standard / default rider 183 cm
Kawasaki KZ400 vs Yamaha XSR125 ergonomics
Kawasaki KZ400 and Yamaha XSR125 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Kawasaki KZ400
All contacts reached
Yamaha XSR125
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Kawasaki KZ400 has a 830 mm seat; the Yamaha XSR125 sits at 815 mm — a 15 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 83 cm for the Kawasaki KZ400 and 82 cm for the Yamaha XSR125.
That makes the Yamaha XSR125 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Kawasaki KZ400 gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.
Geometry snapshot
| Spec | Kawasaki KZ400 | Yamaha XSR125 |
|---|---|---|
| Seat height | 830 mm | 815 mm |
| Wheelbase | 1,360 mm | 1,330 mm |
| Wet weight | - | 140 kg |
| Displacement | 398 cc | 124 cc |
Posture metrics
Knee angle
- Kawasaki KZ400
- Sport (57.9 deg)
- Yamaha XSR125
- Sport (57.8 deg)
Hip angle
- Kawasaki KZ400
- Neutral (95.9 deg)
- Yamaha XSR125
- Neutral (96.6 deg)
Elbow angle
- Kawasaki KZ400
- Relaxed (143.3 deg)
- Yamaha XSR125
- Relaxed (143.3 deg)
Torso lean
- Kawasaki KZ400
- Neutral (10.7 deg)
- Yamaha XSR125
- Neutral (10.3 deg)