standard / default rider 183 cm
BMW F650CS vs BSA Motorcycles Gold Star 650 ergonomics
BMW F650CS and BSA Motorcycles Gold Star 650 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 F650CS
All contacts reached
BSA Motorcycles Gold Star 650
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 F650CS lists a 780 mm seat; the BSA Motorcycles Gold Star 650 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 | BMW F650CS | BSA Motorcycles Gold Star 650 |
|---|---|---|
| Seat height | 780 mm | 780 mm |
| Wheelbase | 1,493 mm | 1,425 mm |
| Wet weight | 189 kg | 213 kg |
| Displacement | 652 cc | 652 cc |
Posture metrics
Knee angle
- BMW F650CS
- Sport (58.1 deg)
- BSA Motorcycles Gold Star 650
- Sport (58.0 deg)
Hip angle
- BMW F650CS
- Neutral (93.1 deg)
- BSA Motorcycles Gold Star 650
- Neutral (94.6 deg)
Elbow angle
- BMW F650CS
- Relaxed (143.3 deg)
- BSA Motorcycles Gold Star 650
- Relaxed (143.3 deg)
Torso lean
- BMW F650CS
- Neutral (12.7 deg)
- BSA Motorcycles Gold Star 650
- Neutral (11.7 deg)