Head race bearings ???

[rollo22]

Does anyone know the bearing size for S4RS on an 07 plate.
Ducati want £35 a bearing and not even taper bearings.

[chris yeatman]

the new bearings i have to do my s4r, says... japan oy ntn 8f07a17px1 plan to do them soon. from moto rapido
54.96 outer di
34.90 inner di
or there abouts

[Capo]

Skf 639174 germany-s w25 t

[Dukedesmo]

Skf 639174 germany-s w25 t

Same as an old Monster, at least that's the number on mine that I've just replaced.

Around £18 each from Wemoto.