motocross / default rider 183 cm
KTM 65 SX vs Yamaha YZ80 ergonomics
KTM 65 SX 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
KTM 65 SX
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 KTM 65 SX 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 KTM 65 SX and 80 cm for the Yamaha YZ80.
That makes the KTM 65 SX 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 | KTM 65 SX | 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
- KTM 65 SX
- Sport (57.4 deg)
- Yamaha YZ80
- Sport (57.6 deg)
Hip angle
- KTM 65 SX
- Neutral (100.9 deg)
- Yamaha YZ80
- Neutral (98.8 deg)
Elbow angle
- KTM 65 SX
- Relaxed (143.3 deg)
- Yamaha YZ80
- Relaxed (143.3 deg)
Torso lean
- KTM 65 SX
- Neutral (7.4 deg)
- Yamaha YZ80
- Neutral (8.8 deg)