moped / default rider 183 cm
Yamaha Nouvo SX vs Yamaha Sirius FI ergonomics
Yamaha Nouvo SX and Yamaha Sirius FI 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
Yamaha Nouvo SX
All contacts reached
Yamaha Sirius FI
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 Yamaha Nouvo SX lists a 776 mm seat; the Yamaha Sirius FI lists 775 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 | Yamaha Nouvo SX | Yamaha Sirius FI |
|---|---|---|
| Seat height | 776 mm | 775 mm |
| Wheelbase | 1,290 mm | 1,235 mm |
| Wet weight | - | 98 kg |
| Displacement | 124 cc | 113 cc |
Posture metrics
Knee angle
- Yamaha Nouvo SX
- Sport (57.7 deg)
- Yamaha Sirius FI
- Sport (57.6 deg)
Hip angle
- Yamaha Nouvo SX
- Neutral (97.6 deg)
- Yamaha Sirius FI
- Neutral (98.8 deg)
Elbow angle
- Yamaha Nouvo SX
- Relaxed (143.3 deg)
- Yamaha Sirius FI
- Relaxed (143.3 deg)
Torso lean
- Yamaha Nouvo SX
- Neutral (9.6 deg)
- Yamaha Sirius FI
- Neutral (8.8 deg)