Harley-Davidson Softail Fat Boy Lo - Specifications & Review

Softail Fat Boy Lo

Article Complete Info

Articleid818369
CategoryCustom-cruiser
MakeHarley-Davidson
ModelSoftail Fat Boy Lo
Year2017

Chassis, Suspension, Brakes & Wheels

FrontbrakesDouble disc. 4-piston. ABS.
FrontsuspensionTelescopic fork
Fronttyre140/75-R17
Rake31.6°
RearbrakesSingle disc. 2-piston. ABS.
RearsuspensionTwin shocks
Reartyre200/55-R17
Trail147 mm (5.8 inches)
WheelsBlack, Bullet Hole Disc Cast Aluminum

Engine & Transmission

Borexstroke98.4 x 111.3 mm (3.9 x 4.4 inches)
ClutchMulti-plate with diaphragm spring in oil bath
Compression9.7:1
CoolingsystemAir
Displacement1687.97 ccm (103.00 cubic inches)
DrivelinePrimary chain, 34/46 ratio
EnginedetailsV2, four-stroke
EnginetypeTwin Cam 103B™
ExhaustsystemDenim Black and Satin Chrome, over/under shotgun exhaust with dual mufflers
Fuelconsumption5.60 litres/100 km (17.9 km/l or 42.00 mpg)
FuelsystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
Gearbox6-speed
Greenhousegases129.9 CO2 g/km. (CO2 - Carbon dioxide emission)
Torque136.00 Nm (13.9 kgf-m or 100.3 ft.lbs) @ 3000 RPM
TransmissiontypefinaldriveBelt

Other Specifications

ColoroptionsCharcoal Denim, Red Iron Denim, Black Denim, Vivid Black, Crushed Ice Denim
CommentsSold in some markets only.
InstrumentsTank-mounted electronic speedometer with odometer, time-of-day clock on odometer, dual tripmeter, RPM/gear display, fuel gauge with low fuel warning light and countdown feature, low oil pressure indicator light, engine diagnostics readout, LED indicator lights, 6-speed indicator light
LightHigh beam, neutral, low oil pressure, turn signals, engine diagnostics, security system (optional), 6-speed, low fuel warnings
StarterElectric

Physical Measures & Capacities

Dryweight320.0 kg (705.5 pounds)
Fuelcapacity18.93 litres (5.00 gallons)
Groundclearance122 mm (4.8 inches)
Oilcapacity3.30 litres (0.22 quarts)
Overalllength2,395 mm (94.3 inches)
Seatheight616 mm (24.3 inches) If adjustable, lowest setting.
Weightincloilgasetc333.0 kg (734.1 pounds)

About Harley-Davidson

Country of Origin: United States
Founder: William S. Harley, Arthur Davidson, Walter Davidson, William A. Davidson
Best Known For: V-twin cruisers, touring icons, H-D culture; also LiveWire electric spinoff

Company History

Founded in Milwaukee in 1903, Harley-Davidson grew from backyard shed to global symbol. Early board-trackers and military machines proved durability; postwar big twins defined American road culture with a cadence and silhouette that became shorthand for freedom. The company professionalized long-distance comfort—Electra Glide fairings, air shocks, and later sophisticated infotainment—while keeping a mechanical identity built on a 45° V-twin heartbeat. Harley also navigated reinvention: the Evolution engine restored reliability in the 1980s; rubber mounting tamed vibes; and fuel injection, ABS, and ride-by-wire brought modernity. The brand’s culture—H.O.G. rides, dealer events, customization—turns ownership into community. Recent decades saw expansion into liquid-cooled performance (Revolution X) and true adventure/sport segments (Pan America, Sportster S), while LiveWire broke ground in electric motorcycling. Historically, Harley’s significance extends beyond machines: it’s a maker of rituals and myth, exporting an American idea of the open road. The tension between heritage and innovation defines each new model year, but the throughline is tactile connection—torque-rich roll-on, slow idle, and a sense that the bike has a pulse.

Other Years

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