Honda Super Cub C125 vs RKS RZ125

The Honda Super Cub C125 (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 Honda Super Cub C125 is a cub / underbone with 123 cc, 9.7 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: 53.0 hp/ton versus 63.8 hp/ton. On this measure the RKS RZ125 is 20% ahead.

In the simulation the Honda Super Cub C125 covers 0-100 km/h (speedometer) in 39.63 s and the RKS RZ125 in 13.42 s; the RKS RZ125 is quicker by 26.22 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 16.9 m for the Honda Super Cub C125 (with ABS) and 13.1 m for the RKS RZ125 (with ABS). The RKS RZ125 stops 3.7 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 93 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.