RKS RZ125 vs Suzuki DR-Z4S

The RKS RZ125 (2026) and the Suzuki DR-Z4S (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 Suzuki DR-Z4S is a enduro bike with 398 cc, unlisted power and 151 kg. Power-to-weight with the rider: 63.8 hp/ton versus no data.

In the simulation the RKS RZ125 covers 0-100 km/h (speedometer) in 13.42 s and the Suzuki DR-Z4S in 4.98 s; the Suzuki DR-Z4S is quicker by 8.43 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 46.8 m for the Suzuki DR-Z4S (with ABS). The RKS RZ125 stops 10.4 m shorter. Calculated top speed: 125 km/h (estimated from power and drag) versus 145 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 (power, torque) 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.