motocross / default rider 183 cm
Fantic XX 250 vs Yamaha YZ250F ergonomics
Fantic XX 250 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.
Posture overlay
The default rider's modeled seated posture on each bike, solved from the same geometry as the score panels and overlaid on one ground line so seat height and reach differences are visible at a glance.
Modeled fit comparison
Fantic XX 250
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 250 lists a 970 mm seat; the Yamaha YZ250F lists 970 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 | Fantic XX 250 | Yamaha YZ250F |
|---|---|---|
| Seat height | 970 mm | 970 mm |
| Wheelbase | 1,485 mm | 1,481 mm |
| Wet weight | 98 kg | 107 kg |
| Displacement | 249 cc | 250 cc |
Posture metrics
Knee angle
- Fantic XX 250
- Sport (58.1 deg)
- Yamaha YZ250F
- Sport (58.1 deg)
Hip angle
- Fantic XX 250
- Neutral (93.2 deg)
- Yamaha YZ250F
- Neutral (93.4 deg)
Elbow angle
- Fantic XX 250
- Relaxed (143.3 deg)
- Yamaha YZ250F
- Relaxed (143.3 deg)
Torso lean
- Fantic XX 250
- Neutral (12.5 deg)
- Yamaha YZ250F
- Neutral (12.5 deg)
Fit by rider height
Modeled ground contact by rider height, in 5 bands from 5'2" to 6'4" (158-193 cm).
| Rider height | Fantic XX 250 | Yamaha YZ250F |
|---|---|---|
| 158 cm / 5'2" | Tiptoe only | Tiptoe only |
| 167 cm / 5'6" | Tiptoe only | Tiptoe only |
| 176 cm / 5'9" | Tiptoe only | Tiptoe only |
| 184 cm / 6'0" | Tiptoe only | Tiptoe only |
| 193 cm / 6'4" | Tiptoe only | Tiptoe only |
Modeled from each bike's seat height and a typical inseam-to-height ratio only — not a flat-footing guarantee. Real ground contact still depends on seat shape, suspension sag, footwear, and your own proportions. Confirm on the motorcycle.
Verdict
Fantic XX 250 and Yamaha YZ250F are both motocross bikes, so the practical question is which of their real differences you'd actually feel. Fantic XX 250 is about 9 kg lighter wet than Yamaha YZ250F, which tends to show up most when paddling backward out of a parking spot or picking the bike up off the sidestand. None of that adds up to a clear overall winner in the modeled posture score, so the individual differences above are the more useful comparison than the headline number. Treat every figure here as a planning estimate: seat width, suspension sag, footwear, and your own proportions can shift the real feel more than a few millimetres or degrees on paper. Load your height and inseam into the simulator, then sit on both before you decide.
Kit out either bike
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