Harley-Davidson Softail Fat Boy: history, specs, pictures

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The Harley-Davidson Softail Fat Boy was a v2, four-stroke custom / cruiser motorcycle produced between 1990 and 2019. It could reach a top speed of 107 mph (173 km/h). Max torque was 106.95 ft/lbs (145.0 Nm) @ 3000 RPM. Claimed horsepower was 84.22 HP (62.8 KW) @ 5020 RPM.

Engine[edit]

The engine was a air cooled v2, four-stroke. A 100.0mm bore x 111.1mm stroke result in a displacement of just 1746.0 cubic centimeters. The engine featured a 10.0:1 compression ratio. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive[edit]

The bike has a 6-speed transmission. The final drive was via belt. Power was moderated via the multi-plate with diaphragm spring in oil bath.

Chassis[edit]

It came with a 160/60-r18 front tire and a 240/40-r18 rear tire. Stopping was achieved via double disc. abs. 4-piston. in the front and a single disc. abs. 2-piston. in the rear. The front suspension was a telescopic fork while the rear was equiped with a twin shocks. The Softail Fat Boy was fitted with a 5.0 Gallon (18.93 Liters) fuel tank. The bike weighed just 670.21 pounds (304.0 Kg). The wheelbase was 65.55 inches (1665 mm) long.

Videos[edit]

In Media[edit]

Harley-Davidson Softail Fat Boy
Manufacturer
Also called 1340 Softail Fat Boy, Fat Boy Injection, FLSTFI Softail Fat Boy, FLSTFSE Screamin Eagle Fat Boy, FLSTFI Fat Boy, FLSTF Fat Boy Peace Officer, FLSTF Fat Boy Firefighter, FLSTFB Sportster Fat Boy Special, FLSTFB Fat Boy Lo, FLSTFB Softail Fat Boy Lo, FLSTF Softail Fat Boy, Fat Boy Lo110th Anniversary, Fat Boy Lo 110th Anniversary, Softail Fat Boy Special, Fat Boy S, Softail Fat Boy Lo, Softail Fat Boy S, 115th Anniversary Fat Boy114 (ANV), 115th Anniversary Fat Boy 114 (ANV), Softail Fat Boy114, Softail Fat Boy 114, FLSTFB Fat Boy Special, FLSTF Fat Boy, Fat Boy Special, Fat Boy
Production 1990 - 2019
Engine
v2, four-stroke
Bore / Stroke 100.0mm x 111.1mm
Top Speed 107 mph (173 km/h)
Horsepower 84.22 HP (62.8 KW) @ 5020RPM
Torque 106.95 ft/lbs (145.0 Nm) @ 3000RPM
Fuel System injection. electronic sequential port fuel injection
Battery 10.0:1
Transmission Gear box: 6-speed

Final Drive: belt

Clutch: multi-plate with diaphragm spring in oil bath
Suspension Front: telescopic fork
Rear: twin shocks
Brakes Front: double disc. abs. 4-piston.
Rear: single disc. abs. 2-piston.
Front Tire 160/60-r18
Rear Tire 240/40-r18
Wheelbase 65.55 inches (1665 mm)
Length 93.31 inches (2370 mm)
Height 42.72 inches (1085 mm)
Seat Height 26.57 inches (675 mm)
Weight 670.21 pounds (304.0 Kg) (dry), 317.0 kg (wet)
Oil Capacity 1.24 Gallon (4.70 Liters)
Fuel Capacity 5.0 Gallon (18.93 Liters)
Fuel Consumption 5.00 liters/100 km (20.0 km/l or 47.04 mpg)
Manuals Service Manual


The Harley-Davidson Softail Fat Boy was a v2, four-stroke standard produced by Harley-Davidson between 1990 and 2019. It could reach a top speed of 107 mph (173 km/h). Max torque was 106.95 ft/lbs (145.0 Nm) @ 3000 RPM. Claimed horsepower was 84.22 HP (62.8 KW) @ 5020 RPM.

Engine[edit]

The engine was a air cooled v2, four-stroke. A 100.0mm bore x 111.1mm stroke result in a displacement of just 1746.0 cubic centimeters. Fuel was supplied via a double overhead cams/twin cam (dohc).

Drive[edit]

The bike has a 6-speed transmission. Power was moderated via the multi-plate with diaphragm spring in oil bath.

Chassis[edit]

It came with a 160/60-r18 front tire and a 240/40-r18 rear tire. Stopping was achieved via double disc. abs. 4-piston. in the front and a single disc. abs. 2-piston. in the rear. The front suspension was a telescopic fork while the rear was equipped with a twin shocks. The Softail Fat Boy was fitted with a 5.0 Gallon (18.93 Liters) fuel tank. The bike weighed just 670.21 pounds (304.0 Kg). The wheelbase was 65.55 inches (1665 mm) long.

In Media[edit]



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