scooter / default rider 183 cm
KYMCO AK 550 vs Yamaha Cygnus X 125 ergonomics
KYMCO AK 550 and Yamaha Cygnus X 125 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
KYMCO AK 550
All contacts reached
Yamaha Cygnus X 125
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 KYMCO AK 550 lists a 785 mm seat; the Yamaha Cygnus X 125 lists 785 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 | KYMCO AK 550 | Yamaha Cygnus X 125 |
|---|---|---|
| Seat height | 785 mm | 785 mm |
| Wheelbase | 1,580 mm | 1,295 mm |
| Wet weight | 226 kg | 120 kg |
| Displacement | 550 cc | 125 cc |
Posture metrics
Knee angle
- KYMCO AK 550
- Sport (58.4 deg)
- Yamaha Cygnus X 125
- Sport (57.7 deg)
Hip angle
- KYMCO AK 550
- Neutral (91.1 deg)
- Yamaha Cygnus X 125
- Neutral (97.5 deg)
Elbow angle
- KYMCO AK 550
- Relaxed (143.3 deg)
- Yamaha Cygnus X 125
- Relaxed (143.3 deg)
Torso lean
- KYMCO AK 550
- Neutral (13.9 deg)
- Yamaha Cygnus X 125
- Neutral (9.7 deg)