Positioning:
The 1972 Super Glide FX was a significant model for Harley-Davidson, marking a departure from previous styling with its integrated fiberglass 'boat tail' rear fender and side covers, and a new frame design for the FX frame.
Competitors Era:
Competed against other American V-twins and emerging Japanese motorcycles, aiming for a performance-oriented rider.
Design:
Iconic 'boat tail' styling, low-slung profile, 4-speed transmission, and the powerful Shovelhead engine.
Target Audience:
Mechanics, experienced DIY enthusiasts, and owners seeking in-depth knowledge for restoration and maintenance.
Engine:
Disassembly, assembly, inspection, tuning, troubleshooting of the Shovelhead engine.
Transmission:
Service and repair of the 4-speed constant mesh transmission.
Electrical System:
Wiring diagrams, component testing, troubleshooting, lighting, ignition systems.
Fuel System:
Carburetor (likely Linkert or early Keihin) service, tuning, and troubleshooting.
Brakes:
Front and rear brake system maintenance, adjustments, and component replacement.
Suspension:
Front fork (leading axle) and rear shock absorber service and adjustments.
Frame And Body:
Frame inspection, bodywork adjustments, component mounting.
Maintenance:
Routine maintenance tasks, lubrication schedules, fluid changes.
Repair:
Step-by-step repair procedures for all major vehicle components.
Disassembly Assembly:
Detailed instructions for taking apart and reassembling major sub-assemblies.
Troubleshooting:
Diagnostic flowcharts and common problem solutions.
Adjustments:
Precise instructions for adjusting engine timing, carburetor, brakes, etc.
Depth:
Comprehensive, covering everything from basic checks to full engine and transmission rebuilds.
Engine Type:
Air-cooled, 45-degree V-twin
Engine Displacement Ci:
74 cubic inches (1200cc)
Engine Family:
Shovelhead
Bore X Stroke Inches:
3.4375 in. x 4.00 in.
Compression Ratio:
8.0:1 (typical)
Horsepower Approx:
60+ HP (estimated)
Torque Approx:
70+ ft-lbs (estimated)
Carburetor Type:
Likely Linkert M74 or early Keihin Butterfly
Fuel Requirement:
Leaded gasoline, Octane rating 90+ (approx)
Ignition Type:
Contact point ignition with magneto or battery coil system.
Safety Standards:
N/A (Motorcycles of this era did not have standardized crash ratings).
Braking System:
Front: Hydraulic disc brake; Rear: Drum brake.
Lighting:
Headlight, taillight, brake light, turn signals, and indicators.
Oil Change Miles:
Every 2,000-3,000 miles (1972 specification)
Primary Chain Tension Check:
Every 1,000-2,000 miles
Spark Plug Replacement:
Every 5,000-7,500 miles (or as needed)
Carburetor Adjustment:
As needed, often at oil change intervals
Engine Oil Type:
Harley-Davidson Motorcycle Oil (or equivalent SAE 20W50 mineral oil, API SG or higher)
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic fluid (for disc brake)
Engine Oil Capacity Qts:
3 quarts (2.8 L) with filter change
Shifter Lever Play:
Wear in the shifter pawl and return spring can cause sloppy shifting.
Oil Leaks:
Common in Shovelheads, often from pushrod tubes, crankcase seals, and rocker boxes.
Electrical Connectors:
Corrosion and loose connections can lead to intermittent electrical faults.
Carburetor Tuning:
Linkert carburetors can be finicky and require frequent adjustment for optimal performance.
Founding:
Harley-Davidson Motor Company founded in 1903.
Fx Series Introduction:
The FX frame was introduced in 1971, offering a stiffer and more modern chassis compared to the FL frame.
Super Glide Fx Introduction:
The Super Glide FX debuted in 1971, designed by Willie G. Davidson to appeal to a younger, sportier rider.
Boat Tail Era:
The 'boat tail' fiberglass bodywork was a distinctive feature for 1971-1972 models, later replaced by the 'manta ray' tail section.
Manufacturing Location:
Milwaukee, Wisconsin, USA
