Era Significance:
Represents a pivotal era in Harley-Davidson's evolution, transitioning towards larger displacement V-twins and more touring-oriented models.
Competitors:
Competed with other large-displacement American motorcycles and emerging Japanese touring bikes of the early 1970s.
Design Philosophy:
Emphasis on robust construction, V-twin power delivery, and long-distance comfort, defining the classic Harley-Davidson experience.
Engine:
Shovelhead V-Twin Engine Overhaul, Tuning, and Repair
Transmission:
4-Speed Constant Mesh Transmission Service and Rebuild
Fuel System:
Carburetor (Keihin, Linkert) Adjustments and Overhaul, Fuel Tank and Lines Service
Electrical System:
Ignition System (Points, Condenser), Charging System (Generator/Alternator), Lighting, Wiring Diagrams, Battery Service
Frame And Suspension:
Frame Inspection, Front Forks (Dampening, Seals), Rear Shock Absorbers, Swingarm Assembly
Brakes:
Front Disc Brake System (Calipers, Master Cylinder), Rear Drum Brake System (Shoes, Drums)
Wheels And Tires:
Wheel Bearing Service, Tire Replacement, Spoke Adjustment
Bodywork And Trim:
Fenders, Fairings (If Equipped), Saddlebags, Handlebars, Seat Assembly
Maintenance:
Routine Maintenance Checks, Lubrication Points, Filter Replacements, Fluid Changes
Troubleshooting:
Diagnostic Procedures for Common Issues, Fault Finding Charts
Repair:
Component Disassembly, Reassembly, Component Repair and Replacement
Rebuild:
Complete Engine and Transmission Rebuild Procedures
Restoration:
Guidance for Period-Correct Restoration Projects
Depth:
Comprehensive, from basic tune-ups to complete engine and transmission overhauls and chassis component repair.
File Format:
PDF (Portable Document Format)
Print Quality:
High-resolution scans, suitable for printing individual pages or the entire manual.
Searchable Text:
Likely OCR-enabled for keyword searching within the PDF content.
Binding Type:
N/A (Digital PDF)
Paper Type:
N/A (Digital PDF)
Page Count:
Hundreds of pages (specific count not provided, but typical for full service manuals of this era).
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Displacement:
74 cubic inches (1200cc) for Electra Glide, often 74ci for Super Glide, with potential for 80ci (1340cc) variations or upgrades.
Bore X Stroke:
Approx. 3.4375 in. x 4.000 in. (87.31 mm x 101.60 mm)
Compression Ratio:
Typically around 7.0:1 to 7.5:1 for stock engines of this period.
Horsepower Est:
Approx. 60-65 HP (at the crankshaft), though precise figures can vary by tuning and specific model year.
Torque Est:
Significant low-end torque, typical for Harley-Davidson V-twins of this era.
Carburetor:
Primarily Keihin Butterfly or Linkert Carburetors. Specifications for jetting, float levels, and idle mixture are crucial and detailed in the manual.
Fuel Type:
Leaded gasoline (prior to unleaded fuel widespread adoption). Octane rating specifications will be provided.
Ignition Type:
Mechanical Ignition Points and Condenser, Distributor-less on some models.
Transmission Type:
4-Speed Constant Mesh, Foot Shift, Hand Clutch
Optional Transmission:
N/A for this period; 4-speed was standard across the board.
Clutch Type:
Wet, multi-plate, cable-actuated clutch.
Gear Ratios:
Specific gear ratios for each of the 4 speeds will be detailed in the manual for torque multiplication and highway cruising.
Transmission Fluid:
Specification for primary drive chain lubricant (often dedicated primary fluid or engine oil).
Wheelbase:
Varies slightly by model year and configuration, typically around 60-63 inches.
Length:
Approximately 90-95 inches, depending on fairing and saddlebag configuration.
Dry Weight:
Approx. 650-700 lbs (depending on model and options).
Gross Vehicle Weight Rating:
Will be specified in the manual, important for load carrying capacity.
Safety Ratings:
Modern safety rating systems were not applicable to motorcycles of this era. Emphasis on rider skill and machine maintenance.
Active Safety Features:
Dual-grip controls (throttle, clutch), foot brake pedal, front and rear braking systems. Tire selection and maintenance critical.
Passive Safety Features:
Robust frame construction, rider protection through machine stability. Rider protective gear is essential and implicitly advised.
Infotainment Systems:
Very rudimentary by modern standards. May include a basic speedometer, odometer, and ammeter. Some Electra Glides might have an AM radio option.
Driver Assistance Features:
None by modern definitions. Rider relies on skill and direct control of the vehicle.
Connectivity Features:
None. This era predates consumer motorcycle connectivity.
Oil Change Interval:
Typically every 2,000-3,000 miles or 6 months, as specified in the manual. Oil filter replacement often coincides with oil changes.
Spark Plug Replacement:
Recommended at intervals specified in the manual, often around 5,000-10,000 miles, depending on plug type and condition.
Chain Adjustment:
Primary and final drive chain tension should be checked and adjusted periodically as per manual recommendations.
Engine Oil Type:
Mineral-based motorcycle-specific oils, typically SAE 20W50. Manual will specify exact viscosity and API service classification.
Transmission Primary Fluid:
Harley-Davidson Primary Chaincase Lubricant or equivalent HD-approved fluid. Manual will detail type and capacity.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid, depending on the system's original specification. Manual will be critical for this.
Fork Oil Type:
Specific grade of hydraulic fork oil. Manual will specify viscosity (e.g., 10W, 15W) and quantity per fork leg.
Shovellhead Wear Points:
Potential for oil leaks at rocker boxes, pushrod tubes, and crankcase seals. Valve guides and tappets can also be wear items.
Transmission Engagement:
Clutch adjustment and worn clutch plates can affect smooth gear engagement. Shift pawl and internal linkage can also require attention.
Electrical Gremlins:
Wiring harness integrity, regulator/rectifier (if applicable), and ignition switch can be prone to issues over time.
Carburetor Tuning:
Carburetors require regular adjustment and cleaning to maintain optimal performance and fuel economy. Linkert carbs are particularly sensitive to wear.
Harley Davidson Legacy:
Continuation of Harley-Davidson's long-standing reputation for V-twin motorcycles, born from utility and evolving into iconic cruisers and touring machines.
Electra Glide Evolution:
Evolved from the Hydra-Glide and Panhead eras, incorporating the Shovelhead engine and significant design updates for touring comfort and performance.
Super Glide Evolution:
Introduced as a more 'custom' or 'performance' oriented model compared to the Electra Glide, often with different styling and less touring-focused accessories.
Manufacturing Location:
Milwaukee, Wisconsin, USA.
Production Context:
These years represent a period of transition for Harley-Davidson, facing increased competition and adapting its product line.
