Harley-Davidson Fat Boy vs Kawasaki Ninja 1100SX SE

The Harley-Davidson Fat Boy (2025) and the Kawasaki Ninja 1100SX SE (2026) 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 Kawasaki Ninja 1100SX SE is a touring bike with 1,099 cc, 134.1 hp and unlisted weight. Power-to-weight with the rider: 264.8 hp/ton versus 409.9 hp/ton. On this measure the Kawasaki Ninja 1100SX SE is 55% ahead.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Kawasaki Ninja 1100SX SE in 3.30 s; the Kawasaki Ninja 1100SX SE is quicker by 0.24 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 41.0 m for the Kawasaki Ninja 1100SX SE (with ABS). The Kawasaki Ninja 1100SX SE stops 8.1 m shorter. Calculated top speed: 201 km/h (estimated from power and drag) versus 219 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 (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.