Patent ID: 8079642

Claim:
A seat frame for a motorcycle comprising: a pair of frame parts; and a linking member arranged to link the pair of frame parts to each other; wherein the pair of frame parts and the linking member are integrally formed; each of the pair of frame parts is a magnesium alloy frame part; and the magnesium alloy frame part includes: a seat mounting section arranged to mount a seat mounted thereon, the seat mounting section extending along a vehicle length direction; a first side wall section extending from the seat mounting section; a second side wall section extending from the seat mounting section and being located on an outer side, along a vehicle width direction, of the first side wall section; and a plurality of protrusions provided at least one of a boundary between the seat mounting section and the first side wall section and a boundary between the seat mounting section and the second side wall section; wherein the seat mounting section has a thickness greater than at least one of a thickness of the first side wall section and a thickness of the second side wall section; each of the pair of frame parts includes a gate portion; and the gate portion is provided at an outer side surface, along the vehicle width direction, of the seat mounting section of each of the pair of frame parts.