Harley-Davidson Fat Boy vs KTM 350 EXC-F

The Harley-Davidson Fat Boy (2025) and the KTM 350 EXC-F (2025) are compared with the same Moto Kıyas physics model under identical conditions: flat dry asphalt, no wind, a 75 kg rider and no passenger. The Harley-Davidson Fat Boy is a cruiser with 1,923 cc, 103.3 hp and 315 kg; the KTM 350 EXC-F is a enduro bike with 350 cc, unlisted power and unlisted weight. Power-to-weight with the rider: 264.8 hp/ton versus no data.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the KTM 350 EXC-F in 5.62 s; the Harley-Davidson Fat Boy is quicker by 2.07 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 49.1 m for the Harley-Davidson Fat Boy (ABS unknown, class assumption: no ABS) and 51.5 m for the KTM 350 EXC-F (ABS unknown, class assumption: no ABS). The Harley-Davidson Fat Boy stops 2.3 m shorter. Calculated top speed: 201 km/h (estimated from power and drag) versus 138 km/h (estimated from power and drag).

All values are an estimated simulation, not road-test measurements. Technical data comes from the sources listed below; the model uses class-average calibration (no accepted model-specific road test) for both. Missing manufacturer data (power, torque, weight) is estimated by class regression, not measured. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.