Honda Super Cub C125 vs Yamaha R25

The Honda Super Cub C125 (2026) and the Yamaha R25 (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 Honda Super Cub C125 is a cub / underbone with 123 cc, 9.7 hp and unlisted weight; the Yamaha R25 is a sport bike with 250 cc, 35.4 hp and 169 kg. Power-to-weight with the rider: 53.0 hp/ton versus 145.1 hp/ton. On this measure the Yamaha R25 is 174% ahead.

In the simulation the Honda Super Cub C125 covers 0-100 km/h (speedometer) in 39.63 s and the Yamaha R25 in 6.40 s; the Yamaha R25 is quicker by 33.23 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 14.4 m for the Yamaha R25 (ABS unknown, class assumption: no ABS). The Yamaha R25 stops 2.4 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 158 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 Honda Super Cub C125 and model-specific parameters calibrated against published road tests for the Yamaha R25. 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.