motocross / default rider 183 cm
KTM 125 SX vs Yamaha YZ125 ergonomics
KTM 125 SX and Yamaha YZ125 have modeled posture scores within three points for the 183 cm default rider. Treat this as a planning estimate; posture preference, data confidence, and a real test sit still matter.
Modeled fit comparison
KTM 125 SX
All contacts reached
Yamaha YZ125
All contacts reached
The modeled scores are within three points, so the result does not distinguish a higher-scoring bike. Treat the result as a planning estimate and compare each bike's geometry confidence before a real test sit.
Rider fit: reaching the ground
The KTM 125 SX lists a 925 mm seat; the Yamaha YZ125 lists 935 mm — a 10 mm difference. Seat height is only a first-pass ground-reach input. It does not establish safety or actual foot contact. Seat width, suspension sag, boots, mobility, load, and individual proportions can materially change the result.
On seat height alone, the KTM 125 SX has the easier modeled ground reach. Load your measurements into the simulator to compare the model, then verify both motorcycles in person.
Geometry snapshot
| Spec | KTM 125 SX | Yamaha YZ125 |
|---|---|---|
| Seat height | 925 mm | 935 mm |
| Wheelbase | 1,471 mm | 1,450 mm |
| Wet weight | - | - |
| Displacement | 125 cc | 123 cc |
Posture metrics
Knee angle
- KTM 125 SX
- Sport (58.1 deg)
- Yamaha YZ125
- Sport (58.1 deg)
Hip angle
- KTM 125 SX
- Neutral (93.6 deg)
- Yamaha YZ125
- Neutral (94.0 deg)
Elbow angle
- KTM 125 SX
- Relaxed (143.3 deg)
- Yamaha YZ125
- Relaxed (143.3 deg)
Torso lean
- KTM 125 SX
- Neutral (12.3 deg)
- Yamaha YZ125
- Neutral (12.0 deg)