Kuba Superlight 125 vs RKS RZ125

The Kuba Superlight 125 (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 Kuba Superlight 125 is a cruiser with 124 cc, 10.5 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: 42.5 hp/ton versus 63.8 hp/ton. On this measure the RKS RZ125 is 50% ahead.

0-100 km/h (speedometer): Kuba Superlight 125 not reached (top simulated speed 91 km/h), RKS RZ125 13.42 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 17.7 m for the Kuba Superlight 125 (ABS unknown, class assumption: no ABS) and 13.1 m for the RKS RZ125 (with ABS). The RKS RZ125 stops 4.6 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 90 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. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.