cafe-racer / default rider 183 cm
BSA Motorcycles Gold Star 650 vs Kawasaki Zephyr 750 ergonomics
BSA Motorcycles Gold Star 650 and Kawasaki Zephyr 750 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
BSA Motorcycles Gold Star 650
All contacts reached
Kawasaki Zephyr 750
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 BSA Motorcycles Gold Star 650 lists a 780 mm seat; the Kawasaki Zephyr 750 lists 780 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 | BSA Motorcycles Gold Star 650 | Kawasaki Zephyr 750 |
|---|---|---|
| Seat height | 780 mm | 780 mm |
| Wheelbase | 1,425 mm | 1,450 mm |
| Wet weight | 213 kg | - |
| Displacement | 652 cc | 738 cc |
Posture metrics
Knee angle
- BSA Motorcycles Gold Star 650
- Sport (58.0 deg)
- Kawasaki Zephyr 750
- Sport (58.1 deg)
Hip angle
- BSA Motorcycles Gold Star 650
- Neutral (94.6 deg)
- Kawasaki Zephyr 750
- Neutral (94.0 deg)
Elbow angle
- BSA Motorcycles Gold Star 650
- Relaxed (143.3 deg)
- Kawasaki Zephyr 750
- Relaxed (143.3 deg)
Torso lean
- BSA Motorcycles Gold Star 650
- Neutral (11.7 deg)
- Kawasaki Zephyr 750
- Neutral (12.0 deg)