Iconic Status:
The Harley-Davidson Fat Boy is an iconic cruiser, renowned for its distinctive styling and powerful V-twin engine.
Segment:
Cruiser motorcycle segment.
Styling:
Wide front fork, fluted tank, chrome accents, whitewall tires (on many models).
Engine Emphasis:
Emphasis on torque and rider experience, characteristic Harley-Davidson V-twin sound and feel.
Comprehensive Support:
Provides owners and technicians with the necessary information for maintenance, repair, and diagnostics, ensuring the longevity and performance of the motorcycle.
Engine Mechanical:
Engine overhaul, disassembly, assembly, internal components, lubrication, cooling.
Fuel System:
Carburetor (for FLSTF) and Fuel Injection (EFI for FLSTFI) systems, fuel pump, fuel lines, fuel tank.
Ignition System:
Ignition timing, spark plugs, coils, ignition module, wiring.
Transmission Drivetrain:
Clutch, gearbox, primary drive, final drive, belt drive, maintenance, repair.
Electrical System:
Battery, charging system (stator, regulator/rectifier), starter, lighting, indicators, gauges, wiring diagrams, fuses, relays.
Chassis Frame:
Frame inspection, repair, headstock bearings.
Suspension:
Front fork (telescopic), rear shock absorbers, bushings, seals, adjustment.
Brakes:
Front and rear disc brakes, calipers, master cylinders, brake lines, fluid bleeding, maintenance, repair.
Wheels Tires:
Wheel bearings, spoke tension, tire selection, mounting, balancing.
Bodywork Fenders:
Fender removal/installation, tank, side covers, seat, handlebar assembly, controls.
Diagnostics:
Troubleshooting guides, fault finding procedures, diagnostic trouble codes (DTCs) for FLSTFI.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment (if applicable, though Fat Boys typically use belt drive), lubrication points.
Scheduled Maintenance:
Detailed service intervals and tasks for various mileage/time periods.
Component Overhaul:
Engine rebuild, transmission rebuild, suspension fork rebuild, brake caliper overhaul.
Troubleshooting:
Step-by-step guides for diagnosing and resolving common and uncommon problems.
Wiring Diagrams:
Comprehensive electrical schematics for all systems.
Special Tool Requirements:
Identification and usage of specialized tools required for specific repair procedures.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds. Detailed diagnostic procedures for fuel-injected models.
Engine Family:
Harley-Davidson Twin Cam 88 (or similar evolution for the period)
Engine Configuration:
45-degree V-twin, air-cooled
Displacement:
1450cc (88 cubic inches)
Horsepower Estimate:
Approximately 65-70 HP (varies by tuning and year)
Torque Estimate:
Approximately 80-85 ft-lbs (varies by tuning and year)
Carbureted Model:
FLSTF typically used Keihin CV carburetor
Fuel Injected Model:
FLSTFI used Electronic Fuel Injection (EFI) system
Bore X Stroke:
3.75 in x 4.00 in (95.25 mm x 101.6 mm)
Compression Ratio:
9.2:1 (typical)
First Service:
Typically at 1,000 miles (1600 km): oil change, primary fluid change, inspection of all systems.
Subsequent Services:
Every 5,000 miles (8,000 km) or annually: includes engine oil and filter change, inspection of brakes, tires, drive belt, and electrical components.
Engine Oil:
Harley-Davidson SYN3 Full Synthetic Motorcycle Oil or equivalent API CI-4 rated, SAE 20W-50.
Primary Chain Case Oil:
Harley-Davidson Formula+ Transmission & Primary Chain Case Lubricant or SAE 50 gear oil.
Transmission Oil:
Harley-Davidson Formula+ Transmission Lubricant or SAE 75W-90 synthetic gear oil.
Brake Fluid:
DOT 4 brake fluid.
Cam Chain Tensioners:
Early Twin Cam models (pre-2007) can experience wear on the cam chain tensioners, requiring inspection and potential replacement with upgraded hydraulic tensioners.
Crankshaft Position Sensor:
Potential for failure leading to starting or running issues.
Regulator Rectifier:
Can be a failure point, impacting battery charging.
O-Ring Leaks:
Leaking o-rings in the primary drive or engine can occur over time.
Founding:
Founded in 1903 in Milwaukee, Wisconsin, USA.
Legacy:
Pioneer in motorcycle manufacturing, known for its V-twin engines and cruiser motorcycles.
Fat Boy Introduction:
The Fat Boy nameplate was first introduced in 1990, quickly becoming one of Harley-Davidson's most recognizable models.
Twin Cam Era:
The 2000-2005 models fall into the era of the Twin Cam engine, a significant technological advancement for Harley-Davidson.
Manufacturing Location:
Milwaukee, Wisconsin, USA (and potentially other Harley-Davidson assembly plants).
