Harley-Davidson FLSTFI Fat Boy - 2003 Specifications and Reviews

The 2003 Harley-Davidson FLSTFI Fat Boy is an iconic cruiser that appeals to riders seeking classic style and commanding presence. Powered by a 1449cc V-twin engine with fuel injection, it delivers 105 lb-ft of torque for relaxed highway cruising. Known for its distinctive fat tires and timeless design, the Fat Boy remains one of Harley's most recognizable and sought-after models.

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General information

CategoryCustom / cruiser
Year2003
ModelHarley-Davidson FLSTFI Fat Boy
 
 

Engine and Transmission Specifications

Transmission typefinal driveBelt
Cooling systemAir
Fuel systemInjection
Bore x stroke95.3 x 101.6 mm (3.8 x 4.0 inches)
Compression8.8:1
Torque105.00
Stroke4
Engine typeV2
Capacity:1449.00 ccm (88.42 cubic inches)

Physical measures and capacities

Wheelbase1,630 mm (64.2 inches)
Ground clearance123 mm (4.8 inches)
Overall length2,396 mm (94.3 inches)
Seat height699 mm (27.5 inches) If adjustable, lowest setting.
Dry weight320.0 kg (705.5 pounds)

Harley-Davidson FLSTFI Fat Boy dimensions and frame

Color options2-tone sterling silver & vivid black, vivid black, gunmetal pearl, luxury rich red pearl, white pearl, luxury blue pearl
Fuel capacity19.70 litres (5.20 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

5.5s
0-60 mph (est.)

Best For

Track10%
City45%
Cornering30%
Daily Riding55%
Touring55%
Passenger55%

Rider Profile

Best ForBest suited to riders who already have some experience handling a heavy, low-slung cruiser at low speeds.
PurposeBuilt for laid-back boulevard cruising and iconic Fat Boy style rather than outright performance.
Rider FitIts substantial weight and long wheelbase demand confident strength and balance during slow-speed maneuvers like parking and U-turns.
CharacterA torque-rich, thumping V-twin cruiser that rewards relaxed, unhurried riding over twisty back roads.
Not Ideal ForNot a good fit for riders seeking sharp cornering agility, off-road capability, or high-speed sport performance.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2003 Harley-Davidson FLSTFI Fat Boy Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 699mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2003 Harley-Davidson FLSTFI Fat Boy, with a cramped knee angle of around 75 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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⚠ Safety Recalls (1)

EQUIPMENT:OTHER:LABELS Apr 2005 · 05V151000

CERTAIN SOFTAIL MOTORCYCLES FAIL TO COMPLY WITH THE REQUIREMENTS OF PART 567, 'CERTIFICATION.' THE VIN/CERTIFICATION LABEL CONTAINS INCORRECT TIRE SIZE AND INFLATION PRESSURES FOR THE FRONT WHEEL. THE LABEL STATES THE TIRE SIZE IS MT90B21 AND THE INFLATION PRESSURE AS 30 PSI, WHEREAS THE CORRECT TIRE SIZE IS MT90B16, AND THE CORRECT INFLATION PRESSURE IS 36 PSI.

Risk: THE CERTIFICATION LABEL IS INCORRECT GIVING IMPROPER INFORMATION.

Remedy: HARLEY- DAVIDSON WILL MAIL INSTRUCTIONS ALONG WITH CORRECTED FEDERAL CERTIFICATION LABEL. IF AN OWNER SO DESIRES, A DEALER CAN INSTALL THE LABEL FOR THEM. THE RECALL BEGAN ON JUNE 6, 2005. OWNERS MAY CONTACT HARLEY-DAVIDSON AT 1-414-343-4056.

Source: NHTSA. View all Harley-Davidson recalls →

Rider Reviews

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