displacement cruiser market.
Key Competitors:
While Harley-Davidson was in a league of its own in many aspects during this period, competitors in the larger displacement motorcycle segment included models from British manufacturers (e.g., Triumph Bonneville variants) and increasingly, Japanese manufacturers moving into larger engine sizes.
Model Highlights:
The Electra Glide was known for its large fairing, saddlebags, and comfortable seating for touring. The Super Glide offered a more stripped-down, performance-oriented package, often serving as a base for customization. Both featured the iconic Harley-Davidson V-twin engine.
Coverage Years:
1970, 1971, 1972, 1973, 1974, 1975, 1976, 1977, 1978
Motorcycle Types:
Electra Glide, Super Glide
Type:
Workshop Service Repair Manual
Engine Mechanical:
Detailed disassembly, inspection, repair, and reassembly of all engine components including cylinders, pistons, rings, crankshaft, connecting rods, camshafts, valve train, oil pump, and primary drive.
Fuel System:
Carburetor (e.g., Keihin, Linkert variants), fuel tank, fuel lines, fuel filter, and fuel pump (if applicable) servicing and adjustment.
Ignition System:
Points, condenser, ignition coil, spark plugs, wiring, and timing procedures for Shovelhead engines.
Transmission Drivetrain:
4-speed and possibly 3-speed transmission overhaul, clutch service, chain drive maintenance, and final drive assembly.
Electrical System:
Wiring diagrams, battery, charging system (generator/alternator), lighting, starter motor, ignition switch, and accessory circuits.
Suspension Steering:
Front fork (e.g., leading-link, telescopic variations), rear shock absorbers, swingarm, steering head bearings, and wheel bearings service.
Braking System:
Front and rear brake caliper service, master cylinder overhaul, brake lines, brake pads/shoes replacement, and bleeding procedures.
Frame Bodywork:
Frame inspection, body panel removal and installation, fairing (Electra Glide), saddlebags, and exhaust system maintenance.
Routine Maintenance:
Oil changes, filter replacement, chain lubrication and adjustment, tire pressure checks, brake adjustments, and general inspection.
Troubleshooting:
Systematic diagnostic procedures for common performance issues, starting problems, electrical faults, and running irregularities.
Component Rebuild:
Detailed instructions for rebuilding carburetors, starters, generators, transmissions, and engine components.
Electrical Diagnostics:
Interpreting wiring diagrams, testing electrical components, and tracing faults within the motorcycle's electrical system.
Torque Specifications:
Precise torque values for critical fasteners across all major components.
Depth Level:
Comprehensive, covering everything from basic rider maintenance to complete engine and transmission rebuilds, including detailed diagnostics.
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Engine Family:
Shovelhead
Displacement Cc:
1200cc (74 cu. in.) is common, with potential 80 cu. in. (1340cc) variants appearing later in the 70s.
Bore X Stroke:
Approximately 3.4375 in. x 4.25 in. (for 74 cu. in.)
Horsepower Approx:
50-60 HP (estimated, depending on specific model year and tuning)
Torque Ft Lbs Approx:
60-70 ft-lbs (estimated)
Carburetor Type:
Various models, commonly Harley-Davidson Linkert or Keihin butterfly carburetors.
Fuel Delivery:
Gravity feed from fuel tank, sometimes with an added fuel pump depending on specific setup.
Oil System:
Dry sump with oil tank separate from the engine crankcase.
Safety Standards:
Motorcycle safety standards of the era, focused on mechanical integrity and basic rider controls. Modern safety rating systems were not applicable.
Braking System Type:
Hydraulic disc brakes became more common through the 70s, often single front disc and rear drum, or dual front discs on some later models. Earlier models may have drum brakes front and rear.
Lighting:
Headlight, tail light, brake light, turn signals (often optional or integrated into bodywork).
Oil Change Interval Miles:
Typically every 2,000-3,000 miles or as per manufacturer's recommendation (check manual for exact interval).
Primary Chain Tension Check:
Regular checks recommended, often every few thousand miles, as chain stretch can occur.
Spark Plug Replacement Miles:
Typically every 5,000-10,000 miles, depending on plug type and usage.
Engine Oil Type:
API CD or CE rated diesel engine oil (e.g., 20W-50) is often recommended for these Shovelhead engines due to their design and operating temperatures. Harley-Davidson specifically formulated oils are ideal.
Primary Chain Case Oil:
Typically Harley-Davidson primary chain case lubricant or a suitable equivalent.
Transmission Oil Type:
Harley-Davidson transmission lubricant or an SAE 50 gear oil is commonly used.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid for hydraulic systems.
Oil Leaks:
Common across vintage motorcycles due to gasket and seal aging. Crankshaft seal, primary cover, and base gasket leaks are frequent.
Carburetor Tuning:
Carburetors (especially older Linkert models) can be finicky and require periodic adjustment and cleaning for optimal performance.
Electrical Reliability:
Older wiring harnesses can degrade, leading to intermittent electrical issues. Points ignition systems require regular adjustment.
Shifter Mechanism:
Wear in the shift drum or linkage can lead to difficulty shifting gears.
Charging System:
Generators and early alternators can be prone to wear or failure, requiring attention to maintain battery charge.
Harley Davidson Legacy:
Founded in 1903, Harley-Davidson is one of America's most iconic motorcycle manufacturers, synonymous with the V-twin engine, freedom, and the open road. This period represents a crucial transition and continued development of their core cruiser and touring platforms.
Electra Glide Development:
Introduced in the late 1960s, the Electra Glide quickly became the flagship touring motorcycle for Harley-Davidson, characterized by its distinctive 'batwing' fairing and robust chassis designed for comfort and long-distance travel.
Super Glide Development:
The Super Glide, often seen as a precursor to modern cruisers, offered a more minimalist design with a distinctive 'dogleg' front fork and a blend of touring and performance features. It was a versatile platform.
Manufacturing Era:
The covered years span the transition and development of the Shovelhead engine and related chassis designs within Harley-Davidson's production.
Iconic Status:
Harley-Davidson motorcycles from this era are considered highly collectible and iconic pieces of American industrial design and automotive history.
User Satisfaction:
Highly regarded by enthusiasts for their character, sound, and robust build. Ownership often involves a passion for maintaining and riding classic machinery.
Manual Accuracy:
Authentic workshop manuals provide the precise procedures and specifications required for accurate and safe servicing, critical for preserving the value and integrity of these vintage machines.
