standard / default rider 183 cm
BMW R90/6 vs Kawasaki KZ650 B1 ergonomics
BMW R90/6 and Kawasaki KZ650 B1 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
BMW R90/6
95Comfortable
All contacts reached
Kawasaki KZ650 B1
95Comfortable
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The BMW R90/6 has a 810 mm seat; the Kawasaki KZ650 B1 sits at 810 mm, within a few millimetres of each other. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 81 cm for the BMW R90/6 and 81 cm for the Kawasaki KZ650 B1.
Geometry snapshot
| Spec | BMW R90/6 | Kawasaki KZ650 B1 |
|---|---|---|
| Seat height | 810 mm | 810 mm |
| Wheelbase | 1,465 mm | 1,420 mm |
| Wet weight | 209 kg | - |
| Displacement | 898 cc | 652 cc |
Posture metrics
Knee angle
- BMW R90/6
- Sport (58.1 deg)
- Kawasaki KZ650 B1
- Sport (58.0 deg)
Hip angle
- BMW R90/6
- Neutral (95.4 deg)
- Kawasaki KZ650 B1
- Neutral (94.7 deg)
Elbow angle
- BMW R90/6
- Relaxed (143.3 deg)
- Kawasaki KZ650 B1
- Relaxed (143.3 deg)
Torso lean
- BMW R90/6
- Neutral (10.6 deg)
- Kawasaki KZ650 B1
- Neutral (11.6 deg)