motocross / default rider 183 cm
Kawasaki KX100 vs Yamaha YZ85LW ergonomics
Kawasaki KX100 and Yamaha YZ85LW land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
Kawasaki KX100
All contacts reached
Yamaha YZ85LW
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The Kawasaki KX100 has a 871 mm seat; the Yamaha YZ85LW sits at 884 mm — a 13 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 87 cm for the Kawasaki KX100 and 88 cm for the Yamaha YZ85LW.
That makes the Kawasaki KX100 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the Yamaha YZ85LW gives taller riders more legroom and a more open knee bend. Load your own height and inseam into the simulator to see exactly how each one fits you.
Geometry snapshot
| Spec | Kawasaki KX100 | Yamaha YZ85LW |
|---|---|---|
| Seat height | 871 mm | 884 mm |
| Wheelbase | 1,311 mm | 1,285 mm |
| Wet weight | 77 kg | 75 kg |
| Displacement | 99 cc | 85 cc |
Posture metrics
Knee angle
- Kawasaki KX100
- Sport (57.7 deg)
- Yamaha YZ85LW
- Sport (57.7 deg)
Hip angle
- Kawasaki KX100
- Neutral (97.2 deg)
- Yamaha YZ85LW
- Neutral (97.6 deg)
Elbow angle
- Kawasaki KX100
- Relaxed (143.3 deg)
- Yamaha YZ85LW
- Relaxed (143.3 deg)
Torso lean
- Kawasaki KX100
- Neutral (9.9 deg)
- Yamaha YZ85LW
- Neutral (9.6 deg)