cafe-racer / default rider 183 cm
Sinnis Bomber 125 vs Yamaha SRX400 ergonomics
Sinnis Bomber 125 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
Sinnis Bomber 125
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 Sinnis Bomber 125 lists a 760 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 | Sinnis Bomber 125 | Yamaha SRX400 |
|---|---|---|
| Seat height | 760 mm | 760 mm |
| Wheelbase | 1,360 mm | 1,390 mm |
| Wet weight | 124 kg | 168 kg |
| Displacement | 125 cc | 399 cc |
Posture metrics
Knee angle
- Sinnis Bomber 125
- Sport (57.9 deg)
- Yamaha SRX400
- Sport (57.9 deg)
Hip angle
- Sinnis Bomber 125
- Neutral (95.9 deg)
- Yamaha SRX400
- Neutral (95.4 deg)
Elbow angle
- Sinnis Bomber 125
- Relaxed (143.3 deg)
- Yamaha SRX400
- Relaxed (143.3 deg)
Torso lean
- Sinnis Bomber 125
- Neutral (10.7 deg)
- Yamaha SRX400
- Neutral (11.1 deg)