motocross / default rider 183 cm
Suzuki RM125 vs Yamaha YZ490 ergonomics
Suzuki RM125 and Yamaha YZ490 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
Suzuki RM125
All contacts reached
Yamaha YZ490
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 Suzuki RM125 lists a 950 mm seat; the Yamaha YZ490 lists 950 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 | Suzuki RM125 | Yamaha YZ490 |
|---|---|---|
| Seat height | 950 mm | 950 mm |
| Wheelbase | 1,450 mm | 1,501 mm |
| Wet weight | - | - |
| Displacement | 125 cc | 487 cc |
Posture metrics
Knee angle
- Suzuki RM125
- Sport (58.1 deg)
- Yamaha YZ490
- Sport (58.2 deg)
Hip angle
- Suzuki RM125
- Neutral (94.0 deg)
- Yamaha YZ490
- Neutral (92.9 deg)
Elbow angle
- Suzuki RM125
- Relaxed (143.3 deg)
- Yamaha YZ490
- Relaxed (143.3 deg)
Torso lean
- Suzuki RM125
- Neutral (12.0 deg)
- Yamaha YZ490
- Neutral (12.8 deg)