enduro / default rider 183 cm
GasGas EC 300 GP vs Yamaha YZ250FX ergonomics
GasGas EC 300 GP and Yamaha YZ250FX 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
GasGas EC 300 GP
All contacts reached
Yamaha YZ250FX
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 GasGas EC 300 GP lists a 956 mm seat; the Yamaha YZ250FX lists 955 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 | GasGas EC 300 GP | Yamaha YZ250FX |
|---|---|---|
| Seat height | 956 mm | 955 mm |
| Wheelbase | 1,489 mm | 1,470 mm |
| Wet weight | - | 110 kg |
| Displacement | 293 cc | 250 cc |
Posture metrics
Knee angle
- GasGas EC 300 GP
- Sport (58.1 deg)
- Yamaha YZ250FX
- Sport (58.1 deg)
Hip angle
- GasGas EC 300 GP
- Neutral (93.2 deg)
- Yamaha YZ250FX
- Neutral (93.6 deg)
Elbow angle
- GasGas EC 300 GP
- Relaxed (143.3 deg)
- Yamaha YZ250FX
- Relaxed (143.3 deg)
Torso lean
- GasGas EC 300 GP
- Neutral (12.6 deg)
- Yamaha YZ250FX
- Neutral (12.3 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 | GasGas EC 300 GP | Yamaha YZ250FX |
|---|---|---|
| 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" | Balls of feet | Balls of feet |
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
GasGas EC 300 GP and Yamaha YZ250FX are both enduro bikes, so the practical question is which of their real differences you'd actually feel. On seat height, wheelbase, wet weight, and the modeled knee, torso-lean, and posture-score deltas, this pair sits inside the range where two bikes fit alike for a given rider — nothing here clears a difference most riders would notice from the saddle. That is a legitimate result, not a missing analysis: some same-category neighbors really are interchangeable on paper. The honest takeaway is to let other factors decide — running costs, service network, styling, availability — because ergonomics alone won't separate GasGas EC 300 GP from Yamaha YZ250FX for most riders. Load your own height and inseam into the simulator below to see whether your specific proportions turn up a difference the class averages hide, then confirm both bikes in person before you commit.
Kit out either bike
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