| 摘要 |
To provide a motorcycle disk brake that can ensure brake force and also enable miniaturization. A motorcycle disk brake unit 10 has a part 105 of a piston 56 which projects outwards from an outer edge 35 of a brake disk 33, and by forming parts 67, within an outer back plate 65 and an inner back plate 75, corresponding to the piston 56 following the piston 56 so that an outer pad 90 and an inner pad 95 do not project out further than the outer edge 35 of the brake disk 33, another part 68 following the outer edge 35 of the brake disk 33, and a bridge section 53 following respective back plates 65, 75, a part 54 of the bridge section 53 can project further inwards than the piston 56 resulting in miniaturization of disk brake unit 10.
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