motocross / default rider 183 cm
CZ 400 MX Type 981 vs Yamaha YZ80 ergonomics
CZ 400 MX Type 981 and Yamaha YZ80 land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.
Fit verdict
CZ 400 MX Type 981
All contacts reached
Yamaha YZ80
All contacts reached
The two bikes are close enough that posture preference matters more than the overall score.
Rider fit: reaching the ground
The CZ 400 MX Type 981 has a 836 mm seat; the Yamaha YZ80 sits at 800 mm — a 36 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 84 cm for the CZ 400 MX Type 981 and 80 cm for the Yamaha YZ80.
That makes the Yamaha YZ80 the easier reach to the ground — the safer pick for shorter riders or anyone who wants both feet planted at a stop — while the CZ 400 MX Type 981 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 | CZ 400 MX Type 981 | Yamaha YZ80 |
|---|---|---|
| Seat height | 836 mm | 800 mm |
| Wheelbase | 1,390 mm | 1,235 mm |
| Wet weight | - | - |
| Displacement | 400 cc | 83 cc |
Posture metrics
Knee angle
- CZ 400 MX Type 981
- Sport (57.9 deg)
- Yamaha YZ80
- Sport (57.6 deg)
Hip angle
- CZ 400 MX Type 981
- Neutral (95.4 deg)
- Yamaha YZ80
- Neutral (98.8 deg)
Elbow angle
- CZ 400 MX Type 981
- Relaxed (143.3 deg)
- Yamaha YZ80
- Relaxed (143.3 deg)
Torso lean
- CZ 400 MX Type 981
- Neutral (11.1 deg)
- Yamaha YZ80
- Neutral (8.8 deg)