motocross / default rider 183 cm
GasGas MC 65 vs Yamaha YZ80 ergonomics
GasGas MC 65 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
GasGas MC 65
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 GasGas MC 65 has a 730 mm seat; the Yamaha YZ80 sits at 800 mm — a 70 mm difference. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 73 cm for the GasGas MC 65 and 80 cm for the Yamaha YZ80.
That makes the GasGas MC 65 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 YZ80 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 | GasGas MC 65 | Yamaha YZ80 |
|---|---|---|
| Seat height | 730 mm | 800 mm |
| Wheelbase | 1,142 mm | 1,235 mm |
| Wet weight | - | - |
| Displacement | 65 cc | 83 cc |
Posture metrics
Knee angle
- GasGas MC 65
- Sport (57.4 deg)
- Yamaha YZ80
- Sport (57.6 deg)
Hip angle
- GasGas MC 65
- Neutral (100.9 deg)
- Yamaha YZ80
- Neutral (98.8 deg)
Elbow angle
- GasGas MC 65
- Relaxed (143.3 deg)
- Yamaha YZ80
- Relaxed (143.3 deg)
Torso lean
- GasGas MC 65
- Neutral (7.4 deg)
- Yamaha YZ80
- Neutral (8.8 deg)