2025
Fat Boy®
2025 Fat Boy®
Adored since day one, the singular Fat Boy stands out with bright chrome and bold finishes, and now it is better than ever with a big Milwaukee-Eight® 117 Custom V-twin engine.
Disclaimer: Vehicle shown may vary visually by market and may differ from vehicles manufactured and delivered. Availability may vary by market, please see your local dealer for details.
Key features
Specifications
Length2375 mm
Seat height, unladen665 mm
Ground clearance115 mm
Rake34
Trail145 mm
Wheelbase1695 mm
Tyres, front specifications130/60B21,63H,BW
Tyres, rear specifications240/40R18,79V,BW
Fuel capacity18.9 l
Oil capacity4.7 l
Weight, as shipped297 kg
Weight, in running order308.90 kg
Tyre, typeMichelin® Scorcher 11, front and rear
EngineMilwaukee-Eight® 117 Custom
Bore103.5 mm
Stroke114.3 mm
Displacement1923 cm3
Compression ratio10.3:1
Fuel systemElectronic Sequential Port Fuel Injection (ESPFI)
Exhaust2-into-2 staggered; catalyst in muffler
Engine torque testing methodEC 134/2014
Engine torque171 Nm
Engine torque (RPM)3000
Horsepower104 HP / 77 kW @ 4800 rpm
Lean angle, right (deg.)26.8
Lean angle, left (deg.)26.8
Fuel economy testing methodEU 134/2014
Fuel economy49 mpg (4.8 l/100 km)
Primary driveChain, 34/46 ratio
Gear ratios (overall) 1st9.311
Gear ratios (overall) 2nd6.454
Gear ratios (overall) 3rd4.793
Gear ratios (overall) 4th3.882
Gear ratios (overall) 5th3.307
Gear Ratios (overall) 6th2.79
Front forkDual-bending valve 49 mm telescopic with aluminum fork triple clamps; dual rate spring
Rear shocksHidden, free piston, coil-over monoshock; 43mm stroke; hydraulic preload adjustment
Wheels, front typeGloss black, 26-spoke cast aluminum
Wheels, rear typeGloss black, 26-spoke cast aluminum
Brakes, typeFront and rear black, Split 7-spoke floating rotors
Brakes, caliper type4-piston fixed front and 2-piston floating rear
- Billiard Grey
- Vivid Black
- Blue Burst
- Whiskey Fire / Vivid Black