Honda CB125F vs Kawasaki Z900

The Honda CB125F (2025) and the Kawasaki Z900 (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 CB125F is a naked bike with 124 cc, 10.7 hp and 117 kg; the Kawasaki Z900 is a naked bike with 948 cc, 122.0 hp and 213 kg. Power-to-weight with the rider: 55.9 hp/ton versus 423.7 hp/ton. On this measure the Kawasaki Z900 is 658% ahead.

In the simulation the Honda CB125F covers 0-100 km/h (speedometer) in 21.61 s and the Kawasaki Z900 in 3.13 s; the Kawasaki Z900 is quicker by 18.48 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 17.3 m for the Honda CB125F (ABS unknown, class assumption: no ABS) and 15.7 m for the Kawasaki Z900 (with ABS). The Kawasaki Z900 stops 1.6 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 100 km/h (manufacturer claim) versus 234 km/h (manufacturer claim).

All values are an estimated simulation, not road-test measurements. Technical data comes from the sources listed below; the model uses model-specific parameters calibrated against published road tests for both. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.