RKS RZ125 vs Yamaha NMAX 125

The RKS RZ125 (2026) and the Yamaha NMAX 125 (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 NMAX 125 is a scooter with 125 cc, 12.1 hp and 132 kg. Power-to-weight with the rider: 63.8 hp/ton versus 58.3 hp/ton. On this measure the RKS RZ125 is 9% ahead.

In the simulation the RKS RZ125 covers 0-100 km/h (speedometer) in 13.42 s and the Yamaha NMAX 125 in 20.34 s; the RKS RZ125 is quicker by 6.92 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 13.1 m for the RKS RZ125 (with ABS) and 17.9 m for the Yamaha NMAX 125 (ABS unknown, class assumption: no ABS). The RKS RZ125 stops 4.8 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 125 km/h (estimated from power and drag) versus 99 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 NMAX 125. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.