Harley-Davidson Fat Boy 117 2025 vs. Harley-Davidson Softail Fat Boy Special FLSTFB 2017

Technical Specifications Harley-Davidson Fat Boy 117 2025 compared to Harley-Davidson Softail Fat Boy Special FLSTFB 2017

Harley-Davidson Fat Boy 117 2025

Harley-Davidson Softail Fat Boy Special FLSTFB 2017

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Differences

Harley-Davidson Fat Boy 117 2025

Harley-Davidson Softail Fat Boy Special FLSTFB 2017

Engine and Drive Train

Bore	Bore	103.5 mm	Bore	98.4 mm
Stroke	Stroke	114.3 mm	Stroke	111.1 mm
Engine power	Engine power	104.5 HP	Engine power	75 HP
Rpm at Max. Power	Rpm at Max. Power	5,020 rpm	Rpm at Max. Power	5,020 rpm
Torque	Torque	168 Nm	Torque	126 Nm
Rpm at Torque	Rpm at Torque	3,000 rpm	Rpm at Torque	3,000 rpm
Compression Ratio	Compression Ratio	10.3	Compression Ratio	9.7
Fuel system	Fuel system	Injection	Fuel system	Injection
Starter	Starter	Electric	Starter	Electric
Transmission	Transmission	Belt	Transmission	Belt
Transmission Type	Transmission Type	Gearshift	Transmission Type	Gearshift
Number of gears	Number of gears	6	Number of gears	6
Displacement	Displacement	1,923 ccm	Displacement	1,690 ccm

Suspension Front

Front suspension	Front suspension	Telescopic fork	Front suspension	Telescopic fork

Chassis

Frame	Frame	Steel	Frame	Steel
Rake	Rake	30 degree	Rake	31.6 degree
Trail	Trail	104 mm	Trail	147 mm

Brakes Front

Type	Type	Single disk	Type	Single disk
Piston	Piston	Four pistons	Piston	Four pistons
Shock mount	Shock mount	Fixed caliper	Shock mount	Fixed caliper

Brakes Rear

Type	Type	Disc	Type	Disc
Piston	Piston	Double piston	Piston	Double piston
Shock mount	Shock mount	Floating caliper	Shock mount	Floating caliper

Dimensions and Weights

Front tyre width	Front tyre width	160 mm	Front tyre width	140 mm
Front tyre height	Front tyre height	60 %	Front tyre height	75 %
Front tyre diameter	Front tyre diameter	18 inch	Front tyre diameter	17 inch
Rear tyre width	Rear tyre width	240 mm	Rear tyre width	200 mm
Rear tyre height	Rear tyre height	40 %	Rear tyre height	55 %
Rear tyre diameter	Rear tyre diameter	18 inch	Rear tyre diameter	17 inch
Length	Length	2,365 mm	Length	2,385 mm
Width	Width	965 mm	Width	990 mm
Wheelbase	Wheelbase	1,650 mm	Wheelbase	1,630 mm
Seat Height	Seat Height	675 mm	Seat Height	670 mm
Kerb Weight (with ABS)	Kerb Weight (with ABS)	315 kg	Kerb Weight (with ABS)	332 kg
Fuel Tank Capacity	Fuel Tank Capacity	18.9 l	Fuel Tank Capacity	18.9 l