Positioning:
The Harley-Davidson FLSTF Fat Boy is an iconic cruiser known for its distinctive styling and V-twin performance, appealing to riders seeking classic American motorcycle aesthetics and a relaxed riding experience.
Competitors:
Competes with other large-displacement cruisers from manufacturers like Indian Motorcycles, Victory Motorcycles (though discontinued), and select models from Japanese brands in the cruiser segment.
Styling:
Fat tires, solid disc wheels, chrome accents, teardrop fuel tank.
Engine:
Torque-rich V-twin engine providing characteristic Harley-Davidson power delivery.
Ergonomics:
Low seat height and comfortable riding position for cruising.
Engine:
V-Twin engine, internal components, tuning, diagnostics
Transmission:
Clutch, gearbox, primary drive, final drive
Fuel System:
Fuel injection (EFI), throttle body, fuel pump, lines, emissions
Electrical System:
Ignition, lighting, charging system, starter, battery, wiring diagrams
Brakes:
Hydraulic systems, calipers, master cylinders, rotors, pads, bleeding procedures
Suspension:
Front forks, rear shock absorbers, adjustment, seals, fluid replacement
Frame And Bodywork:
Frame components, fenders, fuel tank, seat, handlebars, controls
Wheels And Tires:
Tire replacement, wheel balancing, bearing maintenance
Cooling System:
Air-cooled engine specifics, airflow management
Maintenance:
Routine checks, fluid changes, filter replacements, lubrication
Troubleshooting:
Diagnostic procedures for common and uncommon issues, fault code interpretation
Repair:
Component disassembly, reassembly, adjustment, and replacement procedures
Diagnostics:
Step-by-step troubleshooting guides, wiring diagrams for fault finding
Engine Rebuild:
Detailed instructions for engine disassembly, inspection, and rebuilding
Transmission Overhaul:
Gearbox and clutch component servicing and repair
Electrical Diagnostics:
Wiring schematic interpretation, troubleshooting electrical faults
Brake System Service:
Brake fluid bleeding, caliper maintenance, master cylinder replacement
Depth:
Comprehensive coverage from basic maintenance to complete engine and transmission rebuilds, including detailed diagnostic procedures and specifications.
Engine Type:
Air-cooled, Twin Cam 96 V-Twin
Displacement:
1584 cc (96 cubic inches)
Bore X Stroke:
3.75 in. x 4.38 in. (95.25 mm x 111.25 mm)
Valvetrain:
Overhead valves (OHV), 4 valves per cylinder (2 intake, 2 exhaust)
Ignition System:
High-performance, two spark plugs per cylinder
Horsepower Est:
Approx. 60-70 HP (specific figures vary by tuning and exhaust)
Torque Est:
Approx. 80-90 ft-lbs @ 3000 RPM (specific figures vary by tuning and exhaust)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Unleaded gasoline, minimum 91 octane (R+M)/2
Oil Capacity:
3.0 US qt. (2.8 L)
Oil Type:
Harley-Davidson 20W-50 Genuine Motorcycle Oil or equivalent SAE 20W-50, API CI-4 rated
Transmission Type:
5-speed constant mesh
Primary Drive:
Duplex chain, 1.211 ratio
Final Drive:
Belt, 32/66 ratio
Clutch:
Hydraulic, multi-plate wet clutch
Transmission Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant
Transmission Oil Capacity:
24 US fl oz (0.7 L)
Safety Certification:
Meets applicable US EPA, CARB, and DOT regulations for the model year.
Braking System:
Hydraulic disc brakes front and rear.
Lighting:
Halogen headlight, LED tail lights and brake lights.
Frame Construction:
Steel frame and swingarm designed for stability.
Infotainment System:
The 2006 Fat Boy typically features a simple analog instrument cluster, not a modern infotainment system. May include an odometer, trip meter, speedometer, and indicator lights.
ABS:
Anti-lock Braking System (ABS) was optional on some 2006 Harley-Davidson models, confirm if equipped.
Connectivity Features:
No integrated smartphone connectivity or Bluetooth features on this model.
First Service:
1,000 miles (1,600 km) or 6 months, whichever comes first.
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months thereafter for routine checks and fluid changes. Specific intervals for brake fluid, spark plugs, and other components detailed in the manual.
Engine Oil:
Harley-Davidson 20W-50 Genuine Motorcycle Oil or equivalent SAE 20W-50, API CI-4 rated.
Transmission Primary Oil:
Harley-Davidson Formula + Transmission & Primary Chaincase Lubricant.
Brake Fluid:
DOT 4 brake fluid.
Fork Oil:
Refer to manual for specific viscosity and type (often 15W).
Common Wear Items:
Clutch plates, brake pads, tires, wheel bearings are common wear items. Refer to manual for specific inspection points.
Potential Issues 2006:
While generally robust, some Twin Cam 96 engines from this era could experience cam chain tensioner wear. Manual would detail inspection and replacement.
Spark Plugs:
Replacement interval typically every 10,000-15,000 miles. Manual will specify exact type (e.g., Harley-Davidson SE SP-45).
Air Filter:
Inspect at every service, replace as needed. Part number often H-D 29290-01B or equivalent.
Heritage:
Harley-Davidson is an American manufacturer with a long and storied history dating back to 1903, synonymous with American motorcycle culture and freedom.
Fat Boy Origin:
The Fat Boy model was introduced in 1990, inspired by custom bikes of the 1950s, and quickly became a popular model due to its distinctive 'fat' styling.
Production Location:
Manufactured in the United States.
Model Year Significance:
The 2006 model year features the Twin Cam 96 engine, a significant upgrade in displacement and performance from earlier models.
