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Specifications forHarley-Davidson Fat Boy
Specifications	Harley-Davidson Fat Boy Harley-Davidson · 2026
Engine
DisplacementGreater displacement does not necessarily mean better performance.	117cu in
Maximum powerMore power. Acceleration also depends on weight and the drivetrain.	77kW 103 HP / 77 kW @ 4800 rpm
Maximum torqueMore torque. Engine speed and gearing also affect pulling power.	170.8Nm 126 ft-lbs
Engine	Milwaukee-Eight 117 Custom
Cylinders	2
Cylinder arrangement	V-twin
Torque speed	3000rpm
Compression ratio	10.3:1
Fuel system	Electronic Sequential Port Fuel Injection (ESPFI)
Dimensions and weight
Ready-to-ride weightLower weight with fuel and fluids, assessed separately from dry weight.	314.8kg 694 lb.
Length	2364.7mm 93.1 in.
Width	1016mm 40 in.
Wheelbase	1651mm 65 in.
Ground clearance	124.5mm 4.9 in.
Seat height, laden	657.9mm 25.9 in.
Consumption and drivetrain
Fuel tank capacityA larger tank. Range also depends on fuel consumption.	18.9L 5 gal.
Chassis, brakes and suspension
Anti-lock braking (ABS)ABS status for this variant. “—” means data is unavailable.	Unknown Disc · Disc
Front tyre	160/60R18,70V,BW
Rear tyre	240/40R18,79V,BW
Front suspension	Telescopic fork, 49 mm
Rear suspension	Hidden Softail rear suspension with preload adjustment
Front brake	Disc
Rear brake	Disc
Fuel and transmission
Transmission	Six-speed manual
Data source	Specification source

Specifications forHarley-Davidson Fat Boy
Harley-Davidson Fat Boy
Engine
DisplacementGreater displacement does not necessarily mean better performance.
117cu in
Maximum powerMore power. Acceleration also depends on weight and the drivetrain.
77kW 103 HP / 77 kW @ 4800 rpm
Maximum torqueMore torque. Engine speed and gearing also affect pulling power.
170.8Nm 126 ft-lbs
Engine
Milwaukee-Eight 117 Custom
Cylinders
2
Cylinder arrangement
V-twin
Torque speed
3000rpm
Compression ratio
10.3:1
Fuel system
Electronic Sequential Port Fuel Injection (ESPFI)
Dimensions and weight
Ready-to-ride weightLower weight with fuel and fluids, assessed separately from dry weight.
314.8kg 694 lb.
Length
2364.7mm 93.1 in.
Width
1016mm 40 in.
Wheelbase
1651mm 65 in.
Ground clearance
124.5mm 4.9 in.
Seat height, laden
657.9mm 25.9 in.
Consumption and drivetrain
Fuel tank capacityA larger tank. Range also depends on fuel consumption.
18.9L 5 gal.
Chassis, brakes and suspension
Anti-lock braking (ABS)ABS status for this variant. “—” means data is unavailable.
Unknown Disc · Disc
Front tyre
160/60R18,70V,BW
Rear tyre
240/40R18,79V,BW
Front suspension
Telescopic fork, 49 mm
Rear suspension
Hidden Softail rear suspension with preload adjustment
Front brake
Disc
Rear brake
Disc
Fuel and transmission
Transmission
Six-speed manual
Data source
Specification source

Green marks an advantage in that specification. “—” means data is unavailable.

Harley-Davidson Fat Boy