Side cover structure

1 . A side cover structure forming a side surface of a straddle-type vehicle, the side cover structure comprising:

a main frame extending rearward from a head pipe;

a seat rail positioned behind the main frame; and

a side cover fixed to the seat rail from an inner side in a vehicle width direction,

wherein, below a driver seating surface of a seat on the seat rail, the side cover is exposed, to an outer side in the vehicle width direction, from an opening formed by rail members included in the seat rail, and

wherein a part of an upper edge of the side cover is expanded further upward than a height of the upper edge of an upper rail member of the seat rail to form an expansion portion.

2 . The side cover structure according to claim 1 ,

wherein, below the driver seating surface of the seat, the seat rail overlaps the expansion portion from the outer side in the vehicle width direction.

3 . The side cover structure according to claim 1 ,

wherein, below the driver seating surface of the seat, the expansion portion is positioned on the inner side in the vehicle width direction than a seat side edge, and the expansion portion is covered with the seat side edge from the outer side in the vehicle width direction.

4 . The side cover structure according to claim 1 ,

wherein an air cleaner is disposed on an inner side, in the vehicle width direction, of the seat rail,

wherein, below the driver seating surface of the seat, the expansion portion is positioned above an air intake port of the air cleaner, a front end of the expansion portion is positioned in front of the air intake port, and a rear end of the expansion portion is positioned behind the air intake port.

5 . The side cover structure according to claim 1 ,

wherein an exposed portion of the side cover bulges outward, to enter the opening, in the vehicle width direction to form a bulging portion, the exposed portion being exposed from the opening.

6 . The side cover structure according to claim 5 ,

wherein an air cleaner is disposed on an inner side, in the vehicle width direction, of the seat rail, and

wherein an air intake port of the air cleaner is positioned on an inner side, in the vehicle width direction, of the bulging portion.

7 . The side cover structure according to claim 1 ,

wherein the side cover is a pair of side covers separated to the left and right.

8 . The side cover structure according to claim 1 ,

wherein a holding portion of a wire member is formed on an inner surface of the side cover.

9 . The side cover structure according to claim 1 ,

wherein the rail members include an upper rail member, a lower rail member, and connecting rail members that connect the upper rail member and the lower rail member,

wherein the seat rail is formed with an opening defined by the upper rail member, the lower rail member, and the connecting rail members,

wherein the side cover is exposed to the outer side in the vehicle width direction through the opening,

wherein the side cover extends in a vehicle front-rear direction along the upper rail member and the lower rail member,

wherein the side cover overlaps respective connecting rail members provided at a front and a rear of the side cover, and

wherein the side cover is fixed, from the inner side to the connecting rail members.

10 . The side cover structure according to claim 1 ,

wherein a front seat rail cover is attached to a front attachment portion of the side cover, and a rear seat rail cover is attached to a rear attachment portion of the side cover.

11 . The side cover structure according to claim 1 ,

wherein a rear fender is attached to lower edge of the side cover along the lower edge.