2003Harley-Davidson FLSTF Fat Boy

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The 2003 Harley-Davidson FLSTF Fat Boy is a heavyweight cruiser ideal for riders seeking classic American styling and commanding presence. Known for its distinctive fat tires, low-slung chassis, and iconic design, it delivers robust V-Twin power with substantial torque. This custom cruiser appeals to experienced riders who prioritize image and heritage over agility.

Capacity: 1449.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 5-speed
Dry weight: 320.0 kg
Seat height: 699 mm
Power: 67.0 HP (49.3 kW)

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What’s new for the 2003 Harley-Davidson FLSTF Fat Boy

vs the 2002

Spec	2002	2003
Seat height	—	699 mm (27.5 inches)
Fuel capacity	18.90 litres (4.99 US gallons)	19.70 litres (5.20 US gallons)

Other years 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail5%

Cornering30%

City riding45%

Daily riding55%

Touring45%

Two-up55%

Track5%

Best for: Built for stylish boulevard cruising and short-to-medium rides where image and torque-driven presence matter more than outright speed.
Built for: A muscular, classic American cruiser that delivers strong low-end torque and a commanding presence rather than sharp handling or high-rev thrills.
Not ideal for: Not a fit for riders seeking agile cornering, off-road capability, or lightweight everyday maneuverability.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

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Your height

Inseam (optional)

Units

At 699mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with both feet flat on the 2003 Harley-Davidson FLSTF Fat Boy, with a cramped knee angle of around 75 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 750 mm or under — Short Kings →

Find bikes that fit your height →

Full specifications

Engine

Capacity: 1449.0 ccm
Power: 67.0 HP (49.3 kW)
Torque: 106.0 Nm (10.8 kgf-m)
Engine type: V-Twin, four-stroke
Power/weight ratio: 0.2094 HP/kg (dry)
Bore x stroke: 95.3 x 101.6 mm
Compression: 8.8:1
Cooling system: Air
Fuel system: Carburettor
Starting: Electric

Transmission

Gearbox: 5-speed
Transmission type: Manual
Final drive: Belt

Dimensions & weight

Wheelbase: 1630 mm
Overall length: 2396 mm
Seat height: 699 mm
Dry weight: 320.0 kg
Fuel capacity: 19.70 litres
Ground clearance: 123 mm

Brakes & wheels

Front brakes: Single disc
Front brakes diameter: 292 mm
Rear brakes: Single disc
Rear brakes diameter: 292 mm

Other

Color options: 2-tone sterling silver & vivid black, vivid black, gunmetal pearl, luxury rich red pearl, white pearl, luxury blue pearl

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted

Specification	1999	2002	2003	2005	2008	2011
Capacity	1338 cc	1449 cc	1449 cc	1449 cc	1584 cc	1584 cc
Dry weight	—	320 kg	320 kg	320 kg	310 kg	315 kg
Seat height	680 mm	—	699 mm	699 mm	—	699 mm
Fuel capacity	15.9 L	18.9 L	19.7 L	19.7 L	18.9 L	18.9 L