moped / default rider 183 cm
Suzuki Birdie 50 vs Yamaha QT50 Yamahopper ergonomics
Suzuki Birdie 50 and Yamaha QT50 Yamahopper 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
Suzuki Birdie 50
All contacts reached
Yamaha QT50 Yamahopper
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 Suzuki Birdie 50 lists a 705 mm seat; the Yamaha QT50 Yamahopper lists 695 mm — a 10 mm difference. 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.
On seat height alone, the Yamaha QT50 Yamahopper has the easier modeled ground reach. Load your measurements into the simulator to compare the model, then verify both motorcycles in person.
Geometry snapshot
| Spec | Suzuki Birdie 50 | Yamaha QT50 Yamahopper |
|---|---|---|
| Seat height | 705 mm | 695 mm |
| Wheelbase | 1,175 mm | 1,050 mm |
| Wet weight | - | - |
| Displacement | 49 cc | 49 cc |
Posture metrics
Knee angle
- Suzuki Birdie 50
- Sport (57.5 deg)
- Yamaha QT50 Yamahopper
- Sport (57.3 deg)
Hip angle
- Suzuki Birdie 50
- Neutral (100.3 deg)
- Yamaha QT50 Yamahopper
- Neutral (103.1 deg)
Elbow angle
- Suzuki Birdie 50
- Relaxed (143.3 deg)
- Yamaha QT50 Yamahopper
- Relaxed (143.3 deg)
Torso lean
- Suzuki Birdie 50
- Neutral (7.9 deg)
- Yamaha QT50 Yamahopper
- Neutral (5.9 deg)