scooter / default rider 183 cm
Vespa ET4 150 vs Yamaha XMAX 125 Tech MAX+ ergonomics
Vespa ET4 150 and Yamaha XMAX 125 Tech MAX+ 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
Vespa ET4 150
All contacts reached
Yamaha XMAX 125 Tech MAX+
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 Vespa ET4 150 lists a 805 mm seat; the Yamaha XMAX 125 Tech MAX+ lists 800 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 XMAX 125 Tech MAX+ 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 | Vespa ET4 150 | Yamaha XMAX 125 Tech MAX+ |
|---|---|---|
| Seat height | 805 mm | 800 mm |
| Wheelbase | 1,280 mm | 1,570 mm |
| Wet weight | - | 167 kg |
| Displacement | 150 cc | 125 cc |
Posture metrics
Knee angle
- Vespa ET4 150
- Sport (57.7 deg)
- Yamaha XMAX 125 Tech MAX+
- Sport (58.3 deg)
Hip angle
- Vespa ET4 150
- Neutral (97.7 deg)
- Yamaha XMAX 125 Tech MAX+
- Neutral (91.4 deg)
Elbow angle
- Vespa ET4 150
- Relaxed (143.3 deg)
- Yamaha XMAX 125 Tech MAX+
- Relaxed (143.3 deg)
Torso lean
- Vespa ET4 150
- Neutral (9.5 deg)
- Yamaha XMAX 125 Tech MAX+
- Neutral (13.8 deg)