naked / default rider 183 cm
Yamaha FZ-09 vs Yamaha FZ8 ergonomics
Yamaha FZ-09 and Yamaha FZ8 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 FZ-09
All contacts reached
Yamaha FZ8
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 FZ-09 lists a 815 mm seat; the Yamaha FZ8 lists 815 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 FZ-09 | Yamaha FZ8 |
|---|---|---|
| Seat height | 815 mm | 815 mm |
| Wheelbase | 1,440 mm | 1,460 mm |
| Wet weight | 188 kg | 211 kg |
| Displacement | 847 cc | 779 cc |
Posture metrics
Knee angle
- Yamaha FZ-09
- Sport (61.7 deg)
- Yamaha FZ8
- Sport (61.8 deg)
Hip angle
- Yamaha FZ-09
- Neutral (91.7 deg)
- Yamaha FZ8
- Neutral (91.2 deg)
Elbow angle
- Yamaha FZ-09
- Relaxed (143.3 deg)
- Yamaha FZ8
- Relaxed (143.3 deg)
Torso lean
- Yamaha FZ-09
- Neutral (12.7 deg)
- Yamaha FZ8
- Neutral (13.1 deg)