Harley-Davidson Fat Boy vs Yamaha PG-1

The Harley-Davidson Fat Boy (2025) and the Yamaha PG-1 (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 Fat Boy is a cruiser with 1,923 cc, 103.3 hp and 315 kg; the Yamaha PG-1 is a cub / underbone with 114 cc, unlisted power and 109 kg. Power-to-weight with the rider: 264.8 hp/ton versus no data.

In the simulation the Harley-Davidson Fat Boy covers 0-100 km/h (speedometer) in 3.54 s and the Yamaha PG-1 in 29.82 s; the Harley-Davidson Fat Boy is quicker by 26.28 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 Fat Boy (ABS unknown, class assumption: no ABS) and 16.9 m for the Yamaha PG-1 (with ABS). The Yamaha PG-1 stops 0.8 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 201 km/h (estimated from power and drag) versus 93 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 (power, torque) 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.