motocross / default rider 183 cm
Beta Motor RX 4T 450 vs Kawasaki KX125 ergonomics
Beta Motor RX 4T 450 and Kawasaki KX125 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
Beta Motor RX 4T 450
All contacts reached
Kawasaki KX125
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 Beta Motor RX 4T 450 lists a 945 mm seat; the Kawasaki KX125 lists 945 mm, within a few millimetres of each other. 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.
Geometry snapshot
| Spec | Beta Motor RX 4T 450 | Kawasaki KX125 |
|---|---|---|
| Seat height | 945 mm | 945 mm |
| Wheelbase | 1,475 mm | 1,471 mm |
| Wet weight | - | - |
| Displacement | 449 cc | 124 cc |
Posture metrics
Knee angle
- Beta Motor RX 4T 450
- Sport (58.1 deg)
- Kawasaki KX125
- Sport (58.1 deg)
Hip angle
- Beta Motor RX 4T 450
- Neutral (93.5 deg)
- Kawasaki KX125
- Neutral (93.6 deg)
Elbow angle
- Beta Motor RX 4T 450
- Relaxed (143.3 deg)
- Kawasaki KX125
- Relaxed (143.3 deg)
Torso lean
- Beta Motor RX 4T 450
- Neutral (12.4 deg)
- Kawasaki KX125
- Neutral (12.3 deg)