Market Position:
Essential technical resource for owners and mechanics of classic Harley-Davidson motorcycles from the early 1970s, a period of significant evolution for the brand.
Competitive Analysis:
Provides in-depth, factory-level technical data that surpasses generic aftermarket guides, crucial for maintaining the performance and authenticity of these vintage machines.
Key Features:
Comprehensive coverage of all models and years, detailed repair procedures, diagnostic information, exploded diagrams, wiring schematics, and specifications.
Coverage Areas:
All 1970-1972 Harley-Davidson Electra Glide and Super Glide models
Page Count:
Comprehensive (Exact page count not specified, but described as containing all technical information)
Manual Type:
Workshop Service Repair Manual
Format:
Instant Download (Implies digital format, likely PDF)
Systems Covered:
Engine, Transmission, Drivetrain, Chassis, Suspension, Brakes, Electrical System, Fuel System, Ignition System, Lubrication System, Cooling System (where applicable), Bodywork, Frame, Controls, Accessories, Troubleshooting, Maintenance, Overhaul Procedures
Electrical System Details:
Complete wiring diagrams, battery servicing, charging system (generator or alternator), lighting circuits (headlight, taillight, turn signals), ignition switch, starter system, horn, and accessory wiring.
Procedures Included:
Engine disassembly and reassembly, carburetor tuning and rebuilding, ignition system testing and adjustment, transmission overhaul, clutch service, brake system maintenance and repair, wheel and tire servicing, suspension adjustments and component replacement, electrical system diagnostics and wiring, frame inspection and repair, routine maintenance tasks, troubleshooting common problems, complete rebuild procedures
Troubleshooting Methodology:
Systematic troubleshooting guides for common performance issues, diagnostic trees for electrical faults, and guidance on identifying and rectifying mechanical wear.
Technical Depth:
Detailed technical information for all repairs, including diagnostic procedures, component specifications, torque values, and step-by-step instructions for complex overhauls. Suitable for professional mechanics and experienced DIY enthusiasts.
Special Tools Required:
Identification and usage of specialized Harley-Davidson tools for engine, transmission, and other component servicing, often including specific pullers, gauges, and alignment tools.
Engine Type:
Air-cooled, four-stroke, OHV V-twin
Engine Displacement:
74 cubic inches (1200cc) Shovelhead engine (primary for Electra Glide), some Super Glide models may also feature 80 cubic inches (1300cc)
Bore X Stroke:
3.4375 in x 4.00 in (approximate for 74ci)
Compression Ratio:
Approximately 7.0:1 to 8.0:1 (varies by specific year and model variant)
Engine Cooling:
Air-cooled
Horsepower:
Estimated 50-60 HP (at the crankshaft, varies by specific tune and model)
Torque:
Estimated 60-70 ft-lbs (at the crankshaft, varies by specific tune and model)
Fuel Delivery:
Carburetor (e.g., Keihin butterfly carb, Linkert type may still be present on early models, S&S Super E/B aftermarket options common)
Fuel Type:
Unleaded gasoline, minimum octane rating typically 87 (AKI) or higher, check specific manual recommendations.
Carburetor Model:
Commonly Keihin Butterfly, Linkert (earlier or service replacements), or S&S Super (aftermarket)
Ignition Type:
Battery and Coil, Breaker Points Ignition System
Ignition Timing:
Specifications for static and dynamic timing using a timing light, critical for optimal performance and longevity.
Oil Type:
Harley-Davidson recommends specific motorcycle-grade oils. Commonly SAE 20W-50 or SAE 50 weight, mineral-based oils are suitable for this era. Check manual for specific part numbers like HD 360.
Oil Capacity:
Approximately 3-4 quarts (3-3.8 liters) including oil filter (if equipped).
Transmission Type:
4-speed Constant Mesh Manual Transmission
Optional Transmission:
N/A for these specific factory models.
Clutch Type:
Wet multi-plate clutch
Transmission Fluid Type:
Harley-Davidson recommended transmission oil or equivalent SAE 75W-90 gear oil (check specific manual recommendations for variations).
Gear Ratios:
Detailed gear ratios for each of the 4 speeds, crucial for understanding performance characteristics and for parts interchangeability.
Wheelbase:
Approximately 60.5 - 62.5 inches (1537 - 1588 mm), varies by model and year.
Length:
Approximately 90 - 95 inches (2286 - 2413 mm).
Ground Clearance:
Specifications for safe ground clearance, important for cornering and avoiding damage.
Dry Weight:
Approximately 600 - 700 lbs (272 - 318 kg), varies significantly by model and accessories.
Safety Ratings:
N/A (Motorcycle safety standards and reporting differ significantly from automobiles and were less formalized in this era.)
Active Features:
Disc front brake, drum rear brake (early models may have drum front brake depending on exact variant). Effective rider control is the primary active safety feature.
Passive Features:
Robust frame construction. Rider preparedness and protective gear are the most critical passive safety elements.
Infotainment System:
Basic, if present. Typically limited to AM radio (optional), analog gauges for speedometer, tachometer, oil pressure, and voltmeter.
Driver Assistance Features:
None. Rider is the primary driver and safety system.
Connectivity Features:
None. Focus is on mechanical reliability and riding experience.
Engine Oil Change Interval:
Every 2,000-3,000 miles or annually, whichever comes first (refer to manual for precise recommendation).
Transmission Oil Change Interval:
Every 4,000-6,000 miles or annually.
Primary Chain Case Oil Change Interval:
Every 2,000-3,000 miles or annually.
Spark Plug Replacement:
Inspect every 2,000 miles, replace as needed (typically around 10,000-15,000 miles).
Brake Fluid Flush:
Every 2 years or as recommended by manual, especially if disc brakes are fitted.
Drive Belt Tension:
Guidance on checking and adjusting drive belt tension (if belt drive is present on specific FX models, FL typically had chain).
Engine Oil Viscosity:
SAE 20W-50 or SAE 50 (refer to manual for specific Harley-Davidson recommendations like HD 360)
Transmission Fluid Type:
SAE 75W-90 gear oil or HD transmission oil.
Primary Chain Case Oil:
Harley-Davidson Primary Chain Lubricant or equivalent SAE 20W-50 motorcycle oil.
Brake Fluid Type:
DOT 3 or DOT 4, depending on the brake system configuration (check specific manual and caliper manufacturer recommendations).
Known Issues:
Shovelhead engine oil leaks, valve guide wear, camshaft bushing wear, electrical system gremlins (especially wiring insulation breakdown), carburetor flooding or starvation, transmission shifting issues, starter clutch problems, leaky primary cover gaskets, exhaust pipe leaks.
Typical Repairs:
Engine top-end rebuilds, primary drive rebuilds, carburetor tuning, electrical harness repair, transmission main shaft seal replacement, brake caliper rebuilding.
Brand Heritage:
Harley-Davidson, founded in 1903, has a long-standing reputation for building iconic American V-twin motorcycles, known for their durability, customization potential, and distinctive sound.
Model Evolution:
The Electra Glide, introduced in 1965, was Harley-Davidson's first large touring motorcycle. The 'Super Glide' designation, often applied to the FX chassis, offered a sportier alternative. The early 1970s models represent a transition period, continuing the legacy of the Shovelhead engine and evolving styling.
Chassis Evolution:
Distinction between FL (Electra Glide - cradle frame, heavier) and FX (Super Glide - often with a frame similar to Sportster, lighter) chassis types and their impact on handling and design.
Production Era:
The FL chassis (Electra Glide) and FX chassis (Super Glide) were integral to Harley-Davidson's lineup during this period, representing the core of their large displacement motorcycle offerings.
Recognitions:
The Shovelhead era Harley-Davidsons are highly regarded among collectors and enthusiasts for their raw character and contribution to motorcycle culture. They are often featured in vintage motorcycle shows and magazines.
Ratings:
High owner satisfaction ratings for classic bike enthusiasts, particularly for their mechanical simplicity and sound.
Certifications:
N/A (Vintage motorcycles are not subject to modern regulatory certifications in the same way).
