motocross / default rider 183 cm
Kawasaki KX450F vs Yamaha YZ450F ergonomics
Kawasaki KX450F and Yamaha YZ450F 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
Kawasaki KX450F
All contacts reached
Yamaha YZ450F
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 Kawasaki KX450F lists a 965 mm seat; the Yamaha YZ450F lists 965 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 | Kawasaki KX450F | Yamaha YZ450F |
|---|---|---|
| Seat height | 965 mm | 965 mm |
| Wheelbase | 1,486 mm | 1,475 mm |
| Wet weight | - | 110 kg |
| Displacement | 449 cc | 450 cc |
Posture metrics
Knee angle
- Kawasaki KX450F
- Sport (58.1 deg)
- Yamaha YZ450F
- Sport (58.1 deg)
Hip angle
- Kawasaki KX450F
- Neutral (93.2 deg)
- Yamaha YZ450F
- Neutral (93.5 deg)
Elbow angle
- Kawasaki KX450F
- Relaxed (143.3 deg)
- Yamaha YZ450F
- Relaxed (143.3 deg)
Torso lean
- Kawasaki KX450F
- Neutral (12.5 deg)
- Yamaha YZ450F
- Neutral (12.4 deg)