Positioning:
Iconic cruiser renowned for its distinctive styling and powerful V-twin engine
Segment:
Cruiser motorcycle segment
Key Competitors:
Indian Chief, Victory Kingpin
Styling:
Wide front tire, chrome accents, whitewall tires, teardrop fuel tank
Powertrain:
Torque-rich V-twin engine designed for cruising performance
Ride Experience:
Comfortable riding position, smooth power delivery
Engine System:
Engine assembly, disassembly, diagnosis, tuning, and repair
Fuel System:
Fuel injection (EFI), fuel pump, fuel filter, throttle body, sensors
Ignition System:
Ignition coils, spark plugs, timing, crank position sensor
Transmission System:
Clutch, primary drive, gearbox, final drive belt
Electrical System:
Wiring diagrams, battery, charging system, starting system, lighting, instrumentation, security system
Chassis System:
Frame, front forks, rear suspension, wheels, tires, steering, brakes
Bodywork And Trim:
Fenders, fuel tank, seat, handlebars, mirrors, lighting assemblies
Diagnostics And Troubleshooting:
Diagnostic trouble codes (DTCs), symptom-based troubleshooting guides
Maintenance Procedures:
Oil changes, filter replacements, spark plug replacement, brake fluid flush, belt inspection/tensioning
Repair Procedures:
Engine rebuild, transmission overhaul, brake caliper replacement, suspension component service
Diagnostic Procedures:
Testing ignition components, checking fuel pressure, diagnosing electrical faults
Installation Procedures:
Component replacement, accessory installation guidance
Depth Of Coverage:
Comprehensive, from routine maintenance to full mechanical and electrical rebuilds
Diagnostic Capabilities:
Detailed diagnostic procedures and fault code interpretation
Precision Specifications:
Includes torque specifications, clearances, and measurements for all components
Engine Type:
Air-cooled, Twin Cam 103B V-twin
Displacement:
1690 cc (103 cubic inches)
Bore X Stroke:
3.875 in. x 4.496 in. (98.4 mm x 114.2 mm)
Peak Torque:
101 ft-lbs @ 3500 RPM (137 Nm @ 3500 RPM)
Horsepower:
Approximately 75 HP (specifications can vary slightly)
Fuel Delivery:
Electronic Sequential Port Fuel Injection (ESPFI)
Fuel Type:
Premium Unleaded Gasoline
Cooling Method:
Air-cooled
Length:
94.5 in. (2400 mm)
Wheelbase:
64.5 in. (1638 mm)
Seat Height Laden:
26.2 in. (665 mm)
Ground Clearance:
4.8 in. (122 mm)
Dry Weight:
697 lbs (316 kg)
Gross Vehicle Weight Rating:
N/A (Typical for motorcycles to have GVWR, but not always explicitly stated in this format)
Curb Weight:
738 lbs (335 kg)
Fuel Tank Capacity:
5.0 gal (18.9 L)
Front Tire:
130/90B16 73H
Front Wheel:
16-inch Chrome Aluminum Billet-style
Rear Wheel:
16-inch Chrome Aluminum Billet-style
Crash Test Ratings:
N/A (Motorcycles are not typically rated by agencies like NHTSA in the same way as cars)
Braking System:
Hydraulic disc brakes, front and rear
ABS:
Optional (Anti-lock Braking System)
Lighting:
Halogen headlight, LED taillight, turn signals
Security:
Factory-installed anti-theft system (H-D Smart Security System) with key fob
Audio System:
Optional AM/FM radio with CD player and CB/Intercom capability, dependent on specific model configuration or accessory packages.
Display:
Analog speedometer with integrated digital readouts (odometer, trip meter, gear indicator, fuel gauge, etc.)
Cruise Control:
Standard on many FLSTF models, providing a more relaxed touring experience.
Data Ports:
Diagnostic port for engine management system (ECM) communication, typically accessed with specialized diagnostic tools like Harley-Davidson's Digital Technician.
First Service:
1,000 miles (1,600 km) or 6 months
Subsequent Service:
Every 5,000 miles (8,000 km) or 12 months, whichever comes first
Engine Oil Type:
Harley-Davidson SYN3 (Synthetic) SAE 20W-50, or equivalent API CI-4 or CG-4 certified V-Twin specific oil
Engine Oil Capacity:
3.5 US qt (3.3 L) with filter change
Transmission Fluid Type:
Harley-Davidson Formula + (or equivalent GL-4 SAE 80W-90)
Transmission Fluid Capacity:
1.0 US qt (0.95 L)
Primary Chain Case Fluid Type:
Harley-Davidson Formula + (or equivalent GL-4 SAE 80W-90)
Primary Chain Case Fluid Capacity:
1.0 US qt (0.95 L)
Fork Oil Type:
Refer to manual for specific weight, often Harley-Davidson Spectro Big Twin Fork Oil or equivalent
Fork Oil Capacity:
Refer to manual, typically around 9.5-10.0 fl oz per fork leg
Cam Chain Tensioner Wear:
Early Twin Cam engines (pre-2007) had issues with cam chain tensioner wear. 2013 models utilize a hydraulic tensioner system which is generally more robust, but inspection is still recommended.
Stalling:
Can sometimes be related to fuel system issues (e.g., dirty injectors, faulty sensors) or electrical gremlins.
Oil Leaks:
Common areas to check for leaks include primary cover, transmission, and engine base gasket.
Idle Roughness:
Can be caused by carbon buildup, faulty spark plugs, or vacuum leaks.
Filter Oil Part Number:
Harley-Davidson 63796-77A (or equivalent, e.g., Harley-Davidson 63731-98C for some models)
Spark Plug Type:
Harley-Davidson 32303-07 (or equivalent NGK DCPR7E)
Brand Philosophy:
American motorcycle manufacturing, customization, freedom
Model Introduction:
The Fat Boy concept originated in the early 1990s, with the FLSTF model being formally introduced.
Key Design Elements:
Heavily influenced by classic styling cues, with a distinctive wide front tire and fluted fenders.
Engine Progression:
Evolution from Evolution engine to Twin Cam, culminating in the Twin Cam 103 for this generation.
Manufacturing Location:
United States (Various Harley-Davidson facilities)
Production Years For Tc103:
The Twin Cam 103 became standard on many Softail models, including the Fat Boy, around 2012-2013.