Honda SH125i vs Kawasaki Vulcan S

The Honda SH125i (2025) and the Kawasaki Vulcan S (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 SH125i is a scooter with 125 cc, 12.9 hp and 138 kg; the Kawasaki Vulcan S is a cruiser with 649 cc, 59.9 hp and unlisted weight. Power-to-weight with the rider: 60.4 hp/ton versus 226.5 hp/ton. On this measure the Kawasaki Vulcan S is 275% ahead.

In the simulation the Honda SH125i covers 0-100 km/h (speedometer) in 19.13 s and the Kawasaki Vulcan S in 4.49 s; the Kawasaki Vulcan S is quicker by 14.65 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 16.3 m for the Honda SH125i (with ABS) and 16.1 m for the Kawasaki Vulcan S (with ABS). The Kawasaki Vulcan S stops 0.2 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 97 km/h (manufacturer claim) versus 173 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 model-specific parameters calibrated against published road tests 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.