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Rider Height
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motocross / default rider 183 cm

Fantic XXF 450 vs Yamaha YZ450F ergonomics

Fantic XXF 450 and Yamaha YZ450F have modeled posture scores within three points for the 183 cm default rider. Treat this as a planning estimate; posture preference, data confidence, and a real test sit still matter.

Modeled fit comparison

Fantic XXF 450

Modeled scoreProvisional
95Comfortable

All contacts reached

Yamaha YZ450F

Modeled scoreProvisional
95Comfortable

All contacts reached

The modeled scores are within three points, so the result does not distinguish a higher-scoring bike. Treat the result as a planning estimate and compare each bike's geometry confidence before a real test sit.

Rider fit: reaching the ground

The Fantic XXF 450 lists a 965 mm seat; the Yamaha YZ450F lists 965 mm, within a few millimetres of each other. Seat height is only a first-pass ground-reach input. It does not establish safety or actual foot contact. Seat width, suspension sag, boots, mobility, load, and individual proportions can materially change the result.

Geometry snapshot

Geometry comparison for Fantic XXF 450 and Yamaha YZ450F
SpecFantic XXF 450Yamaha YZ450F
Seat height965 mm965 mm
Wheelbase1,480 mm1,475 mm
Wet weight104 kg110 kg
Displacement450 cc450 cc

Posture metrics

Knee angle

Fantic XXF 450
Sport (58.1 deg)
Yamaha YZ450F
Sport (58.1 deg)

Hip angle

Fantic XXF 450
Neutral (93.3 deg)
Yamaha YZ450F
Neutral (93.5 deg)

Elbow angle

Fantic XXF 450
Relaxed (143.3 deg)
Yamaha YZ450F
Relaxed (143.3 deg)

Torso lean

Fantic XXF 450
Neutral (12.5 deg)
Yamaha YZ450F
Neutral (12.4 deg)