A saddle-ride type vehicle includes an air-cooled fuel cell unit that is mounted on a body frame behind a head pipe and in front of a pivot frame and uses taken-in outside air for supplying oxygen and cooling a unit. The fuel cell unit includes an outside air intake open forward below the head pipe and an exhaust port open rearward above a pivot. A seat frame has a monocoque structure also having a configuration of an exhaust duct for guiding exhaust gas from the fuel cell unit to a back of an occupant's seat. Accordingly, in the saddle-ride type vehicle, it is possible to realize more efficient ventilation in utilizing a fuel cell.

A saddle-ride type vehicle includes a vehicle body frame steerably supporting a front fork by a head pipe and swingably supporting a rear wheel unit around a pivot, an air-cooled type fuel cell unit supported by the vehicle body frame on a rear side of the head pipe and including an outside air intake port facing forward, and a vehicle body cover defining a front of an intake air space that is connected to the intake port. The vehicle body cover includes a traveling air passage changing a direction of traveling air that flows in from a front. Accordingly, it is possible to efficiently supply traveling air to a fuel cell unit that includes a fuel cell.

A motorcycle comprises a vehicle body frame including: a head pipe; a pair of main frames extending rearward from the head pipe to be apart from each other in a vehicle width direction; a cross member extending in the vehicle width direction and connecting rear end portions of the pair of main frames; and a pair of rear frames extending rearward from the cross member; and an engine connected to the pair of main frames, each of the pair of main frames includes a trellis section, and a single pipe section extending rearward from the trellis section and having a rear end joined to the cross member, the trellis section is provided with a first mount to which a front portion of a cylinder head is connected, and the single pipe section is provided with a second mount to which a rear portion of the cylinder head is connected.

An abnormality detection device determines abnormality in an exhaust gas sensor, disposed in an exhaust passage of an engine to detect a component in exhaust gas. The abnormality detection device includes: a responsiveness determination unit configured to calculate responsiveness of the exhaust gas sensor on the basis of a timewise change of output values of the exhaust gas sensor; and an abnormality determination unit configured to determine that the exhaust gas sensor has abnormality when the responsiveness calculated by the responsiveness determination unit is lower than a predetermined responsiveness threshold. The abnormality determination unit determines if the exhaust gas sensor has abnormality, excluding an excluded period during which a slope of the output values becomes zero or is inversed with respect to a preceding trend of the timewise change while the output values of the exhaust gas sensor timewisely change between a predetermined first and second determination values.

An electric motorcycle includes a transmission gear set mounted in a gearbox housing and having a power input shaft inserted through a middle block of the gearbox and a power input pulley mounted on the power input shaft, an electric motor mounted on one side of the middle block and having a motor pulley mounted on the motor shaft thereof, and a transmission belt coupled between the motor pulley and the power input pulley for enabling the electric motor to rotate the power input shaft of the transmission gear set through the transmission belt, a gear shift pedal and a gear shift axle for gear shifting, and a speed output chain gear mounted on an output shaft of the transmission gear set and driven by the output shaft to rotate the rear wheel of the electric motorcycle through a chain.

An electric motorcycle includes a transmission gear set mounted in a gearbox housing and having a power input shaft inserted through a middle block of the gearbox and a power input pulley mounted on the power input shaft, an electric motor mounted on one side of the middle block and having a motor pulley mounted on the motor shaft thereof, and a transmission belt coupled between the motor pulley and the power input pulley for enabling the electric motor to rotate the power input shaft of the transmission gear set through the transmission belt, a gear shift pedal and a gear shift axle for gear shifting, and a speed output chain gear mounted on an output shaft of the transmission gear set and driven by the output shaft to rotate the rear wheel of the electric motorcycle through a chain.

There is provided a saddle-ridden type vehicle. The vehicle includes frame members, pivot shaft supports, a swing arm, first and second support members, a rear cushion unit and a link mechanism. A first link member has one end portion pivotably connected to a rear end portion of the rear cushion unit, the other end portion located at a front lower side relative to the rear end portion and extending to a position at a rear side relative to a rear end portion of each frame member, and a swing arm connection unit. A second link member has one end portion pivotably connected to the other end portion of the first link member and the other end portion pivotably connected to the second support member. A cushion unit connection portion of the swing arm is pivotably connected to a swing arm connection portion of the first link member.

A straddled vehicle, including a frame structure, a rear arm, a driving wheel rotatably supported by the rear arm, a power source unit, and a drive unit including a gear box, a drive motor and a control unit. The drive motor is arranged with an off-set toward a first direction from a center of the straddled vehicle, without overlapping the power source unit in a side view. The control unit is further in a second direction than the drive motor, and overlaps the drive motor, but does not overlap the power source unit, in the side view. The gear box is further in the second direction than the drive motor, and overlaps the drive motor in the side view. The gear box is also further in the first direction than the control unit, and overlaps with the control unit, but does not overlap the power source unit, in the side view.

A straddled vehicle, including a frame structure, a rear arm, a driving wheel rotatably supported by the rear arm, a power source unit, and a drive unit including a gear box, a drive motor and a control unit. The drive motor is arranged with an off-set toward a first direction from a center of the straddled vehicle, without overlapping the power source unit in a side view. The control unit is further in a second direction than the drive motor, and overlaps the drive motor, but does not overlap the power source unit, in the side view. The gear box is further in the second direction than the drive motor, and overlaps the drive motor in the side view. The gear box is also further in the first direction than the control unit, and overlaps with the control unit, but does not overlap the power source unit, in the side view.

An exhaust system of a saddle-ride type vehicle includes an exhaust pipe portion, a chamber portion, and a silencer. The exhaust pipe portion is coupled to an engine supported by a frame. The exhaust pipe portion is configured to guide exhaust air. The chamber portion is coupled to the exhaust pipe portion. A cross section of the chamber portion is formed larger than the exhaust pipe portion. The silencer is coupled to the chamber portion. The chamber portion includes: a main body portion disposed below the frame, and a fixing bracket projecting upward from the main body portion. The fixing bracket is secured to the frame. The frame and the fixing bracket have a fixed position. The fixed position is positioned above a lower end of the frame.