Kawasaki Ninja 500 vs RKS RZ125

The Kawasaki Ninja 500 (2026) and the RKS RZ125 (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 Kawasaki Ninja 500 is a sport bike with 451 cc, 44.8 hp and unlisted weight; the RKS RZ125 is a sport bike with 125 cc, 14.5 hp and unlisted weight. Power-to-weight with the rider: 172.9 hp/ton versus 63.8 hp/ton. On this measure the Kawasaki Ninja 500 is 171% ahead.

In the simulation the Kawasaki Ninja 500 covers 0-100 km/h (speedometer) in 5.09 s and the RKS RZ125 in 13.42 s; the Kawasaki Ninja 500 is quicker by 8.33 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 36.4 m for the RKS RZ125 (with ABS). Calculated top speed: 186 km/h (estimated from power and drag) versus 125 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.