naked / default rider 183 cm
BMW F 900 R vs Yamaha FZ-09 ergonomics
BMW F 900 R and Yamaha FZ-09 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
BMW F 900 R
All contacts reached
Yamaha FZ-09
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 BMW F 900 R lists a 815 mm seat; the Yamaha FZ-09 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 | BMW F 900 R | Yamaha FZ-09 |
|---|---|---|
| Seat height | 815 mm | 815 mm |
| Wheelbase | 1,518 mm | 1,440 mm |
| Wet weight | 211 kg | 188 kg |
| Displacement | 895 cc | 847 cc |
Posture metrics
Knee angle
- BMW F 900 R
- Sport (62.0 deg)
- Yamaha FZ-09
- Sport (61.7 deg)
Hip angle
- BMW F 900 R
- Neutral (89.9 deg)
- Yamaha FZ-09
- Neutral (91.7 deg)
Elbow angle
- BMW F 900 R
- Relaxed (143.3 deg)
- Yamaha FZ-09
- Relaxed (143.3 deg)
Torso lean
- BMW F 900 R
- Neutral (14.0 deg)
- Yamaha FZ-09
- Neutral (12.7 deg)