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supermoto / default rider 183 cm

Aprilia SX 125 vs Yamaha XT 660 R Supermotard ergonomics

Aprilia SX 125 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

Aprilia SX 125

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.

Geometry snapshot

Geometry comparison for Aprilia SX 125 and Yamaha XT 660 R Supermotard
SpecAprilia SX 125Yamaha XT 660 R Supermotard
Seat height880 mm875 mm
Wheelbase1,425 mm1,490 mm
Wet weight136 kg-
Displacement124 cc660 cc

Posture metrics

Knee angle

Aprilia SX 125
Sport (58.0 deg)
Yamaha XT 660 R Supermotard
Sport (58.1 deg)

Hip angle

Aprilia SX 125
Neutral (94.6 deg)
Yamaha XT 660 R Supermotard
Neutral (93.2 deg)

Elbow angle

Aprilia SX 125
Relaxed (143.3 deg)
Yamaha XT 660 R Supermotard
Relaxed (143.3 deg)

Torso lean

Aprilia SX 125
Neutral (11.7 deg)
Yamaha XT 660 R Supermotard
Neutral (12.6 deg)