2013 Harley-Davidson Softail Fat Boy Technical Analysis & Specification Breakdown
Engineered by Harley-Davidson for the custom - cruiser motorcycle segment, the 2013 Harley-Davidson Softail Fat Boy utilizes a 1688 cc (103 cu in) air-cooled v2, four-stroke layout. In factory specification, maximum torque reaches 133.8 Nm (98.7 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 98.4 x 111.3 mm (3.9 x 4.4 inches) with a 9.6:1 compression ratio.
On the scales, the Softail Fat Boy measures 330.2 kg (728 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 635 mm (25 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 18.93-liter (5 US gal) fuel tank paired with a rated consumption of 5.6 L/100 km provides an estimated theoretical range of roughly 338 km (210 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 8 indexed model years from 1998 to 2019, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Theoretical Range
~338 km (210 mi)
Engine
Displacement1688.0 ccm (103.00 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsAir-cooled, Twin Cam 103B™
Torque133.8 Nm (13.6 kgf-m or 98.7 ft.lbs) @ 3000 RPM
Compression9.6:1
Bore x Stroke98.4 x 111.3 mm (3.9 x 4.4 inches)
Fuel SystemInjection. Electronic Sequential Port Fuel Injection (ESPFI)
CoolingAir
Transmission
Gearbox6-speed
Final DriveBelt (final drive)
ClutchMulti-plate with diaphragm spring in oil bath
DrivelinePrimary chain, 34/46 ratio
Performance
Fuel Consumption5.60 litres/100 km (17.9 km/l or 42.00 mpg)
Greenhouse Gases129.9 CO2 g/km. (CO2 - Carbon dioxide emission)
ExhaustChrome, over/under shotgun exhaust with dual mufflers
Chassis
Rake31.0°
Trail147 mm (5.8 inches)
Wheelbase1638 mm (64.5 inches)
Ground Clearance130 mm (5.1 inches)
Wheels & Brakes
Front Tyre140/75-R17
Rear Tyre200/55-R17
Front BrakesDouble disc. 4-piston
Rear BrakesSingle disc. 2-piston
WheelsSilver, Bullet Hole Disc Cast Aluminum
Dimensions & Weight
Dry Weight313.0 kg (690.0 pounds)
Weight incl.330.2 kg (728.0 pounds)
Seat Height635 mm (25.0 inches) If adjustable, lowest setting.
Overall Length2395 mm (94.3 inches)
Fuel Capacity18.93 litres (5.00 US gallons)
Oil Capacity3.30 litres (3.49 US quarts)
Other
StarterElectric
Color OptionsMidnight Pearl, Ember Red Sunglo/Merlot, Vivid Black, Big Blue Pearl
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
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
