Positioning:
The Harley-Davidson Fat Boy is a flagship cruiser, renowned for its iconic styling, comfortable ride, and powerful V-twin engine, appealing to riders seeking classic American motorcycle aesthetics and performance.
Competitors:
Competes with other large-displacement cruisers from brands like Indian Motorcycle, Victory Motorcycles, and custom builders.
Styling:
Wide front fork, teardrop fuel tank, chromed components, solid-disc wheels, classic Harley-Davidson silhouette.
Engine Type:
Air-cooled Twin Cam 103 V-twin engine.
Purpose:
To provide owners and technicians with the necessary information to maintain, diagnose, and repair the 2012 Harley-Davidson FLSTF Softail Fat Boy effectively and safely.
Primary Coverage:
Maintenance, troubleshooting, diagnostics, repair, and overhaul procedures for the 2012 Harley-Davidson FLSTF Softail Fat Boy.
Estimated Page Count:
Typically 500-800 pages, though exact count may vary by specific manual edition.
Type:
Service Manual / Repair Manual
Engine:
Engine assembly, disassembly, lubrication, cooling, fuel system (EFI), ignition, starting, charging, exhaust.
Transmission:
Clutch, gearbox, primary drive, final drive, lubrication.
Chassis:
Frame, front suspension (forks), rear suspension (shocks), steering, wheels, tires.
Brakes:
Front and rear brake systems, hydraulic components, ABS (if equipped).
Electrical:
Wiring diagrams, lighting, instruments, ignition system, battery, charging system, security system, accessory connections.
Bodywork:
Fenders, fuel tank, seat, handlebars, controls, fairings (if applicable), trim.
Fuel System Details:
Fuel tank removal/installation, fuel pump, fuel filter, injectors, throttle body, idle air control (IAC) system.
Ignition System:
Spark plugs, ignition coils, crank position sensor, ignition module diagnostics.
Charging System:
Stator, voltage regulator/rectifier testing and replacement.
Exhaust System:
Exhaust pipe and muffler removal/installation, gasket replacement, emissions control components.
Maintenance:
Scheduled maintenance intervals, oil changes, filter replacements, lubrication points, inspections.
Repair:
Component-specific repair procedures, detailed disassembly and reassembly instructions, torque specifications.
Troubleshooting:
Diagnostic charts, symptom-based troubleshooting guides, common problem identification and solutions.
Diagnostics:
Detailed diagnostic procedures for engine, electrical, and mechanical systems, including fault code interpretation (if applicable).
Assembly Disassembly:
Step-by-step instructions with clear diagrams for all major component assemblies and disassemblies.
Torque Values:
Comprehensive listing of all critical torque specifications for fasteners and components.
Depth:
Comprehensive, covering routine maintenance to complete engine and transmission overhauls, including electrical system diagnostics and component replacement.
PDF Quality:
High-resolution, optimized for digital viewing and printing. Includes searchable text where available.
Compatibility:
Compatible with Adobe Acrobat Reader and most modern PDF viewers.
Printable:
Yes, pages are designed to be printable for workshop use.
Binding:
Not Applicable (Digital PDF)
Paper Type:
Not Applicable (Digital PDF)
Engine Type:
Air-cooled, Twin Cam 103 V-twin
Displacement:
1690 cc (103 cubic inches)
Bore X Stroke:
3.875 in. x 4.38 in. (98.4 mm x 111.3 mm)
Torque:
Approx. 100 ft-lbs (135 Nm) @ 3500 RPM (subject to specific tuning and emissions compliance)
Horsepower:
Estimated 70-75 HP (subject to specific tuning and emissions compliance)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane (R+M)/2
Initial Service:
1,000 miles (1,600 km) or 6 months, whichever comes first.
Subsequent Oil Change:
Every 5,000 miles (8,000 km) or 12 months, whichever comes first.
Engine Oil:
Harley-Davidson recommends its own SYN3 (20W50) synthetic motorcycle oil, or a premium quality SAE 20W50 motorcycle oil meeting Harley-Davidson specification Harley-Davidson 63782-07A or later. Check manual for specific API service classification.
Primary Chain Case Oil:
Harley-Davidson primary fluid, or a premium quality primary chain case lubricant meeting specification Harley-Davidson 99870-07.
Transmission Oil:
Harley-Davidson transmission fluid, or a premium quality synthetic motorcycle transmission lubricant meeting specification Harley-Davidson 63793-01B or equivalent.
Brake Fluid:
DOT 4 hydraulic brake fluid.
Common Wear Items:
Clutch friction plates, brake pads, wheel bearings, fork seals, drive belt wear.
Potential Problems:
Some Twin Cam models may experience oil pressure issues or cam chain tensioner wear; refer to specific diagnostic procedures in the manual.
Heritage:
Harley-Davidson, founded in 1903, is an iconic American motorcycle manufacturer known for its V-twin engines and distinctive styling.
Fat Boy Origin:
The Fat Boy model debuted in 1990 and quickly became a cultural icon, characterized by its robust styling inspired by custom motorcycles of the 1930s and 1940s.
Production Era:
The FLSTF Softail Fat Boy has been in continuous production, with regular updates to its engine, chassis, and features, including the adoption of the Twin Cam engine platform.
