JP6235546B2 - Motorcycle - Google Patents

Description

  The present invention relates to a motorcycle including an engine mounted on a vehicle body frame and having an exhaust port on the rear side of a cylinder portion, and an exhaust pipe connected to the exhaust port and extending toward the rear of the vehicle body.

  Patent document 1 discloses a motorcycle. The motorcycle includes an engine having an exhaust port on the rear surface side of the cylinder part. An exhaust pipe is connected to the exhaust port. A bent portion is formed in the exhaust pipe. The exhaust pipe extends rearward and upward toward the bent portion. The exhaust pipe descends in the direction of gravity from the bent portion. The length of the exhaust pipe is secured according to the formation of the bent portion.

JP 2009-51323 A

In Patent Document 1, since the exhaust pipe is closest to the occupant seat at the bent portion, the heat shield plate is disposed only between the bent portion and the occupant seat.
Thus, the spread of the heat shield is reduced as much as possible. However, in such a structure, the exhaust pipe must be separated from the occupant seat at a sufficient distance other than the bent portion, and a large space is required between the occupant seat and the fuel tank and the exhaust pipe. In particular, since the temperature of the exhaust pipe is the highest immediately after the exhaust port, other components cannot be disposed immediately above the exhaust pipe immediately after the exhaust port.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a motorcycle capable of bringing other components close to the exhaust pipe even immediately after the exhaust port.

According to the first aspect of the present invention, the engine includes an engine mounted on a vehicle body frame and having an exhaust port on the rear side of the cylinder portion, a cylinder unit, and a reserve tank extending rearward from the cylinder unit. a rear cushion coupled at one end to previous SL body frame at one end at the rear of the engine, is connected to the exhaust port, and an exhaust pipe extending toward the rear of the vehicle body through the right and left sides of the rear cushion, the engine And a heat shield disposed between the rear cushions and extending from above to cover the exhaust pipe, and the heat shield extends in the axial direction of the cylinder unit and covers the periphery of the cylinder unit. It has a wall, further wherein the vertical wall is motorcycle you also located between the exhaust pipe and the reserve tank is provided.

  According to the second aspect, in addition to the configuration of the first side, the engine has a pair of left and right exhaust ports facing a single cylinder, and the exhaust pipe is connected to the exhaust port, respectively. The rear cushion is composed of a pair passing through the left and right sides.

According to the third aspect, in addition to the configuration of the second side surface , the heat shield is supported on the left and right across a pair of left and right front frames that support the engine, and is disposed behind the fuel tank. The left and right sides are supported across a pair of left and right rear frames that support the passenger seat.

  According to the fourth aspect, in addition to the configuration of the third side surface, the heat shield includes a rear plate that at least partially covers the exhaust pipe on the left and right sides of the rear cushion, and the rear plate in front of the rear plate. And a front plate that is stacked from above and supported by the rear plate.

According to a fifth aspect, in addition to the configuration of the fourth aspect, wherein the vertical wall, as will be continuous in the circumferential direction of the rear cushion between the front Symbol rear cushion the exhaust pipe, the rear plate Ru provided.

According to a sixth aspect, in addition to the configuration of the fifth side surface, the exhaust tube has a different pipe diameter is formed from a plurality of tubing to be connected in series to each other.

According to a seventh aspect, in addition to the configuration of the sixth side surface, the exhaust pipe is replaced left and right cross each other at the rear of the reserve tank.

According to the eighth aspect, in addition to the configuration of the second side surface, a pair of exhaust mufflers connected to each of the exhaust pipes and approaching each other at the rear end rather than the front end, and the exhaust muffler are interconnected And a connecting stay.

According to the first aspect, the heat shield shields the radiant heat of the exhaust pipe immediately after the exhaust port having the highest temperature. The transfer of heat from the exhaust pipe upward is suppressed. In this way, a fuel tank and a fuel pump can be disposed immediately above the exhaust pipe. Furthermore, the vertical wall can protect the reserve tank of the rear cushion from the radiant heat of the exhaust pipe. As a result, it is possible to reduce the viscosity change accompanying the increase in the temperature of the reserve oil, and the cushion performance is improved.

  According to the second aspect, since the exhaust pipe shares a single cylinder, the diameter of each exhaust pipe can be reduced as compared with the case where one common exhaust pipe is disposed in the cylinder. . As a result, the exhaust pipe arrangement space is reduced on the left and right sides of the rear cushion. Piping restrictions are eased and the layout of the exhaust pipe is improved. The shape of the exhaust pipe can easily approach a linear shape, and an improvement in exhaust efficiency can be easily realized.

  According to the third aspect, when supporting the engine, the pair of left and right front frames are arranged side by side with a sufficient distance therebetween. Similarly, when supporting the occupant seat, the pair of left and right rear frames are arranged side by side with a sufficient distance therebetween. Therefore, the heat shield can have a sufficient extent in the left-right direction (vehicle width direction). In addition, the heat shield can be stably supported by the front frame and the rear frame.

  According to the fourth aspect, the front plate covers the exhaust pipe immediately after the exhaust port. The front plate can be easily removed from the vehicle body frame compared to the rear plate, and the engine can be easily exposed in accordance with the removal of the front plate. Thus, maintenance can be easily realized in the exhaust pipe immediately after the exhaust port.

According to the fifth aspect, the rear plate can protect the rear cushion from the radiant heat of the exhaust pipe. Ru can influence of heat is sufficiently suppressed with respect to the rear cushion.

According to the sixth aspect, it is possible to ensure the same exhaust characteristics while improving the productivity as compared with the case of setting the tapered pipe diameter continuously expanded with one pipe material.

According to the seventh aspect, the length of the exhaust pipe can be ensured to be longer than when the left and right exhaust pipes are linear and extend rearward. As a result, the exhaust performance is improved. In addition, the reserve tank can be protected and the rear of the vehicle can be downsized.

According to the eighth aspect, the exhaust muffler disposed at the rear part of the vehicle body approaches, whereby the rear part of the vehicle body is reduced in size. In addition, since the exhaust mufflers are connected to each other, the support rigidity of the exhaust muffler can be increased.

1 is a side view schematically showing an overall configuration of a motorcycle according to a first embodiment of the present invention. FIG. 3 is an enlarged partial side view showing the structure of the motorcycle in more detail. It is a partially broken top view which shows the structure of an engine and an exhaust pipe roughly. It is an enlarged partial plan view of a motorcycle showing the structure of a heat shield in detail. It is an expansion perspective view of a heat shield simple substance. It is an enlarged partial perspective view of a motorcycle showing the structure of a heat shield in detail. It is a figure which shows schematically the exhaust pipe of the motorcycle which concerns on 2nd Embodiment of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Here, the top, bottom, front, back, left and right of the vehicle body are defined based on the eyes of the occupant riding the motorcycle.

  FIG. 1 schematically shows a motorcycle 11 according to a first embodiment of the present invention. The motorcycle (saddle-ride type vehicle) 11 includes a body frame 12 and a cowl cover 13 attached to the body frame 12. The vehicle body frame 12 includes a head pipe 15 that supports the front fork 14 so as to be steerable, a pair of left and right main frames 16, 16 extending downward from the head pipe 15, and a lower side from the rear ends of the main frames 16, 16. And a pair of left and right pivot frames 17, 17. A front wheel WF is supported on the front fork 14 so as to be rotatable around an axle 18. A fuel tank 19 is mounted on the main frame 16 from above. The fuel tank 19 is supported by the main frame 16. Here, the main frame 16 and the pivot frame 17 cooperate to form a front frame.

  A swing arm 22 is connected to the pivot frame 17 via a support shaft 21 extending in the horizontal direction. The swing arm 22 is supported by the pivot frame 17 so as to be swingable in the vertical direction around the support shaft 21. A rear wheel WR is supported at the free end of the swing arm 22 so as to be rotatable around the axle 23.

  The cowl cover 13 includes a front cowl 24 that covers the head pipe 15 from the front, a pair of left and right center cowls 25 that are connected to the rear edge of the front cowl 24 and cover the space below the main frame 16 from the left and right sides. The lower cowl 26 is connected to the lower edge of the center cowl 25 and covers the space below the main frame 16 from below and a pair of left and right pivot frames 17, and from the pivot frame 17 in the space above the rear wheel WR. A rear cowl 27 extending rearward. The rear cowl 27 covers both the left and right sides of the occupant seat 28. As will be described later, a pair of left and right exhaust mufflers 31 are connected to the rear cowl 27.

  As shown in FIG. 2, an engine hanger 33 is fixed to the main frame 16. The engine hanger 33 extends downward from the main frame 16. An engine 34 is connected to the engine hanger 33 and the main frame 16 below the fuel tank 19. Thus, the engine 34 is mounted on the vehicle body frame 12. The engine 34 is covered from the side by the center cowl 25 and covered from below by the under cowl 26.

  The engine 34 includes a crankcase 35, a cylinder block 36 coupled to the crankcase 35, a cylinder head 37 that constitutes a cylinder part together with the cylinder block 36, and a head cover 38 coupled to the cylinder head 37. The crankcase 35 accommodates a crankshaft 41 that rotates about an axis extending parallel to the axle 23 of the rear wheel WR. The engine 34 is held in a tilted posture in which the cylinder axis C is tilted rearward around the axis of the crankshaft 41.

  The vehicle body frame 12 further includes a pair of left and right rear frames 42. Each rear frame 42 includes a seat rail 43 and an auxiliary frame 44. The seat rail 43 and the auxiliary frame 44 form a structure together with the pivot frame 17. The front end of the seat rail 43 is connected to the pivot frame 17. The front end of the auxiliary frame 44 is connected to the pivot frame 17 below the front end of the seat rail 43. The rear end of the auxiliary frame 44 is connected to the seat rail 43 at a position away from the pivot frame 17. The weight acting on the seat rail 43 is supported by the auxiliary frame 44. The occupant seat 28 is supported by the rear frame 42.

  A rear cushion 45 is installed between the vehicle body frame 12 and the swing arm 22. One end of the rear cushion 45 is connected to the vehicle body frame 12 behind the engine 34. The rear cushion 45 includes a cylinder unit 46. The upper end of the cylinder unit 46 is connected to the upper end of the pivot frame 17. The lower end of the cylinder unit 46 is connected to the swing arm 22 via a link mechanism 47. An oil damper and a spring are incorporated in the cylinder unit 46. In this way, the swing of the swing arm 22 with respect to the vehicle body frame 12 is restricted. Transmission of vibration from the rear wheel WR to the vehicle body frame 12 is suppressed. Here, the rear cushion 45 is positioned substantially at the center of the left and right of the vehicle body. The center axis of the rear cushion 45 coincides with the axis of the cylinder unit 46.

  The rear cushion 45 includes a reserve tank 48. The reserve tank 48 is connected to the upper part of the cylinder unit 46 and extends rearward and obliquely upward from the cylinder unit 46. Oil is accumulated in the reserve tank 48. The reserve tank 48 exchanges oil with the oil damper.

  A fuel pump 49 is connected to the engine 34. The fuel pump 49 is inserted into the fuel tank 19 from below. The fuel pump 49 is disposed in a space defined between the head cover 38 and the rear cushion 45. A supply pipe 51 of the fuel pump 49 is connected to the front surface of the cylinder head 37.

  An exhaust pipe 52 is connected to the cylinder head 37 of the engine 34. The exhaust pipe 52 is connected to the rear surface of the cylinder head 37 immediately below the fuel pump 49. The exhaust pipe 52 extends toward the rear of the vehicle body through the left and right sides of the rear cushion 45. The exhaust muffler 31 is connected to the exhaust pipe 52 behind the rear end of the rear frame 42.

  The exhaust pipe 52 is formed of a plurality of pipe materials 53a, 53b, 53c, 53d, and 53e connected in series with each other. In one exhaust pipe 52, the pipe materials 53a, 53b, 53c, 53d, and 53e have different diameters. That is, the inner diameters of the pipe members 53a, 53b, 53c, 53d, and 53e increase as the distance from the exhaust port increases, that is, as the exhaust muffler 31 approaches. The inner diameter may be constant for each of the individual pipe materials 53a, 53b, 53c, 53d, and 53e.

A heat shield 54 is disposed between the engine 34 and the rear cushion 45. The heat shield 54 extends in a space below the fuel pump 49 to a position covering the exhaust pipe 52 from above. Details of the heat shield 54 will be described later.

  An electrical component unit 56 is supported on the engine 34. The electrical component unit 56 includes, for example, an electrical component box 57 that houses a control unit of the electronic fuel injection device and other electrical components. The electrical component box 57 is molded from aluminum, for example, and has heat radiation fins 58 on the outer surface. Coupler 61 connected to the tip of wiring cable 59 is coupled to electrical component box 57.

  When the electric component unit 56 is attached, a metal electric component stay 62 is fixed to the engine 34. The electrical component stay 62 is screwed to the crankcase 35 and the cylinder head 37 of the engine 34. The electrical component box 58 is screwed to the electrical component stay 62.

  As shown in FIG. 3, the engine 34 is configured as a single cylinder type. The engine 34 has a pair of left and right exhaust ports 64 on the rear side of the cylinder part. A pair of exhaust ports 64 faces a single cylinder 65. An exhaust pipe 52 is connected to each exhaust port 64. The pair of exhaust pipes 52 is adjacent to the left and right immediately after the exhaust port 64 and bypasses the cylinder unit 46 and the reserve tank 48 of the rear cushion 45 while gradually separating from each other. In this way, the exhaust pipe 52 passes through the left and right sides of the rear cushion 45, approaches each other behind the reserve tank 48, and crosses and is switched left and right. The upper ends of the pivot frames 17 are close to each other and cooperate to support the upper end of the rear cushion 45.

  The pair of exhaust mufflers 31 are arranged in parallel on the left and right. The exhaust mufflers 31 approach each other at the rear end rather than the front end. One connection stay 66 is fixed to the two exhaust mufflers 31 in common. The connecting stay 66 connects the exhaust mufflers 31 to each other. The two mufflers 31 are closest to each other at the attachment position of the connecting stay 66. The connecting stay 66 is connected to the rear cowl 27. The connecting stay 66 may be screwed to the rear cowl 27.

  As shown in FIGS. 4 and 5, the heat shield 54 includes a rear plate 67 and a front plate 68. The rear plate 67 extends across the pair of left and right rear frames 42, that is, the auxiliary frames 44, and is supported on the left and right. The rear plate 67 extends in front of the rear cushion 45 across the left and right exhaust pipes 52 and extends along the horizontal plane from the left and right ends of the common flat plate part 67a. And an assigned individual flat plate portion 67b. An air layer is formed between the common flat plate portion 67 a and the individual flat plate portion 67 b and the exhaust pipe 52. In other words, the rear plate 67 faces the outer surface of the exhaust pipe 52 at a predetermined interval.

  The individual flat plate portion 67b continues from the common flat plate portion 67a along the corresponding exhaust pipe 52 and at least partially covers the exhaust pipe 52 on the left and right sides of the rear cushion 45. A hook piece 71 is integrally formed at the rear end of the individual flat plate portion 67b. The hook pieces 71 are individually engaged with the corresponding auxiliary frames 44. The two hook pieces 71 may be fitted into the auxiliary frame 44 in cooperation. Thus, the rear end of the rear plate 67 is fixed to the rear frame 42.

  The front plate 68 extends across a pair of left and right front frames, that is, the main frame 16, and is supported on the left and right. The front plate 68 is integrally formed with attachment pieces 72 that are respectively superimposed on the main frame 16 on the left and right. The front plate 68 is supported on the main frame 16 by a pair of left and right mounting pieces 72. The attachment piece 72 may be screwed to the main frame 16 or may be coupled to the main frame 16 with a wire wound around the attachment piece 72 and the main frame 16. The front plate 68 extends over the left and right exhaust pipes 52 in front of the rear plate 67. The front edge of the front plate 68 is abutted against the cylinder head 37. The rear end of the front plate 68 is supported by the rear plate 67. The front plate 68 is superposed on the rear plate 67 from above at the rear end. An air layer is secured between the front plate 68 and the exhaust pipe 52. In other words, the front plate 68 is opposed to the outer surface of the exhaust pipe 52 at a predetermined interval.

  Fixed pieces 74 are fixed to the left and right ends of the common flat plate portion 67a, respectively. The fixed piece 74 extends in the vertical direction from the surface of the common flat plate portion 67a. A vertical wall 73 is formed at the rear end of the common flat plate portion 67a so as to spread in a vertically rising posture. The vertical wall 73 continues from the common flat plate portion 67a to the individual flat plate portion 67b.

  As shown in FIG. 6, the fixing piece 74 is overlaid on the inner surface of the pivot frame (upper bracket) 17. The fixed piece 74 is fixed to the pivot frame 17 with a screw 75. The vertical wall 73 faces the rear cushion 45 between the rear cushion 45 and the exhaust pipe 52 continuously in the circumferential direction of the rear cushion 45, and faces the reserve tank 48 extending rearward from the cylinder unit 46 of the rear cushion 45. Adapted. An air layer is formed between the vertical wall 73 and the exhaust pipe 52. In other words, the vertical wall 73 faces the outer surface of the exhaust pipe 52 at a predetermined interval.

  The common flat plate portion 67a, the individual flat plate portion 67b, and the vertical wall 73 may be formed from one continuous material. For example, an aluminum plate can be used as the material. For example, a press machine may be used for molding. Here, the vertical wall 73 and the flat plate portions 67a and 67b are connected by a smooth curved surface, and the cooling performance of the rear cushion 45 is enhanced in accordance with a good wind-control action. Similarly, the front plate 68 may be formed from one material such as an aluminum plate.

  When the engine 34 is operated while the motorcycle 11 is traveling or in other situations, radiant heat is released from the exhaust pipe 52. The front plate 68 and the rear plate 67 shield the radiant heat of the exhaust pipe 52 immediately after the exhaust port 64 having the highest temperature. Heat transfer from the exhaust pipe 52 upward is suppressed. Thus, the fuel tank 19 and the fuel pump 49 can be disposed immediately above the exhaust pipe 52. High temperatures of the fuel tank 19 and the fuel pump 49 are suppressed. The fuel tank 19 can be as close to the ground as possible, and can contribute to lowering the center of gravity of the vehicle.

In the motorcycle 11, the exhaust pipes 52 are respectively connected to a pair of exhaust ports 64 sharing the cylinder 65 and are configured as a pair passing through the left and right sides of the rear cushion 45. Compared to the case where one common exhaust pipe is arranged in a single cylinder 65, the diameter of each exhaust pipe 52 can be reduced. As a result, the space for disposing the exhaust pipe 52 on each of the left and right sides of the rear cushion 45 is reduced. Vehicle width of the motorcycle 11 can be reduced. The restriction of the piping is relaxed, and the layout of the exhaust pipe 52 is improved. The shape of the exhaust pipe 52 can easily approach a linear shape, and an improvement in exhaust efficiency can be easily realized.

Front plate 68 of the heat shield 54 is supported Rihidari right spread across the main frame 16 of the right and left pair to support the engine 34. The rear plate 67 of the heat shield 54 extends across a pair of left and right rear frames 42 that support the passenger seat 28 disposed behind the fuel tank 19 and is supported on the left and right. When the engine 34 is supported, the pair of left and right main frames 16 are arranged in parallel with a sufficient interval. Similarly, when supporting the occupant seat 28, the pair of left and right rear frames 42 are juxtaposed with a sufficient distance therebetween. Therefore, the heat shield 54 can have a sufficient extent in the left-right direction (vehicle width direction). Moreover, the heat shield 54 can be stably supported by the main frame 16 and the rear frame 42.

  The rear plate 67 is fixed to the pivot frame 17 and the rear frame 42. The front plate 68 covers the exhaust pipe 52 immediately after the cylinder block 36 in front of the rear plate 67. The front plate 68 can be separated from the rear plate 67 and easily removed from the main frame 16, and the engine 34 can be easily exposed as the front plate 68 is removed. Thus, maintenance can be easily realized in the exhaust pipe 52 immediately after the exhaust port 64.

The vertical wall 73 of the rear plate 67 extends between the rear cushion 45 and the exhaust pipe 52 in the axial direction of the cylinder unit 46 of the rear cushion 45 and covers the periphery of the cylinder unit 46 of the rear cushion 45. Thus, the rear plate 67 can protect the rear cushion 45 from the radiant heat of the exhaust pipe 52. The influence of heat on the rear cushion 45 can be sufficiently suppressed.

Vertical wall 73, likewise, is also located between the reserve tank 48 extending rearwardly from the cylinder unit 46 of the rear cushion 45 and the exhaust pipe 52. Thus, the vertical wall 73 can protect the reserve tank 48 of the rear cushion 45 from the radiant heat of the exhaust pipe 52. As a result, the change in the viscosity of the reserve oil accompanying the temperature rise can be reduced , and the cushion performance is improved.

  The exhaust pipe 52 is formed of a plurality of pipe materials 53a to 53e. The pipe materials 53a to 53e have different pipe diameters. Therefore, it is possible to ensure the same exhaust characteristics while improving the productivity as compared with the case of setting the tapered pipe diameter continuously expanded with one pipe material.

  In the motorcycle 11, the exhaust pipe 52 intersects with each other behind the rear cushion 45 and is switched left and right. Compared with the case where the left and right exhaust pipes 52 are linear and extend rearward, it is possible to ensure a longer length of the exhaust pipes 52. As a result, the exhaust performance is improved. In particular, the rear cushion 45 and the reserve tank 48 are improved. Protection and downsizing of the rear part of the vehicle can be achieved.

  The exhaust muffler 31 is connected to each other by a connecting stay 66. When the exhaust muffler 31 disposed at the rear part of the vehicle body approaches, the rear part of the vehicle body is reduced in size. In addition, the support rigidity of the exhaust muffler 31 is increased by connecting the exhaust muffler 31 to each other.

  FIG. 7 schematically shows a motorcycle 11a according to a second embodiment of the present invention. In the second embodiment, the exhaust pipe 52 extends straight and rearward through the left and right sides of the rear cushion 45. Therefore, the length of the exhaust pipe 52 is reduced as compared with the motorcycle 11 according to the first embodiment. Other configurations are the same as those of the first embodiment.

DESCRIPTION OF SYMBOLS 11 ... Motorcycle (saddle type vehicle), 11a ... Motorcycle (saddle type vehicle), 12 ... Body frame, 16 ... Main frame as front frame, 17 ... Pivot frame as front frame, 19 ... Fuel Tank, 28 ... Crew seat, 31 ... Exhaust muffler, 34 ... Engine, 45 ... Rear cushion, 46 ... Cylinder unit, 48 ... Reserve tank, 52 ... Exhaust pipe, 53a ... Pipe material, 53b ... Pipe material, 53c ... Pipe material, 53d ... Pipe material, 53e ... pipe material, 54 ... heat shield, 64 ... exhaust port, 65 ... cylinder, 66 ... connection stay, 67 ... rear plate, 68 ... front plate, 73 ... vertical wall.

Claims (8)

An engine (34) mounted on the body frame (12) and having an exhaust port (64) on the rear surface side of the cylinder part;
Cylinder unit (46), and a reserve tank (48) extending rearward from the cylinder unit (46), said cylinder unit behind the previous SL body frame of said one end (46) engine (34) (12 ) A rear cushion (45) connected to
An exhaust pipe (52) connected to the exhaust port (64) and extending toward the rear of the vehicle body through the left and right sides of the rear cushion (45);
A heat shield (54) disposed between the engine (34) and the rear cushion (45) and extending from above to the exhaust pipe (52) ,
The heat shield (54) has a vertical wall (73) extending in the axial direction of the cylinder unit (46) and covering the periphery of the cylinder unit (46), and the vertical wall (73) is further provided in the reserve tank. (48) and a motorcycle, characterized that you also located between the exhaust pipe (52).   The motorcycle according to claim 1, wherein the engine (34) has a pair of left and right exhaust ports (64) facing a single cylinder (65), and the exhaust pipe (52) A motorcycle comprising a pair connected to the port (64) and passing through the left and right sides of the rear cushion (45).   The motorcycle according to claim 2, wherein the heat shield (54) is supported on the left and right across a pair of left and right front frames (16) that support the engine (34), and a fuel tank (19). The motorcycle is supported on the left and right across a pair of left and right rear frames (42) that support an occupant seat (28) disposed behind the vehicle.   The motorcycle according to claim 3, wherein the heat shield (54) includes a rear plate (67) at least partially covering the exhaust pipe (52) on the left and right sides of the rear cushion (45), and the rear plate. A motorcycle comprising: a front plate (68) which is superimposed on the rear plate (67) from above and supported by the rear plate (67) in front of (67). The motorcycle according to claim 4, wherein the vertical wall (73), so as to continuously in the circumferential direction of the rear cushion (45) between the pre-Symbol rear cushion (45) and said exhaust pipe (52) The motorcycle is provided on the rear plate (67) . The motorcycle according to claim 5 , wherein the exhaust pipe (52) is formed of a plurality of pipe materials (53a, 53b, 53c, 53d, 53e) having different pipe diameters and connected in series to each other. Motorcycle characterized by that. The motorcycle according to claim 6 , wherein the exhaust pipe (52) crosses each other at the rear of the reserve tank (48) and is switched between the left and the right.   The motorcycle according to claim 2, comprising a pair of exhaust mufflers (31) connected to each of the exhaust pipes (52) and approaching each other at a rear end rather than a front end, and the exhaust muffler (31). A motorcycle comprising a connecting stay (66) connected to each other.

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