motocross / default rider 183 cm
KTM 150 SX vs Yamaha YZ125 ergonomics
KTM 150 SX and Yamaha YZ125 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
KTM 150 SX
All contacts reached
Yamaha YZ125
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The KTM 150 SX has a 986 mm seat; the Yamaha YZ125 sits at 980 mm — a 6 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 99 cm for the KTM 150 SX and 98 cm for the Yamaha YZ125.
That makes the Yamaha YZ125 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the KTM 150 SX 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 | KTM 150 SX | Yamaha YZ125 |
|---|---|---|
| Seat height | 986 mm | 980 mm |
| Wheelbase | 1,471 mm | 1,445 mm |
| Wet weight | - | 96 kg |
| Displacement | 144 cc | 125 cc |
Posture metrics
Knee angle
- KTM 150 SX
- Sport (58.1 deg)
- Yamaha YZ125
- Sport (58.0 deg)
Hip angle
- KTM 150 SX
- Neutral (93.6 deg)
- Yamaha YZ125
- Neutral (94.2 deg)
Elbow angle
- KTM 150 SX
- Relaxed (143.3 deg)
- Yamaha YZ125
- Relaxed (143.3 deg)
Torso lean
- KTM 150 SX
- Neutral (12.3 deg)
- Yamaha YZ125
- Neutral (11.9 deg)