A saddled vehicle includes an air cleaner and a vehicle body movement sensor. The air cleaner takes travel wind in an air cleaner box to purify air of the travel wind and supplies the purified air to an internal combustion engine. The vehicle body movement sensor is received in a recess and measures movement of a vehicle body. The recess is defined by a flat surface that crosses a rear wall of the air cleaner box. This provides a saddled vehicle including a vehicle body movement sensor that is disposed without reducing the volume of an air cleaner box.

A saddle-riding type vehicle includes a driver's seat on which an occupant taking a driving posture sits, a fuel tank disposed in front of the driver's seat and extending in a front-rear direction and a canister formed into a long-length shape that defines a longitudinal direction of the canister, fuel vapors generated in the fuel tank being brought into the canister and adsorbed and held by an adsorbent provided in the canister. The canister is disposed under the fuel tank with the longitudinal direction aligned with the front-rear direction and is entirely covered by the fuel tank in vehicle side view.

A saddle-riding type vehicle includes a driver's seat on which an occupant taking a driving posture sits, a fuel tank disposed in front of the driver's seat and extending in a front-rear direction and a canister formed into a long-length shape that defines a longitudinal direction of the canister, fuel vapors generated in the fuel tank being brought into the canister and adsorbed and held by an adsorbent provided in the canister. The canister is disposed under the fuel tank with the longitudinal direction aligned with the front-rear direction and is entirely covered by the fuel tank in vehicle side view.

An off-road vehicle includes a frame and an engine. The engine includes a cylinder block and a cylinder head, on which an exhaust passage is arranged. The cylinder head is provided with a supplementary air supply passage for mixing air into the exhaust gas discharged from the combustion chamber. Alternatively, the supplementary air supply passage can be included in the exhaust system, such as in a cylinder head mounting flange of the exhaust pipe, upstream of an oxygen sensor and first and second stage catalytic converters. The exhaust gas from the engine is further oxidized by air, which reduces the content of components such as CO and NOx in the exhaust gas, improving environmental protection.

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 fuel pump unit cover that covers a part of a fuel pump unit exposed to the outside of a fuel tank includes opening holes, and is provided as an elastically deformable member. The opening area of the opening holes is smaller than the sum of the cross-sectional areas of components (fuel pipe and wiring harness) passing through the opening holes.

A fuel pump unit cover that covers a part of a fuel pump unit exposed to the outside of a fuel tank includes opening holes, and is provided as an elastically deformable member. The opening area of the opening holes is smaller than the sum of the cross-sectional areas of components (fuel pipe and wiring harness) passing through the opening holes.

A fuel supply structure for a saddled vehicle, includes: an upstream-side fuel supply system guiding fuel from a fuel tank to a fuel pump side; a downstream-side fuel supply system guiding the fuel from the pump to a fuel injection valve side; and an excess fuel return system returning excess fuel from the downstream-side fuel supply system to the tank side. A fuel hose joint is attached to the tank and includes: an insertion tube portion inserted into the tank and formed into a dual tube structure where an inner tube is covered by an outer tube; a first connection tube portion communicating with inside of the inner tube; and a second connection tube portion communicating with inside of the outer tube. A fuel suction hose is connected to one of the first and second connection tube portions, and a fuel return hose is connected to an other thereof.

A fuel supply structure for a saddled vehicle, includes: an upstream-side fuel supply system guiding fuel from a fuel tank to a fuel pump side; a downstream-side fuel supply system guiding the fuel from the pump to a fuel injection valve side; and an excess fuel return system returning excess fuel from the downstream-side fuel supply system to the tank side. A fuel hose joint is attached to the tank and includes: an insertion tube portion inserted into the tank and formed into a dual tube structure where an inner tube is covered by an outer tube; a first connection tube portion communicating with inside of the inner tube; and a second connection tube portion communicating with inside of the outer tube. A fuel suction hose is connected to one of the first and second connection tube portions, and a fuel return hose is connected to an other thereof.

A vehicle is provided. The vehicle includes: a frame; a seat arranged on the frame; a powertrain arranged on the frame; a steering system arranged on the frame, and including a steering shaft, the steering shaft being located in front of the powertrain; and a fuel tank located behind the steering shaft and in front of the powertrain.