| MODEL | HARLEY-DAVIDSON SOFTAIL FAT BOY 117 2025 |
| Year | 2025 |
| Engine Type | Four stroke, V-twin, Milwaukee-Eight 117 Custom, pushrod-operated OHV, hydraulic self-adjusting lifters, 4 valves per cylinder |
| Displacement / Capacity | 1923 cc / 117 cu in |
| Bore X Stroke | 103.5 x 114.3 mm / 4.075 x 4.5 in |
| Compression Ratio | 10.3:1 |
| Cooling System | Air cooled |
| Max Power | 77 kW / 104 hp @ 4800 rpm |
| Max Torque | 171 Nm / 126 lb-ft @ 3000 rpm |
| Ignition | Single-fire, non-wasted, map-controlled spark ignition |
| Induction | Electronic Sequential Port Fuel Injection (ESPFI) |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Pressurized, dry-sump with oil cooler |
| Gear Box | 6 Speed |
| Clutch | Mechanical, 10-plate wet, assist & conventional |
| Final Drive | Belt |
| CHASSIS SPECS | |
| Frame | Mild steel tubular frame, rectangular-section backbone, stamped, cast and forged junctions, MIG welded |
| Front Suspension | 49 mm dual bending valve telescopic fork, dual-rate spring, 130 mm / 5.1 in travel |
| Rear Suspension | Hidden free-piston coil-over monoshock, 43 mm stroke, hydraulic preload adjustment, 86 mm / 3.4 in travel |
| Front Brakes | 2x 300 mm floating discs, 4-piston fixed calipers, cornering ABS |
| Rear Brakes | Single 292 mm floating disc, 2-piston floating caliper, cornering ABS |
| DIMENSION SPECS | |
| Overall Length | 2365 mm / 93.1 in |
| Overall Width | 965 mm / 40.0 in |
| Overall Height | 1120 mm / 44.1 in |
| Seat Height | 675 mm / 26.6 in (unladen), 658 mm / 25.9 in (laden) |
| Wheelbase | 1650 mm / 65 in |
| Ground Clearance | 125 mm / 4.9 in |
| Dry Weight | 303 kg / 668 lbs |
| Wet Weight | 315 kg / 694 lbs |
| WHEEL SPECS | |
| Front Tyre | 160/60R18 70V |
| Rear Tyre | 240/40R18 79V |
| FUEL SYSTEM | |
| Fuel Capacity | 18.9 Litres / 5.0 US gal |
| Fuel Consumption | 5.5 L/100 km / 47 US mpg (est.) |
| Top Speed | — |
The 2025 Fat Boy moved up to the Milwaukee-Eight 117 Custom engine, with a reworked two-into-two exhaust and revised rear monoshock. It also gained a 5-inch combined analogue/LCD display, ride modes, cruise control, USB-C and an electronics package with cornering ABS, traction control, drag-torque slip control and tyre pressure monitoring. The wide-tyre, solid-wheel look of the Fat Boy was kept.
