A fuel tank cap includes: a cap body which opens and closes a fuel supply port of a fuel tank; a ring member which is disposed around the fuel supply port and is shaped so as to surround the cap body; and a hinge member which is coupled to the ring member to support the cap body in a turnable manner between a closed position and an open position. A first peripheral part of the ring member, which is opposed to an outer periphery of the cap body, has a larger dimension in a circumferential direction than a dimension of a second peripheral part of the hinge member, which is opposed to the outer periphery of the cap body. The ring member and the hinge member are made of mutually different materials.

A fuel tank cap includes: a cap body which opens and closes a fuel supply port of a fuel tank; a ring member which is disposed around the fuel supply port and is shaped so as to surround the cap body; and a hinge member which is coupled to the ring member to support the cap body in a turnable manner between a closed position and an open position. A first peripheral part of the ring member, which is opposed to an outer periphery of the cap body, has a larger dimension in a circumferential direction than a dimension of a second peripheral part of the hinge member, which is opposed to the outer periphery of the cap body. The ring member and the hinge member are made of mutually different materials.

A resin tank and a method for manufacturing a resin tank in which positional deviation and deformation of an inserted member is prevented. In a resin tank formed through resin injection molding, a gradually changing thickness portion in which a thickness of a resin layer gradually changes from one side to the other side with respect to a surface of an insert plate for attachment of an auxiliary component is formed in the resin layer at a region into which the insert plate is inserted.

A two-wheeled vehicle includes a frame assembly having a front end and a rear end extending along a longitudinally-extending centerline, a front ground-engaging member operably coupled to the front end of the frame assembly at a front rotational axis, and a rear ground-engaging member operably coupled to the rear end of the frame assembly at a rear rotational axis. A wheel base is defined between the front and rear rotational axes and a vertically-extending centerline of the vehicle extends vertically at the midpoint of the wheel base and is perpendicular to the longitudinally-extending centerline. The vehicle also includes a fuel tank, an airbox assembly, and a battery all positioned relative to the vertically-extending centerline of the vehicle.

A two-wheeled vehicle includes a frame assembly having a front end and a rear end extending along a longitudinally-extending centerline, a front ground-engaging member operably coupled to the front end of the frame assembly at a front rotational axis, and a rear ground-engaging member operably coupled to the rear end of the frame assembly at a rear rotational axis. A wheel base is defined between the front and rear rotational axes and a vertically-extending centerline of the vehicle extends vertically at the midpoint of the wheel base and is perpendicular to the longitudinally-extending centerline. The vehicle also includes a fuel tank, an airbox assembly, and a battery all positioned relative to the vertically-extending centerline of the vehicle.

A vehicle includes a frame, a seat, a storage box, an engine body at least partially overlapping with the seat when seen from above, an intake system component, a fuel system component, an evaporative emission system, a pressure sensor, and at least one of an electric vent valve or an electric suction pump. At least one of the pressure sensor, the vent valve, or the suction pump is supported by at least one of a frame, a storage box, an engine body, an intake system component, or a fuel system component.

A vehicle includes a frame, a seat, a storage box, an engine body at least partially overlapping with the seat when seen from above, an intake system component, a fuel system component, an evaporative emission system, a pressure sensor, and at least one of an electric vent valve or an electric suction pump. At least one of the pressure sensor, the vent valve, or the suction pump is supported by at least one of a frame, a storage box, an engine body, an intake system component, or a fuel system component.

A vehicle includes at least one of an electric vent valve configured to open and close an outside-air-introduction passage of a canister or an electric suction pump configured. to suck gas in a gas passage through which the gas flows. The canister and at least one of the vent valve or the suction pump are disposed such that at least one of a virtual-left-right-center plane that includes a center in a left-right direction and is perpendicular to the left-right direction, a virtual-front-rear-center plane that includes a center in a front-rear direction and is perpendicular to the front-rear direction, or a virtual-up-down-center plane that includes a center in an up-down direction and is perpendicular to the up-down direction is located between a gravity center of the canister and at least one of a gravity center of the vent valve or a gravity center of the suction pump.

A vehicle includes at least one of an electric vent valve configured to open and close an outside-air-introduction passage of a canister or an electric suction pump configured. to suck gas in a gas passage through which the gas flows. The canister and at least one of the vent valve or the suction pump are disposed such that at least one of a virtual-left-right-center plane that includes a center in a left-right direction and is perpendicular to the left-right direction, a virtual-front-rear-center plane that includes a center in a front-rear direction and is perpendicular to the front-rear direction, or a virtual-up-down-center plane that includes a center in an up-down direction and is perpendicular to the up-down direction is located between a gravity center of the canister and at least one of a gravity center of the vent valve or a gravity center of the suction pump.

A backsplash protector device for use with a fuel tank or a motorcycle gas tank to prevent fuel from jumping or splashing from the opening of the gas tank during a fuel filling operation, and a vapor tube lock device for application to a gas nozzle to hold the vapor tube of the gas nozzle in a retracted or compressed position to permit a greater portion of the nozzle to be inserted through the backsplash protector and into the fuel tank without obscuring or blocking the user's ability to visually monitor the fuel flow, the fuel level within the tank, and/or the relative position of the nozzle (and the nozzle end from which fuel flows) within the tank.