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supermoto / default rider 183 cm

Honda FMX650 vs Yamaha XT 660 R Supermotard ergonomics

Honda FMX650 and Yamaha XT 660 R Supermotard land within a few ergonomic points for the default rider, so the better choice comes down to posture preference and bike category.

Fit verdict

Honda FMX650

95Comfortable

All contacts reached

Yamaha XT 660 R Supermotard

95Comfortable

All contacts reached

The two bikes are close enough that posture preference matters more than the overall score.

Rider fit: reaching the ground

The Honda FMX650 has a 875 mm seat; the Yamaha XT 660 R Supermotard sits at 875 mm, within a few millimetres of each other. As a rule of thumb you flat-foot a bike when your inseam roughly matches its seat height: about 88 cm for the Honda FMX650 and 88 cm for the Yamaha XT 660 R Supermotard.

Geometry snapshot

Geometry comparison for Honda FMX650 and Yamaha XT 660 R Supermotard
SpecHonda FMX650Yamaha XT 660 R Supermotard
Seat height875 mm875 mm
Wheelbase1,490 mm1,490 mm
Wet weight170 kg-
Displacement644 cc660 cc

Posture metrics

Knee angle

Honda FMX650
Sport (58.1 deg)
Yamaha XT 660 R Supermotard
Sport (58.1 deg)

Hip angle

Honda FMX650
Neutral (93.2 deg)
Yamaha XT 660 R Supermotard
Neutral (93.2 deg)

Elbow angle

Honda FMX650
Relaxed (143.3 deg)
Yamaha XT 660 R Supermotard
Relaxed (143.3 deg)

Torso lean

Honda FMX650
Neutral (12.6 deg)
Yamaha XT 660 R Supermotard
Neutral (12.6 deg)