Positioning:
The definitive guide for owners and technicians working on the iconic 1966 Harley-Davidson Electra Glide FL, a benchmark in American touring motorcycles.
Comparative Value:
Essential for preserving the originality and functionality of a vintage motorcycle, offering detailed factory procedures not readily available elsewhere for this specific model year.
Features:
Detailed schematics, step-by-step repair instructions, torque specifications, and troubleshooting guides for all major motorcycle systems.
Engine:
Shovelhead OHV V-Twin, carburetor systems (e.g., Linkert), ignition systems, lubrication, cooling (air-cooled)
Transmission:
4-speed constant mesh, clutch operation and adjustment, primary drive system
Chassis And Suspension:
Frame, front fork (leading link or telescopic depending on specific FL designation), rear shock absorbers, wheels, bearings
Brakes:
Drum brake systems (front and rear), hydraulic and mechanical linkages
Electrical System:
Wiring diagrams, battery, generator, lighting, starter motor, horn, instrumentation
Fuel System:
Fuel tank, fuel lines, fuel petcock, carburetor maintenance and tuning
Bodywork And Trim:
Fenders, fuel tank, seat, fairing (if applicable for Electra Glide), saddlebags
Maintenance:
Routine checks, lubrication points, filter replacements, spark plug service, brake adjustments
Troubleshooting:
Diagnostic procedures for common starting, running, and electrical issues
Repair:
Component disassembly, reassembly, and repair for all major systems
Overhaul:
Detailed instructions for engine and transmission rebuilds
Electrical Diagnostics:
Troubleshooting electrical faults using wiring diagrams and component testing
Depth:
Comprehensive, from basic adjustments to complete engine and transmission overhauls
Engine Type:
Air-cooled, 45-degree V-twin, OHV (Overhead Valve)
Engine Designation:
Shovelhead
Bore X Stroke:
3.4375 in x 4.25 in (87.3 mm x 108.0 mm)
Displacement:
74 cu in (1213 cc)
Horsepower Estimate:
Approximately 55-60 hp (at crank, estimated for era)
Torque Estimate:
Approximately 70-75 lb-ft (at crank, estimated for era)
Carburetor:
Linkert M-Series (e.g., M74B)
Fuel Type:
Unleaded gasoline (appropriate octane for vintage engines)
Oil System:
Total loss oiling system with oil tank and pump
Oil Type Specification:
SAE 50 motorcycle oil (specific grades as per manual)
Ignition System:
Battery and coil, magneto (depending on variant), breaker points and condenser
Type:
4-speed constant mesh, foot shift with clutch pedal
Transmission Options:
N/A for this specific model year FL designation
Clutch Type:
Wet multi-plate, diaphragm spring
Primary Drive:
Chain drive within a sealed primary case
Transmission Oil Specification:
SAE 50 or 60 motorcycle gear oil (specific grades as per manual)
Wheelbase:
Approximately 60-62 inches (varies slightly)
Seat Height:
Approximately 28-30 inches (laden, estimated)
Dry Weight:
Approximately 700-750 lbs (varies by equipment)
Gross Vehicle Weight Rating:
Not explicitly stated in the same way as modern vehicles, but designed for rider + passenger + luggage.
Infotainment System:
Basic analog instrumentation (speedometer, ammeter, oil pressure gauge).
Driver Assistance Features:
N/A (No electronic driver assistance systems).
Connectivity Features:
N/A (No modern connectivity features).
Oil Change Interval:
Typically every 1,000-2,000 miles or annually, depending on usage (as per manual guidance).
Tune Up Interval:
Regular checks of ignition timing, carburetor settings, and valve lash every 3,000-5,000 miles.
Chain Adjustment:
Primary chain and final drive chain lubrication and adjustment as needed, generally every 1,000-2,000 miles.
Engine Oil:
SAE 50 Motorcycle Oil (e.g., HD-1024, or equivalent)
Transmission Oil:
SAE 50 or SAE 60 Motorcycle Gear Oil (e.g., HD-8830, or equivalent)
Primary Chain Lubricant:
Motorcycle transmission oil or specific primary lubricant (e.g., HD-8830)
Brake Fluid:
DOT 3 or DOT 4 hydraulic fluid for drum brake systems (check manual for exact type)
Common Wear Items:
Pushrod tube seals, valve guides, carburetor wear (Linkert), generator brushes, clutch plates, wheel bearings, fuel tank rust (if not properly maintained).
Electrical Common Faults:
Intermittent charging due to generator wear, worn wiring insulation, faulty ignition switch.
Engine Common Faults:
Oil leaks, lifter noise, carburetor flooding/leaking, timing issues.
Heritage:
Harley-Davidson, founded in 1903, is synonymous with American motorcycle culture, known for its V-twin engines and touring capabilities.
Model Lineage:
The Electra Glide, introduced in 1965, represented Harley-Davidson's first full-dress touring motorcycle, featuring an electric starter and fairing, evolving from the FL Hydra-Glide and FL Duo-Glide.
Engine Introduction:
The Shovelhead engine, characterized by its distinctive rocker box covers resembling shovels, was introduced in 1966, replacing the Panhead engine and powering models like the Electra Glide.
Production Period:
The Shovelhead engine was produced from 1966 to 1984. The Electra Glide model has continued in various forms to the present day.
Manufacturing Location:
Milwaukee, Wisconsin, USA
Vintage Status:
Iconic status in motorcycle history, highly collectible and sought after by enthusiasts.
Owner Satisfaction:
Generally high among dedicated owners for its classic styling, sound, and riding experience, though requiring dedicated maintenance.
Historical Significance:
Represents a significant step in motorcycle touring technology for its era.
