cafe-racer / default rider 183 cm
BSA Motorcycles A10 Rocket Gold Star vs Yamaha SRX400 ergonomics
BSA Motorcycles A10 Rocket Gold Star and Yamaha SRX400 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 A10 Rocket Gold Star
All contacts reached
Yamaha SRX400
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 A10 Rocket Gold Star lists a 762 mm seat; the Yamaha SRX400 lists 760 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 A10 Rocket Gold Star | Yamaha SRX400 |
|---|---|---|
| Seat height | 762 mm | 760 mm |
| Wheelbase | 1,422 mm | 1,390 mm |
| Wet weight | - | 168 kg |
| Displacement | 646 cc | 399 cc |
Posture metrics
Knee angle
- BSA Motorcycles A10 Rocket Gold Star
- Sport (58.0 deg)
- Yamaha SRX400
- Sport (57.9 deg)
Hip angle
- BSA Motorcycles A10 Rocket Gold Star
- Neutral (94.6 deg)
- Yamaha SRX400
- Neutral (95.4 deg)
Elbow angle
- BSA Motorcycles A10 Rocket Gold Star
- Relaxed (143.3 deg)
- Yamaha SRX400
- Relaxed (143.3 deg)
Torso lean
- BSA Motorcycles A10 Rocket Gold Star
- Neutral (11.7 deg)
- Yamaha SRX400
- Neutral (11.1 deg)