Kawasaki Ninja 500 vs Yamaha R25

The Kawasaki Ninja 500 (2026) and the Yamaha R25 (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 Kawasaki Ninja 500 is a sport bike with 451 cc, 44.8 hp and unlisted weight; the Yamaha R25 is a sport bike with 250 cc, 35.4 hp and 169 kg. Power-to-weight with the rider: 172.9 hp/ton versus 145.1 hp/ton. On this measure the Kawasaki Ninja 500 is 19% ahead.

In the simulation the Kawasaki Ninja 500 covers 0-100 km/h (speedometer) in 5.09 s and the Yamaha R25 in 6.40 s; the Kawasaki Ninja 500 is quicker by 1.32 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 36.4 m for the Kawasaki Ninja 500 (with ABS) and 40.0 m for the Yamaha R25 (ABS unknown, class assumption: no ABS). The Kawasaki Ninja 500 stops 3.6 m shorter. Calculated top speed: 186 km/h (estimated from power and drag) versus 158 km/h (GPS measurement).

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 the Kawasaki Ninja 500 and model-specific parameters calibrated against published road tests for the Yamaha R25. 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.