Cruisers

2008Harley-Davidson FLSTF Fat Boy

26 fields on record

The 2008 Harley-Davidson FLSTF Fat Boy is the iconic Softail with solid disc wheels and wide tyres. Its air-cooled 1584cc Twin Cam 96B makes 67 hp and 115.3 Nm through a six-speed gearbox and belt drive. A 323.9 kg wet weight and 18.9-litre tank give it a heavy, solid presence.

Capacity: 1584.0 ccm
Engine: V-Twin, four-stroke
Gearbox: 6-speed
Dry weight: 309.8 kg
Seat height: Not on record
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Power: 67.0 HP (49.3 kW)

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What’s new for the 2008 Harley-Davidson FLSTF Fat Boy

vs the 2007

Spec	2007	2008
Engine capacity	1442.2 ccm (88.01 cubic inches)	1584.0 ccm (96.66 cubic inches)
Gearbox	5-speed	6-speed

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.

Full specifications

Engine

Capacity: 1584.0 ccm
Power: 67.0 HP (49.3 kW)
Torque: 115.3 Nm (11.8 kgf-m)
Engine type: V-Twin, four-stroke
Power/weight ratio: 0.2163 HP/kg (dry)
Bore x stroke: 95.3 x 101.6 mm
Compression: 8.9:1
Cooling system: Air
Fuel system: Carburettor
Starting: Electric

Transmission

Gearbox: 6-speed
Transmission type: Manual
Final drive: Belt
Clutch: Multi-plate with diaphragm spring in oil bath

Dimensions & weight

Wheelbase: 1638 mm
Overall length: 2395 mm
Dry weight: 309.8 kg
Wet weight: 323.9 kg
Fuel capacity: 18.90 litres
Ground clearance: 130 mm
Seat height: Not on record - add it

Brakes & wheels

Front brakes: Single disc
Rear brakes: Single disc
Front tyre: MT90-B16
Rear tyre: 150/80-B16

Other

Color options: Vivid black, brilliant silver, black pearl, deep cobalt, glacier white pearl, yellow pearl, brandy wine sunglo, two-tone chopper blue and brilliant silver, two-tone black cherry and black pearl, two-tone fire red pearl and vivid black, two-tone deep cobal

Specs last verified against published sources: October 2026.

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