| 摘要 |
A two-wheeled motor vehicle includes a seat frame supporting a seat. A metal collar incorporated in the seat frame has a cylindrical shape and is covered by a resin member. The seat frame is fastened at its lower and upper fastening portions to a vehicle body frame of the motor vehicle. The seat frame has a degradation indicating part for indicating degradation of the seat frame when the resin member located at an inner diameter side of the metal collar deforms under a predetermined load to allow the upper fastening portions on the lower fastening portions. |
