Harley-Davidson Street Bob vs Honda SH125i

The Harley-Davidson Street Bob (2025) and the Honda SH125i (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 Harley-Davidson Street Bob is a cruiser with 1,923 cc, 91.2 hp and 293 kg; the Honda SH125i is a scooter with 125 cc, 12.9 hp and 138 kg. Power-to-weight with the rider: 247.8 hp/ton versus 60.4 hp/ton. On this measure the Harley-Davidson Street Bob is 310% ahead.

In the simulation the Harley-Davidson Street Bob covers 0-100 km/h (speedometer) in 3.49 s and the Honda SH125i in 19.13 s; the Harley-Davidson Street Bob is quicker by 15.64 s. In the 60-0 km/h brake test, braking distance without the 0.3 s reaction time is 17.7 m for the Harley-Davidson Street Bob (ABS unknown, class assumption: no ABS) and 16.3 m for the Honda SH125i (with ABS). The Honda SH125i stops 1.4 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 194 km/h (estimated from power and drag) versus 97 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 class-average calibration (no accepted model-specific road test) for the Harley-Davidson Street Bob and model-specific parameters calibrated against published road tests for the Honda SH125i. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.