Harley-Davidson Sportster S vs Suzuki GSX-S1000GX

The Harley-Davidson Sportster S (2025) and the Suzuki GSX-S1000GX (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 Sportster S is a cruiser with 1,252 cc, 120.7 hp and 228 kg; the Suzuki GSX-S1000GX is a touring bike with 999 cc, 150.2 hp and unlisted weight. Power-to-weight with the rider: 398.3 hp/ton versus 485.4 hp/ton. On this measure the Suzuki GSX-S1000GX is 22% ahead.

In the simulation the Harley-Davidson Sportster S covers 0-100 km/h (speedometer) in 2.97 s and the Suzuki GSX-S1000GX in 2.94 s; the Suzuki GSX-S1000GX is quicker by 0.03 s. In the 100-0 km/h brake test, braking distance without the 0.3 s reaction time is 44.7 m for the Harley-Davidson Sportster S (with ABS) and 45.0 m for the Suzuki GSX-S1000GX (ABS unknown, class assumption: no ABS). The Harley-Davidson Sportster S stops 0.3 m shorter. Calculated top speed: 194 km/h (manufacturer claim) versus 217 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.