motocross / default rider 183 cm
Fantic XX 125 vs Yamaha YZ250F ergonomics
Fantic XX 125 and Yamaha YZ250F 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
Fantic XX 125
All contacts reached
Yamaha YZ250F
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 Fantic XX 125 lists a 975 mm seat; the Yamaha YZ250F lists 970 mm — a 5 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 Yamaha YZ250F 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 | Fantic XX 125 | Yamaha YZ250F |
|---|---|---|
| Seat height | 975 mm | 970 mm |
| Wheelbase | 1,440 mm | 1,481 mm |
| Wet weight | 90 kg | 107 kg |
| Displacement | 125 cc | 250 cc |
Posture metrics
Knee angle
- Fantic XX 125
- Sport (58.0 deg)
- Yamaha YZ250F
- Sport (58.1 deg)
Hip angle
- Fantic XX 125
- Neutral (94.3 deg)
- Yamaha YZ250F
- Neutral (93.4 deg)
Elbow angle
- Fantic XX 125
- Relaxed (143.3 deg)
- Yamaha YZ250F
- Relaxed (143.3 deg)
Torso lean
- Fantic XX 125
- Neutral (11.9 deg)
- Yamaha YZ250F
- Neutral (12.5 deg)