scooter / default rider 183 cm
KYMCO AK 550 vs Yamaha Zuma 125 ergonomics
KYMCO AK 550 and Yamaha Zuma 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 Zuma 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 Zuma 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 Zuma 125 |
|---|---|---|
| Seat height | 785 mm | 785 mm |
| Wheelbase | 1,580 mm | 1,341 mm |
| Wet weight | 226 kg | 128 kg |
| Displacement | 550 cc | 125 cc |
Posture metrics
Knee angle
- KYMCO AK 550
- Sport (58.4 deg)
- Yamaha Zuma 125
- Sport (57.8 deg)
Hip angle
- KYMCO AK 550
- Neutral (91.1 deg)
- Yamaha Zuma 125
- Neutral (96.5 deg)
Elbow angle
- KYMCO AK 550
- Relaxed (143.3 deg)
- Yamaha Zuma 125
- Relaxed (143.3 deg)
Torso lean
- KYMCO AK 550
- Neutral (13.9 deg)
- Yamaha Zuma 125
- Neutral (10.4 deg)