Abstract: A damper control device includes a pitching angular velocity detection unit that detects a pitching angular velocity of a vehicle body, a front wheel side pressure detection unit that detects a pressure of a compression side chamber in a front wheel side damper, and a rear wheel side pressure detection unit that detects a pressure of a compression side chamber in a rear wheel side damper. The damper control device controls the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper based on the pitching angular velocity, the pressure of the compression side chamber in the front wheel side damper and the pressure of the compression side chamber in the rear wheel side damper.

Abstract: There is provided a steering shaft modifier, capable of fundamentally preventing distortion generated in a new steering shaft, being easing aligned, and being simply assembled, including: a frame having a steering shaft penetrating portion formed in a front surface thereof and having a contact surface covering a portion of the steering head and disposed to be in contact with an upper bearing installation portion of a steering shaft installation portion; a shaft including a head portion caught by a lower bearing installation portion of the steering shaft installation portion of the steering head, a body portion passing through the steering shaft installation portion, and a connection portion connected to the frame; and a frame block including a lower contact surface tightly attached to a lower surface of the steering head in the rear of the lower bearing installation portion and coupled to the frame when installed.

Abstract: An exhaust pipe structure of a motorcycle allowing exhaust air of an exhaust pipe having a branching part to flow into the respective exhaust pipes on the downstream side of the branching part uniformly and smoothly. In an exhaust pipe structure of a motorcycle having an engine attached to a vehicle body frame, an exhaust pipe is connected to an exhaust port of the engine and is provided with a branching pipe that branches into a left-rear-portion exhaust pipe and a right-rear-portion exhaust pipe. A muffler is connected to the left-rear-portion exhaust pipe. A muffler is connected to the right-rear-portion exhaust pipe. The branching pipe is located on a lateral side of a cylinder unit of the engine and above a crankcase cover.

Abstract: A rear structure for a saddle-ride type vehicle includes a rear fender made of resin and configured to cover an upper side of a rear wheel the vehicle. The rear fender includes: a bottom portion facing the rear wheel; a first side portion extending upward integrally from each of left and right end portions of the bottom portion; and a bending portion formed integrally with the bottom portion to be bendable at a hinge portion provided therebetween, and configured to be bent and stood upright from the bottom portion, and joined to the first side portion to form a second side portion. Since the second side portion is formed by bending and standing the bending portion from the bottom portion, and joining the bending portion to the first side portion, there is no need to engage a tip end of the bending portion with the bottom portion.

Abstract: A motorcycle comprises a vehicle body frame; a front seat including a front seat body section on which a rider is to be seated, and a protruding section protruding rearward from the front seat body section; a rear seat including a rear seat body section on which a passenger is to be seated, and a recessed section which is provided in a front portion of the rear seat body section and opened upward and forward; and a seat lock device mounted to the vehicle body frame. In a state in which a front portion of the rear seat is placed over the vehicle body frame from above, the protruding section of the front seat is accommodated into the recessed section of the rear seat and presses the recessed section from above, and the front seat is locked by the seat lock device.

Abstract: The invention is a motorcycle with a main frame (1), the main frame (1) holding a rear swing arm assembly (2) with a rear wheel assembly (3), said main frame (1) holding an engine (12) and a drive train (13) connected to the rear wheel assembly (3). The main frame (1) is connected via a pivot joint (9) near the main frame's (9) upper, fore portion to a top frame (7), and the pivot joint (9) has a transverse axis (9?) relative to the main frame (1). The top frame (7) has a rearwards extending seat frame (8) provided with a seat (15) and a forward extending steering neck frame (5) holding a steering neck (6) further holding a triple tree assembly (14) with a front fork assembly (4) with a front wheel assembly (10). The main frame (1) is provided with an actuator assembly (16) for providing rotation of the top frame (7) relative to the main frame (1).

Abstract: In a rear wheel suspension structure of a motorcycle includes a body frame, a swing arm swingably supported by the body frame through a pivot shaft and a drive shaft for transmitting drive power to a rear wheel. A drive shaft insertion hole is formed in the swing arm with the drive shaft being inserted in the insertion hole. The pivot shaft is arranged so as to overlap with the drive shaft insertion hole in a side view. The pivot shaft is provided as a one-side supporting shaft. Another-side supporting shaft is provided independent from each other on the left and right. A thrust bearing and a radial bearing are arranged between the swing arm and the one-side supporting shaft as well as the another-side supporting shaft provided in the swing arm.

Abstract: A motorcycle comprising a hollow self-supporting shell integrating the steering column, means for securing the engine and means for securing the suspension system, said shell having an inner space forming a petrol tank, said shell also including the driver's seat. Said shell has hollow spaces which are closed on either side of the median longitudinal vertical plane. The driver's seat is preferably formed by an extension of the hollow spaces.

Abstract: One or more throttle bodies and a surge tank are disposed behind a cylinder head, and an intercooler is disposed by being adjacent to the surge tank at a position behind the cylinder head and the one or more throttle bodies. A supercharger is provided in front of the intercooler.

Abstract: A storage structure for a saddle-ride type vehicle to enable an item to be easily stored in or retrieved from a storage portion to improve handleability of the storage portion. The storage portion includes an opening provided at a position shifted to one or each side of a front cover in a left-right direction with a recess portion being concave downwardly from the opening to form a storage space. A lid is provided for covering the opening of the recess portion openably and closably. The lid is attached to an upper wall portion defining the recess portion, openably and closably via a hinge.

Abstract: A forged head pipe for a motorcycle frame is integrally formed and includes a main frame attachment portion, a pipe portion, and a lower extension extending downwardly from the pipe portion. A down frame attachment portion is provided on the lower extension, and is spaced away from the main frame attachment portion and the pipe portion. A down frame is welded to the down frame attachment portion by contacting the same without inserting the same. The down frame attachment portion is configured from a connecting portion, extending in parallel to the pipe portion, and an extension extending rearwardly from a lower end portion of the connecting portion. By eliminating an insertion socket, manufacturing cost is reduced, and welding quality is improved by spacing the down frame downwardly below the main frame attachment portion and the pipe portion, to which a high load is applied.

Abstract: An engine includes a first cylinder communicating with a first intake port and a first exhaust port, and an exhaust assembly coupled to the engine and including a first exhaust manifold coupled to the first exhaust port. The first exhaust manifold is angled relative to the first exhaust port.

Abstract: A structure for a headlight cowl for reducing the difference in steering feeling between the starting of a pivotal motion and a succeeding pivotal motion when the handlebar is pivoted so that the driver is less likely to have an uncomfortable feeling. The structure of a headlight cowl includes a steering apparatus supported for pivotal motion on a head pipe at a front end of a vehicle body frame and operable to turn a front wheel in accordance with a steering operation by a driver. A headlight cowl includes left and right side faces for covering the left side and the right side of a headlight provided on a front face of an upper portion of the steering apparatus and for guiding a flow of air to flow rearwardly. The headlight cowl includes projections that individually project outwardly in a vehicle widthwise direction from the left and right side faces.

Abstract: System and apparatus for a linkage protector comprising a linkage arm and a shield element. The linkage arm comprises a front mounting portion rotatably coupled to the frame mount and a pair of arms depending from opposite ends of the front mounting portion. Each arm comprises a rear mounting portion coupled to a linkage mount at an end opposite the front mounting portion. The shield element depends from a lower portion of the front mounting portion at a distance from the arm and is configured to protect a lower rear suspension linkage.

Abstract: An engine is mounted on a body frame extending from a steering head pipe toward a vehicle rear side slightly downward and an air cleaner is disposed above the engine. An intake duct device includes an intake duct which leads traveling air taken from a front surface of a cowling to the air cleaner so as to make the traveling air pass along both side surfaces of the steering head pipe. The intake duct is made of a separate component from the body frame, is two-divided into a front intake duct and a rear intake duct so as to surround the steering head pipe from front and rear sides, and is fixed to the body frame by fastening.

Abstract: A motorcycle (1) comprising a vehicle body frame (4) including a pair of right and left pivot frames (10) which extend continuously from rear portions of main frames (8), respectively, and to which front end portions of a swing arm (9) are mounted such that the swing arm is pivotable; an ABS unit (19) including a pump (19a) and a valve (19b) for the ABS unit; and a reservoir tank (20) including a container body (20a) which stores therein a cooling medium supplied to a radiator (17) and has a cooling medium port, and a cap (20b) which closes the cooling medium port of the container body (20a), wherein the ABS unit (19) and the reservoir tank (20) are disposed inward relative to the pivot frames (10), and mounted to the vehicle body frame (4) via a common bracket (21).

Abstract: A straddle type vehicle has a seat on which an occupant sits, a pair of right and left footboards provided diagonally below and in front of the seat and allowing the occupant to place his or her feet thereon, and a projecting portion provided between the footboards and projecting upward, wherein an engagement portion for fixing a load mounted on the projecting portion is provided on an upper face side of each of the footboards. The engagement portion for fixing the load is readily visible, and hence workability in operation of mounting and dismounting the load on the vehicle body increases.

Abstract: A vehicle seat structure allowing a reduction in the weight of a seat while ensuring cushioning performance. The seat includes a base plate member with an outer frame forming an outer periphery of the seat, and concave portions with seating positions and a seat back position on an inner peripheral side of the outer frame made concave in a direction of a seating load. In addition, the seat includes a fabric member that is provided in a tensioned state in such a manner so as to close open sides of the concave portions for supporting an occupant's weight. A first cushion member is provided in positions on the fabric member, at least corresponding to the outer frame.

Abstract: Embodiments of a fork brace for a bicycle are disclosed herein. In one aspect, a brace portion is integrally formed along with two tubular fork members and an overlay fits in a mating relationship with the brace portion to create a unitary, tubular brace.

Abstract: A motorcycle of the present invention comprises a main frame, a fuel tank, and a bracket for fastening a front end portion of the fuel tank to a front portion of the main frame. The bracket includes a bracket body of a flat plate shape, and frame joining portions which partially swell from the bracket body toward the main frame on a reverse surface of the bracket body, wherein the reverse surface is configured to contact the main frame. The frame joining portions are configured to contact the main frame such that a gap through which a throttle cable extends is formed between the bracket body and the main frame. This makes it possible to place the cable such that the cable does not extend around an outer periphery of the bracket provided to fasten the fuel tank to the vehicle body frame.

Abstract: To provide a vehicle body frame for a motorcycle which includes a head pipe having good dimensional accuracy. A head pipe includes a left half which is obtained by die forming, a right half which is obtained by die forming, and beads with which the right half is integrated with the left half by laser welding. The head pipe is formed by joining the left half and the right half to each other with the first and second beads which are laser weld beads. Laser weld beads are significantly smaller in bead width than arc weld beads, and therefore their shrinkage after their solidification is significantly smaller. As a result, a head pipe having good dimensional accuracy is obtained.

Abstract: A motorcycle includes an extended and lower frame arrangement, a front wheel coupled to the extended and lower frame arrangement via a front wheel extension member to frontwardly extend a distance between the extended and lower frame arrangement and the front wheel, a rear wheel coupled to the extended and lower frame arrangement via a widen hub assembly to rearwardly extend a distance between the extended and lower frame arrangement and the rear wheel, such that the front wheel and the rear wheel are shifted far from the extended and lowered frame arrangement to lengthen a distance between the front wheel and the rear wheel so as to further lower a center of gravity of the motorcycle.

Abstract: A housing structure for a saddle type vehicle wherein the housing structure is not limited by the size of an opening/closing lid (shelter lid) for a fuel tank. The housing structure can provide a space for storage wherein the shelter lid is easily opened even when a heavy item is stored in the space. A tank shelter is formed by a cover that can be divided into a plurality of covers. A housing pocket is fixed to the inside of the tank shelter. A loading and unloading opening in the housing pocket faces an opening portion of the tank shelter. A dimension in a direction of vehicle width of the housing pocket is larger than a width of the opening portion of the tank shelter.

Abstract: A secondary air supply system is arranged efficiently and compactly, in a V-type engine including a front-side cylinder and a rear-side cylinder. A motorcycle has a secondary air supply system which is provided between an air cleaner and an exhaust passage of an engine. The secondary air is supplied from the air cleaner into the exhaust passage of the engine. The secondary air supply system has a reed valve in a position for being exposed to the exhaust passage. The reed valve includes a front-side reed valve used for a front-side cylinder and a rear-side reed valve used for a rear-side cylinder. The front-side reed valve is disposed at a front portion of the air cleaner, with the longitudinal direction of the front-side reed valve set along the height direction.

Abstract: In a method for controlling braking torque in a two-wheeled vehicle traveling in an inclined position, the driver specifies a desired braking torque, which is divided into wheel braking torques at the front wheel and at the rear wheel in such a manner, that a steering torque resulting from the wheel braking torques is less than a limiting value.

Abstract: A combustion engine mounted on a motorcycle includes an engine rotary shaft extending in a vehicle widthwise direction and a supercharger disposed rearwardly of a cylinder block. The combustion engine also includes an air intake duct through which an incoming wind flowing forwardly of a traveling direction with respect to the combustion engine is introduced into the supercharger. The air intake duct is fluid connected with an air intake port of the supercharger after having passed laterally of the combustion engine.

Abstract: A hollow main frame extends rearwardly from a head pipe. An air cleaner includes a filter element disposed in the main frame forming a dirty side and a clean side. The main frame includes a front opening for introducing intake air. The main frame includes an inner wall surface having a first rib extending peripherally and projecting inwardly into the space in the main frame. A second rib is disposed upstream or downstream of the first rib with respect to an intake air flow and projects inwardly into the space in the main frame. The filter element has an engaging member extending substantially along the inner wall surface and engageable with the second rib. The first rib peripherally surrounds the filter element to provide a division wall with the second rib engaging the filter element to support the filter element.

Abstract: A motorcycle foot anchor includes a foot anchor including a base, a body and an end portion. The base of the foot anchor is coupled to a motorcycle frame. The foot anchor protrudes from the motorcycle frame. A plurality of concentric grooves including pointed edges are disposed on the foot anchor. The pointed edges of the concentric grooves point toward the motorcycle frame. The end portion of the foot anchor has a larger diameter than a diameter of the body of the foot anchor.

Abstract: Straddle type vehicle takes traveling wind into a space between paired left and right main frames. Air is introduced to an air cleaner arranged between the paired left and right main frames. The paired main frames include left and right U-shaped portions having U-shaped cross sections opened inward in the vehicle width direction and constituting a part of an air cleaner case. Hollow left and right frame portions are provided below the left and right U-shaped portions, and the air cleaner is arranged between the left and right U-shaped portions.

Abstract: A straddle type vehicle may be provided with a side bag support member in which a horizontal wall part is extended inward in the vehicle width direction from a vertical wall part fixed to a portion of a side bag on the inside in the vehicle width direction to an area below a lower surface part of a rear side cover, and the horizontal wall part is fixed from below to a side bag support part on a lower surface side of a seat frame.

Abstract: A fuel tank structure of straddle type vehicle in which a wide space below the fuel tank can be secured and a clearance portion for avoiding the fuel tank interfering with the vehicle body side can be downsized. The fuel tank is supported on and disposed above a main frame with a fuel pump being installed to a bottom plate of the rear portion of the fuel tank. A maintenance space formed below the fuel pump when the rear portion of the fuel tank is lifted in a state wherein an installation portion of a front bracket installed to the front lower portion of the fuel tank is rotatably supported on the main frame. The fuel tank is configured such that the installation portion of the lower end of the front bracket is disposed below the bottom plate, simultaneously, and is installed to the main frame with a bolt.

Abstract: A body frame has a head pipe supporting a steering shaft, a main frame extended rearward of a vehicle body from the head pipe, and a down frame extended downward of the vehicle body from the head pipe, wherein the down frame includes a front down frame member forming at least a front portion of the down frame, and a rear down frame member forming at least part of a rear portion of the down frame, which are joined. The rear down frame member integrally has an arm supporting the main frame and a gusset reinforcing a joined portion of the main frame to the head pipe.

Abstract: A vehicle body frame manufactured by welding is configured for weight reduction, and includes first and second frame members. The first frame member has a predetermined thickness including a first flat surface portion wider than the predetermined thickness. The second frame member includes a second flat surface portion touching the first flat surface portion. The first and second frame members are joined by bringing the flat surface portions together and welding the first and second flat surface portions together with laser beams parallel to the first flat surface portion. In this way, the laser welding can be performed with a reduced gap between the two members. Welding using laser beams applied from directions parallel to the flat surfaces allows the weld area to be significantly larger than conventional fillet welding.

Abstract: An opening of an upper surface of an air cleaner main body has an air cleaner upper cover mounted thereon, and is closed by the air cleaner upper cover fastened by bolts via a seal member, and air cleaner bottom plates are fastened to the air cleaner main body via seal members in openings of a bottom surface of the air cleaner main body. Passage holes connecting an engine combustion chamber and the air cleaner main body are provided on the air cleaner bottom plates; and an opening of a front surface of the air cleaner main body is inserted into intake ducts of vehicle body frames via seal members, and configured as an air introduction port.

Abstract: The present invention provides a bicycle comprising front and rear wheels and a frame including a main frame having a head tube and a top tube secured to the head tube at an intersection spaced from an upper end of the head tube. The intersection has a first lateral width, and the head tube above the intersection includes a tapered portion that tapers to a second lateral width narrower than the first lateral width. For example, the first lateral width can be at least three percent wider than the second lateral width. In one embodiment, the head tube above the tapered portion includes a flared portion that flares to a third lateral width wider (e.g., at least ten percent wider) than the second lateral width. In addition, the tapered portion can include a length that is larger (e.g., at least one hundred percent larger) than the second lateral width.

Abstract: A routing structure for a saddle type vehicle for suppressing an increase in the number of parts while the appearance of play is suppressed. The routing structure for a saddle type vehicle includes a cable guide portion formed integrally with a storage box and configured to guide an operational cable of a wire cable structure. The cable guide portion is formed in a shape of a gutter along an outer side of a peripheral edge of an opening of the storage box.

Abstract: The motorcycle includes a power unit having a crankcase of an internal combustion engine, the fuel injection system mounted to the power unit, a fuel tank, a fuel pump unit by which fuel in the fuel tank is supplied to the fuel injection system, and the fuel filter device. The fuel supply system for the motorcycle includes the fuel filter device that is cylindrical in shape, the pressure regulator cylindrical in shape is mounted to an outside portion of the fuel filter device, with its cylinder axis inclined against the cylinder axis of the fuel filter device. A fuel pipe extends from an outlet pipe of the pressure regulator to the fuel injection system in a connecting manner.

Abstract: There is provided a vaporized fuel control device for a straddle type vehicle that can prevent a situation that liquid fuel in a fuel tank flows into an engine and a situation that oil in the engine flows into the fuel tank while adapting the vaporized fuel control device to the layout of the straddle vehicle. A vaporized fuel passage 110 is disposed so as to have an uppermost portion X at some position thereof between the fuel tank 35 and the engine E, and the uppermost portion X is disposed at a higher position than the fuel upper limit level of the fuel tank 35, the oil upper limit level in the engine E and a footrest portion 44.

Abstract: An internal combustion engine having two cylinders, which are arranged in “V” configuration and accommodate respective pistons, and a first balancing body, which is fixed to a crankshaft at a first piston so that the first order reciprocating inertial forces of the first piston lie on a first straight line forming a first inclination angle which is not zero with the first cylinder; the combination of an angle between the cylinders with the first inclination angle is such that the first straight line on which the first order reciprocating inertial forces generated by the first piston lies is parallel to a second straight line on which the first order reciprocating inertial forces generated by the reciprocating motion of a second piston lie.

Abstract: A fuel system for a work vehicle including a fuel tank comprising a main tank body and an auxiliary tank body, a canister, and a fuel-gas introducing passage for connecting a top portion of the auxiliary tank body to the canister. The top portion of the auxiliary tank body is located higher than the main tank body when the fuel tank is installed on the work vehicle. A fuel filling pipe extends through the top portion of the auxiliary tank body and has a first end arranged outside the auxiliary tank body and a second end arranged within the auxiliary tank body.

Abstract: A vehicle height adjusting device includes: a changing unit that changes relative positions of a vehicle main body and wheels of a vehicle; and a control unit that adjusts a vehicle height that is a height of the vehicle main body by controlling the changing unit to change the relative positions, in which the changing unit includes an electromagnetic valve that is provided on a circulation path of a fluid and that is adjusted to have an opening amount in accordance with supplied power and changes the relative positions as pressure of the fluid varies in accordance with the opening amount of the electromagnetic valve, and the control unit performs Pulse-Width-Modulation control on voltage applied to the electromagnetic valve so that the opening amount of the electromagnetic valve equals a desired opening amount.

Abstract: An exhaust gas sensor arrangement structure for a motorcycle includes a vehicle body frame, an internal combustion engine suspended on the vehicle body frame between front and rear wheels and exhaust pipes extending toward a rear side in the longitudinal direction of a vehicle from a front side of the internal combustion engine in the longitudinal direction of the vehicle in a state where the exhaust pipes extend below the internal combustion engine. Exhaust gas sensors are arranged on upper halves of the exhaust pipes arranged between the internal combustion engine and the bottom frame portions as viewed from a front side in the longitudinal direction of the vehicle in a state where the exhaust gas sensors are sandwiched between the internal combustion engine and the bottom frame portions as viewed from a front side in the longitudinal direction of the vehicle.

Abstract: A rear center cover is disposed in contact with a seat edge portion and a rear end portion of a passenger seat in a tandem seat. A pair of left and right grab rails are disposed overlapping the seat edge portion in a plan view, i.e., disposed overlapping the seat edge portion and the rear center cover from above in such a way as to cover the portion connecting the rear center cover. A rear portion extends to the upper side of a recessed portion. The lower surface of the rear portion is in intimate contact with the upper side. The rear portion covers the portion connecting the rear center cover and the seat edge portion and reinforces the rear center cover.

Abstract: A waterproof structure for an electronic device (60) includes: a case (130) which is disposed in a location in a vehicle (10) distant from a receiving antenna (61), which houses a processing unit (69) that processes location information, and which has a wiring hole (171) through which a wire (62) passes; a cylindrical part (172) which extends in the axial direction of the wire from the case in such a manner as to surround the wiring hole; a seal member (167) which is housed in a compressed state in the cylindrical part, and surrounds the wire; and a cap (160) which is attached to the case in an attachable/detachable manner, has a hole (168) through which the wire passes, and prevents the seal member from moving.

Abstract: A fuel tank assembly includes a fuel tank disposed substantially along a seat rail in a space surrounded by a lower portion of a seat and the seat rail of a motorcycle, and a fuel pump unit disposed in a lower portion of the fuel tank. A mounting flange for mounting the fuel pump unit to the fuel tank is arranged below the seat rail and forward of a front end of a rear wheel of the motorcycle as viewed in a side view of the motorcycle. The mounting flange of the fuel pump unit is disposed above a side frame of a body frame of the motorcycle. Such fuel tank assembly provides the degree of freedom of seat layout, and does not interfere with a rear wheel of motorcycle, or gravel or the like thrown up by the rear wheel, during operation the motorcycle.

Abstract: A cooling device is incorporated into a V-type engine E in which a front cylinder and a rear cylinder are arranged in V-shape and a rear exhaust pipe is placed at a right side of a vehicle body. The cooling device 1 includes an intake duct and a fan. The intake duct has a suction port which opens toward the rear exhaust pipe. The fan suctions the air into the interior of the intake duct through the suction port and exhausts the suctioned air to a location distant from the exhaust pipe.

Abstract: A side cover structure for straddle type vehicle for preventing heat at a part of the vehicle such as a knee grip portion, where the passenger's legs touch. An engine is supported on the vehicle body frame with a passenger seat disposed above the engine. A side cover covers the side direction of the vehicle body. The side cover has a knee grip portion at the position where the passenger's legs touch in the front direction of a passenger seat. In addition, the knee grip portion is doubly configured inside and outside.

Abstract: Embodiments of the invention describe vehicles including a wheel (e.g., a front wheel or wheels), a wheel hub, a motor included in the wheel hub to transmit power to the wheel, one or more rolling bearings to support the wheel hub and having one or more rolling elements to enable rolling of the wheel, and a steering axle placed within the wheel hub for steering the wheel. Embodiments also describe a wheel (e.g., a rear wheel or wheels), a wheel hub, a motor included in the wheel hub to transmit power to the wheel, and a swing arm assembly having a first and a second end, the first end rotatably coupled to a steering axle, the second end coupled to the motor. As described below, embodiments of the invention decrease volume necessary for a vehicle's drivetrain, while not adversely affecting the potential for vehicle interior volume and vehicle maneuverability.

Abstract: An engine is mounted on a body frame extending from a steering head pipe toward a vehicle rear side slightly downward and an air cleaner is disposed above the engine. An intake duct device includes an intake duct which leads traveling air taken from a front surface of a cowling to the air cleaner so as to make the traveling air pass along both side surfaces of the steering head pipe. The intake duct is made of a separate component from the body frame, is two-divided into a front intake duct and a rear intake duct so as to surround the steering head pipe from front and rear sides, and is fixed to the body frame by fastening.

Abstract: A first main frame segment 62 extends rearwardly from a head pipe 4, a second main frame segment 64 pivotally supports a swingarm 12, and an engine casing EC is disposed between the head pipe 4 and the swingarm 12. The engine casing EC includes a crankcase section 28, a cylinder part 30, a cylinder head part 32 and a transmission casing section 34. The first main frame segment 64 includes a first mount portion 56, which is connected with a front portion of the cylinder part 30, and a second mount portion 58 which is connected with a rear portion of the cylinder head part 32. The second main frame segment 64 includes a third mount portion 60 which is connected with a rear portion of the transmission casing section 34.