2011 Harley-Davidson FLSTF Fat Boy Technical Analysis & Specification Breakdown
Positioned in Harley-Davidson's custom - cruiser motorcycle lineup, the 2011 Harley-Davidson FLSTF Fat Boy relies on a 1584 cc (96.7 cu in) air-cooled v2, four-stroke powerplant. In factory specification, maximum torque reaches 127 Nm (93.7 lb-ft) at 3,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 95.3 x 111.1 mm (3.8 x 4.4 inches) with a 9.2:1 compression ratio.
On the scales, the FLSTF Fat Boy measures 314.8 kg (694 lbs) dry. Rider ergonomics and chassis geometry center around a 699 mm (27.5 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,638 mm (64.5 in) wheelbase engineered for planted straight-line stability. The 19.7-liter (5.2 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Within MotoLibrary's Harley-Davidson archive, this model family spans 7 indexed model years from 1999 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
699 mm (27.5 in)
Engine
Displacement1584.0 ccm (96.66 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsTwin Cam 96B
Torque127.0 Nm (12.9 kgf-m or 93.7 ft.lbs) @ 3000 RPM
Compression9.2:1
Bore x Stroke95.3 x 111.1 mm (3.8 x 4.4 inches)
Valves/Cylinder2
Fuel SystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
LubricationPressurized, dry-sump
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
Clutch9-plate, wet
DrivelinePrimary Drive: Chain, 34/46 ratio. Final Drive: Belt, 32/66 ratio
Performance
ExhaustChrome, over/under shotgun exhaust with dual mufflers
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
