JP4850044B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle, and more particularly to a motorcycle including an exhaust control valve that changes a cross-sectional area of an exhaust passage in an exhaust pipe in accordance with an operation state.

  Patent Document 1 discloses a conventional motorcycle. The motorcycle includes a frame, an engine, an exhaust pipe, and an exhaust control valve.

  The frame includes a head pipe, a main frame extending diagonally downward and rearward from the head pipe and forming a pair in the vehicle width direction, and a rear frame extending diagonally upward and rearward from the lower side of each main frame and forming a pair in the vehicle width direction. And have. The engine is supported by this frame and has four exhaust ports in front.

  The exhaust pipe is composed of four upstream exhaust pipes, two upstream exhaust collecting sections, two intermediate exhaust pipes, one downstream exhaust collecting section, and one downstream exhaust pipe. Each upstream exhaust pipe is connected to an exhaust port, and two pipes are connected to the upstream exhaust collecting portion below the engine. Further, below the engine, each upstream exhaust collecting portion is connected to an intermediate exhaust pipe, each intermediate exhaust pipe is connected to a downstream exhaust collecting portion, and the exhaust collecting portion is connected to the downstream exhaust pipe. The downstream exhaust pipe is routed through the inside of the rear frame on one side of the vehicle, and an exhaust muffler is connected to the downstream side.

  In this motorcycle, an exhaust control valve is provided in the downstream exhaust collecting portion. The exhaust control valve is fixed to a disc-shaped valve body located in the downstream exhaust collecting portion, a valve shaft that protrudes horizontally on both sides in the radially outward direction from the valve body, and a valve shaft on one side of the vehicle. A pulley, a wire that is driven forward and backward by a motor and wound around the pulley, and an adjustment unit that can adjust the length of the wire in the vicinity of the pulley. The pulley is concealed by a pulley cover fixed to the downstream exhaust collecting portion.

  In this motorcycle, when the motor is driven according to the driving situation, the exhaust control valve causes the pulley to drive the valve shaft through the wire, and the valve body changes the cross-sectional area of the exhaust passage in the exhaust pipe. . As a result, torque characteristics at medium and low speeds can be improved.

  Further, in this motorcycle, since the exhaust control valve is provided in the downstream exhaust collecting portion below the engine, the protruding portion of the exhaust control valve protruding outward from the downstream exhaust collecting portion is the driver who is operating Will not get in the way.

JP 2005-83358 A

  The large motorcycle as described above is a vehicle for traveling on a normal road that has been maintained, and there is almost no concern that the protruding portion of the exhaust control valve is covered with mud. In addition, since this motorcycle has a large vehicle body, the exhaust pipe is long and there is also room for the exhaust pipe to be routed. Therefore, the installation position of the control valve to the exhaust pipe is designed. The degree of freedom is large, so there is not much worry.

  However, in order to cope with off-road driving, which has become popular in recent years, on-off type motorcycles (types that run on both general roads that have not been developed and roads that have not yet been developed) are on the market. It can be said that it is preferable to attach an exhaust control valve to such an on-off type motorcycle in terms of torque characteristics at medium and low speeds.

  However, on-off type motorcycles are also premised on traveling on rough roads or rough muddy roads, so that the exhaust pipe led from the engine is led to the rear of the vehicle through the side of the engine. ing. For this reason, depending on the position where the exhaust control valve is provided, the exhaust control valve may interfere with the operating driver. In this case, there is a possibility that the exhaust control valve may be damaged when it falls, or a small stone or the like collides with the exhaust control valve and may be damaged.

  The present invention has been made in view of the above-mentioned conventional situation, and is operated by an exhaust control valve even in a motorcycle in which an exhaust pipe led out from an engine is led to the rear of the vehicle through the side of the engine. The problem to be solved is to prevent the exhaust control valve from being damaged while preventing the driver inside from being disturbed.

The motorcycle of the present invention includes a head pipe, a main frame extending diagonally downward and rearward from the head pipe, and a pair of main frames extending in the vehicle width direction, and extending diagonally upward and rearward from the lower side of each main frame. A frame having a pair of rear frames,
An engine supported by the frame and having an exhaust port in front;
An exhaust pipe connected to the exhaust port and routed through the sides of the engine and the inside of the main frame and the rear frame;
An exhaust control valve that is provided in the exhaust pipe and changes a cross-sectional area of an exhaust flow path in the exhaust pipe according to an operation situation;

The exhaust control valve has a projecting portion projecting outward in the radial direction of the exhaust pipe, and the projecting portion is located inside the outermost ends of the main frame and the rear frame ,
The frame has a V-shaped portion in which the main frame and the rear frame are substantially V-shaped in a side view of the vehicle, while the exhaust control valve is attached to the exhaust pipe, and at the lower side in the V-shaped portion on the vehicle side It is characterized by being exposed to the direction .

  In the motorcycle of the present invention, the exhaust pipe is routed through the side of the engine and through the inside of the main frame and the rear frame, and the exhaust pipe is provided with an exhaust control valve for improving torque characteristics. Further, the exhaust control valve has a protruding portion that protrudes outward in the radial direction of the exhaust pipe, and is located inside the outermost ends of the main frame and the rear frame. Here, the outermost ends of the main frame and the rear frame refer to portions of the main frame and the rear frame that are located on the outermost side of the vehicle body. For this reason, in this motorcycle, the protrusion does not interfere with the driver who is driving.

  Further, in the motorcycle according to the present invention, since the position of the exhaust control valve is high, mud does not easily adhere to the protruding portion, and the smooth movement of the pulley is easily maintained. In addition, since the exhaust control valve is located higher and the protrusion is located on the inner side of the outermost ends of the main frame and rear frame, there is little risk of pebbles and the like colliding with the protrusion, and the motorcycle falls over. However, it is difficult for the protrusion to be displaced. For this reason, this motorcycle can easily maintain a suitable torque characteristic by the exhaust control valve.

Therefore, according to the present invention, in the motorcycle in which the exhaust pipe led out from the engine is led to the rear of the vehicle through the side of the engine, the driver during driving is not disturbed by the exhaust control valve, Damage to the exhaust control valve can be prevented.
Further, since the exhaust control valve is disposed in the V-shaped part formed by the main frame and the rear frame and is exposed to the side of the vehicle in the lower part thereof, the exhaust control valve interferes with the driver. This can be avoided even more. In addition, such an arrangement contributes to easy assembly work, mud washing, and adjustment.

  When the exhaust pipe has a curved portion that curves inward in the vehicle width direction, the exhaust control valve is preferably provided at the curved portion. In this case, since the exhaust control valve is closer to the center side in the vehicle width direction, the protruding portion does not reliably disturb the driver. In addition, mud is less likely to adhere to the protrusion, and even if it falls down, the protrusion is less likely to be displaced.

The motorcycle according to the present invention may include a seat supported by a frame and a side cover that is supported by the frame and partially covers a lower portion of the seat. Projections are preferably located inside the outer surface of the side cover (claim 3). In this case, the exhaust control valve does not get in the way of the driver by the side cover. In addition, mud is less likely to adhere to the protrusion, and even if it falls down, the protrusion is less likely to be displaced.

Protrusion is a front of the side cover, it is preferable that a position visible from the side (claim 4). In this case, the exhaust control valve can be easily adjusted without removing the side cover.

The motorcycle of the present invention may include a step that is supported by a frame and supports a sole of a driver. Projections are preferably provided above the vicinity and inside of the step (claim 5). In this case, it is possible to prevent mud from being applied to the protrusion by the legs of the driver who is driving.

The exhaust control valve is a disc-shaped valve body located in the exhaust pipe, a valve shaft protruding from the valve body on both sides in the radially outward direction, a pulley fixed to one end side of the valve shaft, and a forward / backward drive by a motor. And a wire wound around the pulley, and an adjusting portion capable of adjusting the length of the wire in the vicinity of the pulley. Protrusion may include the pulley and the adjuster (claim 6). In this case, an important protrusion including the pulley and the adjustment unit does not interfere with the driver. Moreover, since this protrusion does not protrude, the adjustment of the exhaust control valve hardly changes even if it falls down.

The protrusions may preferably be concealed by a pulley cover (claim 7). In this case, even if the motorcycle falls, the adjustment of the exhaust control valve is less likely to change.

The valve shaft is preferably inclined with respect to an imaginary vertical line so that the protruding portion faces outward and upward ( Claim 8 ). In this case, it is easy to operate the adjustment unit, and the exhaust control valve can be easily adjusted.

The motorcycle according to the present invention can be realized by an on-road type (a type that mainly travels on a general road that has been maintained) and an off-road type (a type that mainly travels on an undeveloped road). Of these, the motorcycle of the present invention is preferably an on-off type ( claim 9 ).

  Off-road and on-off motorcycles are assumed to travel on rough roads or rough muddy roads, so the distance between the front wheel and the front fender and between the rear wheel and the rear fender when stopped. The stroke of the shock absorber for the front wheel and the rear wheel is increased. For this reason, off-road and on-off type motorcycles can run on both general roads that have been maintained and road surfaces that are not yet maintained, while not only being required to be small and light, but also to be equipped with mounted members as much as possible. It is necessary to improve the steering performance of the vehicle by the driver so that the center of gravity of the entire vehicle is concentrated in the center without being dissipated. On-off type motorcycles are also required to have a comfortable driving performance on a general road that has been maintained, and therefore, it is required to improve torque characteristics particularly at medium and low speeds. If the motorcycle of the present invention is an on-off type, the effects of the present invention can be exhibited when traveling on a general road that has been maintained and when traveling on an undeveloped road surface.

  Embodiments 1 and 2 embodying the present invention will be described below with reference to the drawings.

  The motorcycle according to the first embodiment is an on-off type as shown in FIG. In this motorcycle, a pair of main frames 1b (shown only on the right side of the vehicle) are fixed to the head pipe 1a in the vehicle width direction. Each main frame 1b extends obliquely downward and rearward. Each main frame 1b can be constituted by a main frame main body fixed to the head pipe 1a and extending obliquely downward and rearward, and a rear arm bracket fixed to the main frame main body and extending diagonally downward and rearward.

  A pair of rear frames 1c (only those on the right side of the vehicle are shown) are fixed to the lower side of each main frame 1b by bolts 3 in the vehicle width direction. Each rear frame 1c extends obliquely upward and rearward. Further, a pair of seat rails (not shown) that are paired in the vehicle width direction are fixed at substantially the center of each main frame 1b. Each seat rail extends substantially horizontally rearward, and each rear end is fixed to the upper end of the rear frame 1c.

  Further, between the head pipe 1a and the lower side of each main frame 1b, a down tube 1d (belonging to the right side of the vehicle) extends downward from the head pipe 1a, curves backward, and is fixed below the main frame 1b. Only one of them is shown in a pair in the vehicle width direction. Step 2 for supporting the soles of the drivers is fixed to a joint portion between the lower ends of both main frames 1b and the down tube 1d.

  The head pipe 1a, both main frames 1b, both rear frames 1c, both seat rails, both down tubes 1d, and a bracket or the like appropriately provided to connect them constitute a frame 1. The frame 1 has a V-shaped portion 1e in which both main frames 1b and both rear frames 1c are substantially V-shaped in a vehicle side view.

  A front fork 5 having a front shock absorber is supported on the head pipe 1a. A front wheel 7 is provided at the lower end of the front fork 5, and a handle 9 is provided at the upper end of the front fork 5. A front fender 11 and a cowl 13 are fixed to the head pipe 1a. In the stop state, a large space is ensured between the front wheel 7 and the front fender 11, and the stroke of the shock absorber for the front wheel is increased.

  A pivot shaft 14 (see FIG. 2) is provided in the vehicle width direction at the lower ends of both main frames 1b. As shown in FIG. 1, the pivot shaft 14 is provided with a rear arm 15 that can swing up and down, and a rear wheel 17 at the rear end of the rear arm 15. A link mechanism 19 is provided between the rear arm 15 and the frame 1, and a rear shock absorber 21 is mounted between the link mechanism 19 and the frame 1. In addition, the front wheel 7 and the rear wheel 17 in FIG. 1 show only some spokes.

  A four-cycle engine 23 having a single exhaust port in front is fixed between the main frames 1b and the down tubes 1d. A fuel tank 25 is fixed to both main frames 1b. Reference numeral 27 denotes an air cleaner, and 29 denotes a fuel injection device that supplies fuel to the engine 23.

  An exhaust pipe 31 having a circular cross section in the direction perpendicular to the axis is connected to the exhaust port of the engine 23. The exhaust pipe 31 protrudes slightly forward while facing downward from between the two down tubes 1d, and is directed upward to reach the right side of the engine 23 across the down tube 1d on the right side of the vehicle. It is routed to extend obliquely upward and rearward through the inner lower portion of the V-shaped portion 1e on the right side.

  As shown in FIG. 2, the exhaust pipe 31 has a curved portion 31 c that curves inward in the vehicle width direction when passing through the inner lower portion of the V-shaped portion 1 e. As shown in FIG. 1, an exhaust muffler 33 extending obliquely upward and rearward is connected to the rear end of the exhaust pipe 31.

  A seat 35 is fixed on the seat rail, and a side cover 37 that partially covers the lower portion of the seat 35 is fixed between the seat rail and both rear frames 1c. A muffler cover 39 is fixed to a rear frame 1c on the right side of the vehicle, and a rear fender 41 is fixed. In the stop state, a large interval is secured between the rear wheel 17 and the rear fender 41, and the stroke of the rear shock absorber 21 is increased.

  As shown in FIGS. 2 and 3, an oxygen sensor 32 for detecting the oxygen concentration in the exhaust gas is fixed to the curved portion 31 c of the exhaust pipe 31. The bending portion 31 c is provided with an exhaust control valve 50 on the downstream side of the oxygen sensor 32. More specifically, as shown in FIG. 2, the exhaust control valve 50 is provided at a portion of the curved portion 31c that is located on the innermost side in the vehicle width direction. Further, as shown in FIG. 3, the exhaust control valve 50 is provided in the exhaust pipe 31 at the lower part in the V-shaped portion 1 e of the frame 1.

  In the exhaust control valve 50, as shown in FIG. 4, shaft holes 31a and 31b are formed through the exhaust pipe 31 in the diameter direction. The axis O of the shaft holes 31a and 31b is inclined with respect to the virtual vertical line L so that the upper shaft hole 31a faces outward. A valve shaft 51 extending in the direction of the axis O is inserted through the shaft holes 31a and 31b. A disc-like valve body 53 located in the exhaust pipe 31 is fixed to the valve shaft 51 by two round screws 55. Has been.

  A boss member 57 is fixed to the exhaust pipe 31 around the upper shaft hole 31a. A flange 51a is formed on the valve shaft 51 that protrudes radially outward from the shaft hole 31a. A metal bearing 61 is provided between the valve shaft 51 and the boss member 57 while a washer 59 is brought into contact with the flange 51a.

  A lower spring seat 63 having a shaft hole 63a at the center is fixed to the tip of the boss member 57. The valve shaft 51 is inserted through the shaft hole 63 a of the lower spring seat 63, and a male screw 51 c is formed on the distal end side of the valve shaft 51. Further, an upper spring seat 65 coaxial with the lower spring seat 63 is provided on the tip side of the lower spring seat 63 so as to be rotatable with respect to the lower spring seat 63. A coil spring 67 having a lower end fixed to the lower spring seat 63 and an upper end fixed to the upper spring seat 65 is provided between the lower spring seat 63 and the upper spring seat 65.

  A disk-shaped plate 69 that engages with the valve shaft 51 is in contact with the upper surface of the upper spring seat 65. Further, a pressing plate 71 that is shaped so that its peripheral edge is separated from the plate 69 is in contact with the upper surface of the plate 69. A nut 73 that engages with the male screw 51 c of the valve shaft 51 is provided on the upper surface of the pressing plate 71, and the pressing plate 71 and the plate 69 are fixed to the valve shaft 51 by the nut 73.

  The upper spring seat 65, the pressing plate 71, and the plate 69 are welded to each other to form a pulley 70, and two cylindrical ends 75a and 75b can be fixed to the front of the pulley 70. Wires 77a and 77b are fixed to both ends 75a and 75b, respectively, and both wires 77a and 77b are wound around a pulley 70 and extended rearward as shown in FIGS.

  Both wires 77a and 77b are provided with adjusting portions 79 and 81 each having a pair of front and rear lock nuts and adjusters. A bracket 83 is fixed to the exhaust pipe 31, and an adjuster is fixed to the bracket 83 by front and rear lock nuts. Both wires 77a and 77b are covered behind the adjusting portions 79 and 81, respectively, and are connected to the stepping motor 85 at the rear.

  As shown in FIG. 1, the stepping motor 85 is fixed to an air cleaner (not shown) inside the side cover 37 and is connected to a controller (not shown). The controller controls the stepping motor 85 in accordance with the operation status, and the stepping motor 85 moves the wires 77a and 77b back and forth by this control.

  As shown in FIGS. 2 and 3, the pulley 70 rotates counterclockwise against the biasing force of the coil spring 67 when the wire 77a is pulled, and attaches the coil spring 67 when the pull of the wire 77a is released. Return to the neutral position by succumbing to power. Further, when the wire 77b is pulled, the pulley 70 rotates clockwise against the biasing force of the coil spring 67, and when the pull of the wire 77a is released, the pulley 70 returns to the neutral position due to the biasing force of the coil spring 67. . As a result, as shown in FIG. 4, since the valve shaft 51 rotates, the valve body 53 rotates in the exhaust pipe 31, and the cross-sectional area of the exhaust passage changes.

  As shown in FIG. 3, the plate 69 is provided with two pieces of stoppers 69a and 69b projecting radially outward from the valve shaft 51 around the axis O of the valve shaft 51 by a fixed angle. A receiving piece 87 that can come into contact with the stoppers 69 a and 69 b is fixed to the exhaust pipe 31. When one stopper 69a comes into contact with the receiving piece 87, the counterclockwise rotation of the pulley 70 is restricted, and when the other stopper 69b comes into contact with the receiving piece 87, the clockwise turn of the pulley 70 is restricted.

  As shown in FIG. 4, a cap 97 is fixed around the lower shaft hole 31 a of the exhaust pipe 31. A flange 51d is also formed on the valve shaft 51 protruding outward from the shaft hole 31b on the lower side of the exhaust pipe 31, and the metal bearing 99 is positioned between the valve shaft 51 and the cap 97 while being positioned on the flange 51a. Is provided.

  Thus, in this exhaust control valve 50, the pulley 70, the male screw 51c of the valve shaft 51, the nut 73 and the upper projecting portion 50a including the adjusting portions 79 and 81, the lower end side of the valve shaft 51 and the lower projecting portion including the cap 97. Part 50b. Cover brackets 89 and 91 are fixed to the exhaust pipe 31, and nuts 93 and 95 are fixed to the cover brackets 89 and 91.

  As described above, this motorcycle is not only required to be small and lightweight as an on-off type, but the mounting members are gathered as much as possible in the center of the vehicle, and the center of gravity of the entire vehicle is concentrated in the center without being dissipated. Thus, the steering performance of the vehicle by the driver is improved.

  In this motorcycle, when the stepping motor 85 is driven according to the driving situation, the exhaust control valve 50 causes the pulley 70 to rotationally drive the valve shaft 51 via the wires 77a and 77b, and the valve body 53 causes the exhaust pipe 31 to rotate. The cross-sectional area of the exhaust passage inside is changed. As a result, torque characteristics at medium and low speeds can be improved.

  In this motorcycle, an exhaust control valve 50 is provided in the exhaust pipe 31 that is routed through the side of the engine 23 and through the inner lower portion of the V-shaped portion 1e, and an upper projecting portion 50a of the exhaust control valve 50 and The lower protrusion 50b is positioned on the inner side of the outermost end 1b0 of the main frame 1b and the outermost end 1c0 of the rear frame 1c. Here, the outermost end 1b0 of the main frame 1b refers to the portion of the main frame 1b that is located on the outermost side of the vehicle body, and the outermost end 1c0 of the rear frame 1c refers to the outermost end of the vehicle body on the rear frame 1c. The part which is located outside. For this reason, in this motorcycle, the upper protruding portion 50a and the lower protruding portion 50b do not interfere with the driver who is driving.

  Further, in this motorcycle, since the position of the exhaust control valve 50 is high, mud does not easily adhere to the important upper protrusion 50a, mud does not easily bite into the coil spring 67, the pulley 70, etc., and the pulley 70 moves smoothly. Easy to maintain. Further, since the position of the exhaust control valve 50 is high and the upper protruding portion 50a is located on the inner side of the outermost end 1b0 of the main frame 1b and the outermost end 1c0 of the rear frame 1c, a pebble or the like is formed on the upper protruding portion 50a. Are less likely to collide, and even if the motorcycle falls, it is difficult for the upper protrusion 50a to be displaced. For this reason, this motorcycle can easily maintain a suitable torque characteristic by the exhaust control valve 50.

  Further, in this motorcycle, when the mud adhering to the upper protruding portion 50a is washed away or maintained by falling or the like, the operator places the head on the side of the engine 23 and performs the work. If you do, you will not be forced to take an unreasonable posture.

  In particular, in this motorcycle, since the exhaust control valve 50 is provided in the curved portion 31c of the V-shaped portion 1e of the exhaust pipe 31, the exhaust control valve 50 is located on the center side in the vehicle width direction, and the above operation is ensured. I play. Further, the exhaust control valve 50 at this position can be easily assembled. Further, since the upper protrusion 50a is located near and inside the step 2, mud is prevented from being applied to the upper protrusion 50a by the driver's legs during operation.

  Further, in this motorcycle, since the upper protrusion 50a is in front of the side cover 37 and is visible from the side, the adjusters 79 and 81 can be rotated without removing the side cover 37. The exhaust control valve 50 can be easily adjusted. This action is remarkable because the valve shaft 51 is inclined with respect to the virtual vertical line and the upper protrusion 50a faces outward.

  Therefore, according to this motorcycle, it is possible to realize the maintenance of a suitable torque characteristic and the improvement of the workability of mud washing and maintenance without causing the driver to feel the obstacle by the exhaust control valve 50. ing.

  In the motorcycle according to the second embodiment, as illustrated in FIGS. 5 and 6, the upper protrusion 50 a is concealed by the pulley cover 101. The pulley cover 101 is made of metal, and is fixed by screwing a round screw 102 into the nuts 93 and 95 of the cover brackets 89 and 91. Other configurations are the same as those of the first embodiment.

  In this motorcycle, since the upper protrusion 50a is concealed by the pulley cover 101, adjustment of the exhaust control valve 50 is less likely to change even if it falls down, and mud is less likely to adhere to the upper protrusion 50a. Other functions and effects are the same as those of the first embodiment.

  In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the first and second embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  INDUSTRIAL APPLICABILITY The present invention can be used for an on-road motorcycle, a motocross, a trial off-road motorcycle, or an on-off motorcycle.

1 is a side view of a motorcycle according to a first embodiment. 1 is a partial top view of a motorcycle according to a first embodiment. 1 is a partial perspective view of a motorcycle according to a first embodiment. 1 is an enlarged cross-sectional view of an exhaust control valve and the like according to a motorcycle of Embodiment 1. FIG. FIG. 3 is a partial perspective view of a motorcycle according to a second embodiment. 4 is an enlarged cross-sectional view of an exhaust control valve and the like according to the motorcycle of Embodiment 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Head pipe 1b ... Main frame 1c ... Rear frame 1 ... Frame 23 ... Engine 31 ... Exhaust pipe 50 ... Exhaust control valve 50a, 50b ... Projection part (50a ... Upper projection part, 50b ... Lower projection part)
1b0, 1c0 ... Outermost end 31c ... Curved portion 1e ... V-shaped portion 35 ... Seat 37 ... Side cover 2 ... Step 53 ... Valve body 51 ... Valve shaft 70 ... Pulley 85 ... Stepping motor (motor)
77a, 77b ... wire 79, 81 ... adjustment part 101 ... pulley cover

Claims (9)

A head pipe, a main frame extending diagonally downward and rearward from the head pipe and making a pair in the vehicle width direction; a rear frame extending diagonally upward and rearward from the lower side of each main frame and making a pair in the vehicle width direction; A frame having
An engine supported by the frame and having an exhaust port in front;
An exhaust pipe connected to the exhaust port and routed through the sides of the engine and the inside of the main frame and the rear frame;
An exhaust control valve that is provided in the exhaust pipe and changes a cross-sectional area of an exhaust flow path in the exhaust pipe according to an operation situation;
The exhaust control valve has a projecting portion projecting outward in the radial direction of the exhaust pipe, and the projecting portion is located inside the outermost ends of the main frame and the rear frame ,
The frame has a V-shaped portion in which the main frame and the rear frame are substantially V-shaped in a side view of the vehicle, while the exhaust control valve is attached to the exhaust pipe, and at the lower side in the V-shaped portion on the vehicle side A motorcycle characterized by being exposed to the side .   The motorcycle according to claim 1, wherein the exhaust pipe has a curved portion that curves inward in the vehicle width direction, and the exhaust control valve is provided in the curved portion. A seat supported by the frame;
A side cover supported by the frame and partially covering the lower part of the seat;
The motorcycle according to claim 2 , wherein the protruding portion is located on an inner side than an outer surface of the side cover . The motorcycle according to claim 3 , wherein the protruding portion is in front of the side cover and is visible from a side . Supported by the frame, comprising a step of supporting the sole of the driver,
The motorcycle according to claim 4 , wherein the projecting portion is provided near and inside the step . The exhaust control valve includes a disc-shaped valve body located in the exhaust pipe, a valve shaft protruding from the valve body on both sides in the radially outward direction, a pulley fixed to one end side of the valve shaft, and a motor. A wire that is driven forward and backward and wound around the pulley, and an adjustment portion that can adjust the length of the wire in the vicinity of the pulley;
The motorcycle according to any one of claims 1 to 5, wherein the protruding portion includes the pulley and the adjusting portion . The motorcycle according to claim 6, wherein the protrusion is concealed by a pulley cover . The motorcycle according to claim 7 , wherein the valve shaft is inclined with respect to a virtual vertical line so that the protruding portion faces outward and upward . The motorcycle according to claim 1, which is an on-off type .

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