cafe-racer / default rider 183 cm
Mutt Motorcycles Mongrel 125 vs Yamaha XS650 SE ergonomics
Mutt Motorcycles Mongrel 125 and Yamaha XS650 SE 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
Mutt Motorcycles Mongrel 125
All contacts reached
Yamaha XS650 SE
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 Mutt Motorcycles Mongrel 125 lists a 790 mm seat; the Yamaha XS650 SE lists 790 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 | Mutt Motorcycles Mongrel 125 | Yamaha XS650 SE |
|---|---|---|
| Seat height | 790 mm | 790 mm |
| Wheelbase | 1,295 mm | 1,435 mm |
| Wet weight | 135 kg | - |
| Displacement | 125 cc | 653 cc |
Posture metrics
Knee angle
- Mutt Motorcycles Mongrel 125
- Sport (57.7 deg)
- Yamaha XS650 SE
- Sport (58.0 deg)
Hip angle
- Mutt Motorcycles Mongrel 125
- Neutral (97.5 deg)
- Yamaha XS650 SE
- Neutral (94.3 deg)
Elbow angle
- Mutt Motorcycles Mongrel 125
- Relaxed (143.3 deg)
- Yamaha XS650 SE
- Relaxed (143.3 deg)
Torso lean
- Mutt Motorcycles Mongrel 125
- Neutral (9.7 deg)
- Yamaha XS650 SE
- Neutral (11.8 deg)