Honda Motor Co., Ltd.
Tank cap structure and saddle-type vehicle

Abstract:

A tank cap structure of an embodiment includes a cap body, a grip portion, a valve device, and a ratchet mechanism. The valve device includes a valve case which has a cylindrical shape about a screw axis and accommodates a float, and a valve body which has a tapered shape thinner than the valve case and extends toward an opening. The cap body includes a cylindrical receiving portion which has a cylindrical shape about the screw axis. A seal-receiving portion receiving a seal member held between the cap body and an oil filler port portion is provided on an outer circumferential surface of the cylindrical receiving portion. A valve-receiving portion receiving the valve device inserted into an inner circumference of the cylindrical receiving portion is provided on an inner circumferential surface of the cylindrical receiving portion.