standard / default rider 183 cm
Kawasaki Zephyr 550 vs Yamaha Seca II ergonomics
Kawasaki Zephyr 550 and Yamaha Seca II 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
Kawasaki Zephyr 550
All contacts reached
Yamaha Seca II
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 Kawasaki Zephyr 550 lists a 770 mm seat; the Yamaha Seca II lists 770 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 | Kawasaki Zephyr 550 | Yamaha Seca II |
|---|---|---|
| Seat height | 770 mm | 770 mm |
| Wheelbase | 1,435 mm | 1,450 mm |
| Wet weight | 206 kg | - |
| Displacement | 553 cc | 599 cc |
Posture metrics
Knee angle
- Kawasaki Zephyr 550
- Sport (58.0 deg)
- Yamaha Seca II
- Sport (58.1 deg)
Hip angle
- Kawasaki Zephyr 550
- Neutral (94.3 deg)
- Yamaha Seca II
- Neutral (94.0 deg)
Elbow angle
- Kawasaki Zephyr 550
- Relaxed (143.3 deg)
- Yamaha Seca II
- Relaxed (143.3 deg)
Torso lean
- Kawasaki Zephyr 550
- Neutral (11.8 deg)
- Yamaha Seca II
- Neutral (12.0 deg)