RKS RZ125 vs Yamaha XMAX 250

The RKS RZ125 (2026) and the Yamaha XMAX 250 (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 RKS RZ125 is a sport bike with 125 cc, 14.5 hp and unlisted weight; the Yamaha XMAX 250 is a scooter with 250 cc, 22.4 hp and 183 kg. Power-to-weight with the rider: 63.8 hp/ton versus 86.8 hp/ton. On this measure the Yamaha XMAX 250 is 36% ahead.

In the simulation the RKS RZ125 covers 0-100 km/h (speedometer) in 13.42 s and the Yamaha XMAX 250 in 11.65 s; the Yamaha XMAX 250 is quicker by 1.77 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 36.4 m for the RKS RZ125 (with ABS) and 45.2 m for the Yamaha XMAX 250 (with ABS). The RKS RZ125 stops 8.8 m shorter. Calculated top speed: 125 km/h (estimated from power and drag) versus 126 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 RKS RZ125 and model-specific parameters calibrated against published road tests for the Yamaha XMAX 250. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.