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Harley-Davidson Nightster Special vs Yuki Hammer 125
ESTIMATED SIMULATION
Run the comparison →The Harley-Davidson Nightster Special (2025) and the Yuki Hammer 125 (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 Harley-Davidson Nightster Special is a cruiser with 975 cc, 88.5 hp and 225 kg; the Yuki Hammer 125 is a naked bike with 124 cc, 9.1 hp and unlisted weight. Power-to-weight with the rider: 295.0 hp/ton versus 47.6 hp/ton. On this measure the Harley-Davidson Nightster Special is 519% ahead.
0-100 km/h (speedometer): Harley-Davidson Nightster Special 3.17 s, Yuki Hammer 125 not reached (top simulated speed 69 km/h). 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 Nightster Special (ABS unknown, class assumption: no ABS) and 17.3 m for the Yuki Hammer 125 (ABS unknown, class assumption: no ABS). The Yuki Hammer 125 stops 0.4 m shorter. The standard 60-0 test is used because one calculated top speed is below 110 km/h. Calculated top speed: 180 km/h (estimated from power and drag) versus 83 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 the Harley-Davidson Nightster Special and class-average calibration (no accepted model-specific road test) for the Yuki Hammer 125. Open the interactive app (currently in Turkish) to watch the run side by side and change the load.
| Estimated simulation | Harley-Davidson Nightster Special | Yuki Hammer 125 |
|---|---|---|
| Class | cruiser | naked bike |
| Engine | 975 cc | 124 cc |
| Power | 88.5 hp | 9.1 hp |
| Wet weight | 225 kg | no data |
| Power-to-weight (75 kg rider) | 295.0 hp/ton | 47.6 hp/ton |
| 0-100 km/h (speedometer) | 3.17 s | not reached (top simulated speed 69 km/h) |
| 60-0 km/h braking distance | 17.7 m | 17.3 m |
| Top speed (calc.) | 180 km/h | 83 km/h |
Data sources and calibration
Specifications: the sources below (manufacturer pages, plus road-test or spec sites where the manufacturer gives no figure). Acceleration, braking and top speed: Moto Kıyas physics simulation (power/torque curve, gearing, drag, traction and wheelie limits, ABS assumption), calibrated against published road tests where available. Estimated, not measured.
- Harley-Davidson Nightster Special: www.harley-davidson.com
- Yuki Hammer 125: yukimotor.com.tr