Positioning:
The 1972 Electra Glide FLH was the pinnacle of American touring motorcycles, designed for comfort and long-distance travel, appealing to riders seeking a robust and classic V-twin experience.
Competition:
Competed primarily with other large-displacement V-twin motorcycles and some British touring models. Its unique styling, V-twin rumble, and extensive touring features set it apart.
Features:
Large displacement V-twin engine, comfortable riding position, extensive fairing and saddlebag options for luggage capacity, reliable for its era.
Purpose:
To provide owners and technicians with the definitive guide for maintaining, troubleshooting, and repairing the 1972 Harley-Davidson Electra Glide FLH.
Engine Mechanical:
Full disassembly, inspection, and reassembly of all engine components, including cylinders, pistons, connecting rods, crankshaft, camshaft, valves, and timing.
Engine Fuel System:
Carburetor (likely Linkert or S&S Super E/G) disassembly, cleaning, adjustment, and troubleshooting. Fuel tank, lines, and petcock maintenance.
Engine Ignition System:
Points ignition system maintenance, timing, coil testing, spark plug specifications, and troubleshooting.
Engine Lubrication System:
Oil pump operation, oil filter replacement, oil change intervals, and troubleshooting lubrication issues.
Transmission:
4-speed manual transmission service, including clutch operation, gear selection, bearing inspection, seal replacement, and fluid specifications.
Drive Train:
Primary drive chain inspection and adjustment, final drive chain maintenance and lubrication.
Brakes:
Front and rear brake system service, including drum brake shoe replacement, brake pedal adjustment, and hydraulic component checks (if applicable, though likely mechanical drum brakes for '72 FLH).
Suspension:
Front fork (likely Showa or Marzocchi style) disassembly, seal replacement, fluid type and level specifications, rear shock absorber service.
Electrical System:
Wiring diagrams, component testing (generator/alternator, battery, starter, lights, horn), troubleshooting electrical faults, and fuse/circuit breaker information.
Frame And Bodywork:
Frame inspection, body panel removal and installation, fairing (if equipped) service, fender adjustments, and seat mounting.
Wheels And Tires:
Wheel bearing service, tire pressure recommendations, and spoke tensioning (if applicable).
Maintenance:
Scheduled maintenance intervals for oil changes, filter replacements, chain lubrication, ignition timing checks, and brake adjustments.
Troubleshooting:
Detailed diagnostic procedures for common performance issues, starting problems, electrical faults, and mechanical noises.
Repair:
Step-by-step instructions for component repair and replacement, including engine overhauls, transmission rebuilds, and electrical system fixes.
Adjustments:
Carburetor tuning, ignition timing adjustment, clutch and brake lever adjustments, and cable slack adjustments.
Specifications Data:
Torque specifications for all fasteners, engine clearances, ignition timing points, and fluid capacities.
Depth:
Comprehensive, from basic rider maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures.
Engine Type:
Air-cooled, OHV (Overhead Valve) V-twin
Displacement:
73.7 cubic inches (1207cc)
Bore X Stroke:
3.4375 in x 4.25 in (87.3 mm x 108 mm)
Compression Ratio:
Approximately 7.0:1
Horsepower:
Approximately 65 hp (at 5000 rpm, estimated)
Torque:
Approximately 70 ft-lbs (at 3500 rpm, estimated)
Carburetor:
Linkert M-Series or S&S Super E/G (depending on original configuration and dealer modifications).
Fuel Type:
Unleaded gasoline (higher octane recommended for optimal performance and engine longevity)
Oil Type:
Harley-Davidson approved motorcycle oil (e.g., straight weight 50W or a blend suitable for air-cooled V-twins).
Oil Capacity:
Approximately 4 quarts (3.8 liters) including filter.
Oil Change Interval:
Every 2,000-3,000 miles (3,200-4,800 km) or annually, whichever comes first.
Primary Chain Adjustment:
Every 1,000-2,000 miles (1,600-3,200 km).
Ignition Timing Check:
Every 2,000-4,000 miles (3,200-6,400 km).
Fork Oil:
SAE 10W or 15W fork oil (specific type and quantity detailed in manual).
Brake Fluid:
Not applicable for mechanical drum brakes; focus on brake shoe condition and adjustment.
Transmission Fluid Capacity:
Approximately 1 pint (0.47 liters).
Common Wear Items:
Cam followers, lifters, piston rings, valve guides, clutch plates, and ignition points can wear over time and require periodic inspection and replacement.
Potential Faults:
Carburetor flooding or leaks, inconsistent idling, oil leaks from engine seals, and electrical system component failure (generator, voltage regulator).
Tune Up:
Includes spark plug replacement, ignition timing adjustment, carburetor adjustment, and checking all fluid levels.
Heritage:
Harley-Davidson, founded in 1903, has a long-standing legacy of producing iconic V-twin motorcycles known for their durability, sound, and distinctive American character.
Evolution:
The Electra Glide, introduced in 1965, evolved from the Hydra-Glide and Duo-Glide models, becoming Harley-Davidson's flagship touring machine. The 1972 model represents a significant step in its development, featuring the larger Shovelhead engine and refined styling.
Production Era:
The Shovelhead engine was produced from 1966 to 1984. The FLH Electra Glide was a staple of the Harley-Davidson lineup throughout this period and beyond.
Significance:
The 1972 FLH is a highly sought-after classic motorcycle, representing a period when Harley-Davidson was solidifying its identity against increasing Japanese competition.
