JP4112887B2 - Motorcycle fuel tank mounting structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fuel tank mounting structure for a motorcycle that is suitable for suppressing foaming of fuel and further improving vehicle performance.
[0002]
[Prior art]
In a motorcycle, a fuel tank is generally attached to an upper part of a main frame constituting the body frame or a seat frame extending from the main frame to the rear of the body. As such a fuel tank mounting structure for a motorcycle, for example, the one described in Japanese Patent No. 3158428 “Motorcycle tank support structure” is known.
[0003]
In FIG. 7 of the same publication, the tank front mounting bracket 10 and the tank rear mounting are installed between the left and right seat pipes 5 and 5 (the same reference numerals are used in the same publication). And a tank support structure in which a fuel tank 60 is attached to the tank front mounting bracket 10 and the tank rear mounting bracket 12 via a front mounting rubber 70 and a rear mounting rubber 71, respectively. Has been.
[0004]
[Problems to be solved by the invention]
In the tank support structure as described above, the fuel tank 60 is attached to the seat pipes 5 and 5 so as to be able to swing left and right, and swinging of the vehicle body is reduced as the fuel tank 60 swings. As a result, the fuel largely moves inside the fuel tank 60, so that the fuel is easily bubbled.
[0005]
Further, since the fuel tank 60 is attached to the rear portion of the vehicle body, when the rear wheel side moves up and down greatly, the fuel tank 60 moves up and down accordingly, and the fuel inside the fuel tank 60 is greatly shaken. Therefore, the fuel becomes more easily bubbled.
[0006]
Furthermore, since the fuel tank 60 is attached to the rear part of the vehicle body, the center of gravity of the vehicle moves rearward, so that when the vehicle turns, it becomes difficult to draw a desired turning trajectory due to the centrifugal force acting on the center of gravity.
[0007]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to improve the fuel tank mounting structure of a motorcycle, thereby suppressing fuel foaming and further improving the turning performance of the vehicle.
[0008]
[Means for Solving the Problems]
To achieve the above object, a first aspect of the present invention provides a fuel tank mounting structure for a motorcycle in which a seat cowl serving as a seat is extended from a pair of left and right main frames to the rear of the vehicle body, and a fuel tank is attached to the seat cowl. in, provided with a top wall and left and right side walls and the bottom wall, and formed to be narrower as it goes the distance between the upper and lower walls of the seat cowl to the rear, further rubber provided on the inner side of the seat cowl, fuel By inserting the rear part of the tank into the seat cowl, the fuel tank is elastically supported via the rubber, and a protrusion is provided at the front of the fuel tank, and this protrusion is engaged with the seat cowl receiving part via the rubber piece. The fuel tank is elastically supported via the rubber piece, and the seat cowl is attached to the seat cowl mounting portion provided on the main frame, and the rear end of the seat cowl The fuel tank in the longitudinal direction by providing a rubber on the part, characterized in that the elastic support.
[0009]
By attaching the fuel tank to the inner side of the seat cowl via a rubber, in the present invention, the fuel tank can be arranged closer to the center of the vehicle body than in the conventional case where the fuel tank is attached to the rear part of the vehicle body. In addition, the fuel tank does not swing greatly, and the vibration transmitted to the fuel by the rubber can be suppressed, so that the foaming of the fuel can be suppressed.
[0010]
In addition, the heavy fuel tank can be arranged near the center of the entire length of the vehicle, and the influence of centrifugal force acting on the center of gravity when the vehicle turns can be reduced, so that the turning performance of the vehicle can be improved. it can.
[0011]
According to a second aspect of the present invention, the seat cowl has a U-shaped cross section, a bent portion is provided at the edge, a bottom surface provided with steps on the left and right walls is formed in a convex shape, and the fuel is provided on the seat cowl. The upper tank and the left and right walls of the rear part of the tank are equipped with upper and left and right side walls that come into contact with and support the rubber tank, and the fuel tank is fixed inside the seat cowl by hanging the bent part through the rubber on the step. it was it said.
[0012]
According to a third aspect of the present invention, a recess for passing a fuel pipe is provided on a side surface of the fuel tank .
The recess prevents the fuel pipe from projecting to the side of the fuel tank, so that it does not interfere with the operation and can prevent interference with others.
[0013]
Claim 4, the pair of left and right main frame to the rear of the vehicle body, extending a seat cowl which also serves as a seat frame, a fuel tank mounting structure for a motorcycle fitted with a fuel tank to the seat cowl, the seat cowl, the upper wall and left and right together and a side wall and a bottom wall, and formed to be narrower as it goes the distance between the upper and lower walls of the seat cowl to the rear, further rubber provided on the inner side of the seat cowl, rear seat cowl of the fuel tank The fuel tank is elastically supported through the rubber by inserting it into the seat, and a seat cowl mounting portion for mounting the seat cowl is provided on the upper surface of the main frame, a projection is provided on the seat cowl mounting portion, and the projection is locked to the projection. The engaging portion is provided at the front portion of the seat cowl.
[0014]
The locking part can be locked to the protrusion and the seat cowl can be temporarily fixed to the seat cowl mounting part. When the seat cowl is assembled to the main frame, the seat cowl to which the fuel tank is attached is held down. However, it is not necessary to perform the work while assembling the seat cowl easily.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.
FIG. 1 is a side view of a motorcycle adopting a fuel tank mounting structure according to the present invention. The motorcycle 10 has a pair of left and right main frames 12, 12 ((back side The main frame 12 is extended (not shown), and a V-type five-cylinder engine 13 is attached to the lower part of the main frames 12 and 12 and the swing arm 15 can swing up and down via a pivot shaft 14 at the rear of the main frames 12 and 12. The upper end of the rear cushion unit 16 is attached to the upper front portion of the swing arm 15 and the rear wheel 17 is attached to the rear end portion of the swing arm 15. The lower end of the rear cushion unit 16 is connected to the main frame via the link device 18. 12 is attached to the lower end of the rear portion of the cylinder 13 from the front cylinder head 21 of the engine 13 for each cylinder. The provided exhaust pipes 23 to 25 are extended rearward, these exhaust pipes 23 to 25 are connected to the right muffler 26 on the back side, and exhaust pipes 31 and 32 provided for each cylinder from the cylinder head 28 on the rear side of the engine 13. The exhaust pipes 31, 32 are connected to the left muffler 33 on the front side, and a seat cowl 34 that also serves as a seat is extended from the upper part of the main frames 12, 12, and the fuel is placed inside the seat cowl 34. This is a vehicle in which a tank 35 is attached and a fuel pump 36 is arranged in the fuel tank 35.
[0016]
Here, 41 is a front fork that is rotatably attached to the head pipe 11, 42 is a front wheel attached to the lower end of the front fork 41, 43 is a front fender that covers the front wheel 42, 44 is an upper cowl, 45 is a middle cowl, 46 Is a low cowl, 48 is a radiator, and 51 is a tank cover.
[0017]
FIG. 2 is a side view of the main part for explaining the fuel tank mounting structure according to the present invention. The seat cowl 34 is mounted on seat cowl mounting portions 55 (two on each of the left and right sides) provided on the main frame 12, and this seat cowl 34 is mounted. The state which attached the fuel tank 35 inside is shown. Reference numeral 56 denotes a protruding portion that protrudes from the front surface of the fuel tank 35, and 57 denotes a receiving portion that receives the protruding portion 56 via an L-shaped rubber 61 that is L-shaped in cross section.
[0018]
FIG. 3 is a first perspective view (partially sectional view) of the fuel tank according to the present invention. The fuel tank 35 accommodates a fuel pump 36 (see FIG. 1) in a pump accommodating portion 63 provided at the lower portion. A supply side pipe 64 for supplying fuel to the engine side from the fuel pump 36 to the front side of the vehicle body (the direction indicated by the white arrow (front) is the front side of the vehicle body, the same applies hereinafter) is extended, and fuel is supplied from the engine side. The return side pipe 65 for returning is extended to the inside.
[0019]
4 is a second perspective view of the fuel tank according to the present invention, as viewed from a side surface (side surface on the back side) different from the first perspective view shown in FIG.
The supply side pipe 64 and the return side pipe 65 of the fuel tank 35 pass through a recess 67 provided on the side surface of the front part of the fuel tank 35 from the front of the vehicle body, and the supply side pipe 64 passes above the rear part of the fuel tank 35, The fuel tank 35 passes through the wall surface and is connected to a fuel pump 36 (see FIG. 1) in the fuel tank 35. The return side pipe 65 extends into the fuel tank 35 through the wall surface in the recess 67.
[0020]
5 is a cross-sectional view taken along line 5-5 of FIG. 2, and shows a cross section of the rear portion of the fuel tank 35. FIG.
The fuel tank 35 is attached to the seat cowl 34 via a cushioning rubber 68. Steps 71 and 71 are provided on the left and right walls of the fuel tank 35, and the edge of the seat cowl 34 having a U-shaped cross section. The fuel tank 35 is fixed in the seat cowl 34 by providing the bent portions 72 and 72 to the stepped portions 71 and 71 via the rubber 68.
[0021]
6 is a cross-sectional view taken along line 6-6 of FIG. 2 and shows a cross section of the front portion of the fuel tank 35. FIG.
The fuel tank 35 is formed with a recess 67 for passing the supply side pipe 64 and the return side pipe 65 on the side surface. By this recess 67, the supply side pipe 64 and the return side pipe 65 are lateral to the fuel tank 35. Therefore, it does not interfere with driving and can prevent interference with others.
[0022]
FIG. 7 is a side view for explaining the lower arrangement of the fuel tank according to the present invention. A pump housing 63 is provided below the fuel tank 35, and the upper end 16a of the rear cushion unit 16 and the exhaust are provided below the fuel tank 35. It shows that the tubes 31 and 32 are arranged.
That is, when viewed from the side, the fuel pump 36, the rear cushion unit 16 and the exhaust pipes 31 and 32 housed in the pump housing 63 are almost overlapped on one straight line 74, and in particular, disposed at the rear part of the vehicle body. Except for the right muffler 26 (not shown), the left muffler 33, the swing arm 15, and the rear wheel 17 (not shown), the axle and rear of the front wheel 42 (see FIG. 1), for example, the center side of the vehicle body from the straight line 74. It shows that it has arrange | positioned at the vertical line 75 side which passes along the point which bisects the straight line which ties the axle shaft of the wheel | wheel 17 (refer FIG. 1). Reference numeral 76 denotes a bracket for attaching the upper end portion 16 a of the rear cushion unit 16 to the swing arm 15.
[0023]
FIG. 8 is a perspective view for explaining the lower arrangement of the fuel tank according to the present invention, as viewed from a position slightly shifted to the right side from the rear of the vehicle body.
The exhaust pipe 31 extends rearward and obliquely to the right from the left cylinder of the two rear cylinders of the V-type engine, and further extends substantially right below the swing arm 15.
Further, the exhaust pipe 32 extends rearward from the right cylinder of the two rear cylinders of the V-type engine, and further extends substantially right below the swing arm 15.
[0024]
FIG. 9 is a rear view for explaining the lower arrangement of the fuel tank according to the present invention. The pump housing 63 is protruded from the lower left portion of the fuel tank 35 and the exhaust pipes 31 and 32 are extended to the lower right side of the fuel tank 35. This shows that the upper end portion 16a of the rear cushion unit 16 is disposed between the pump housing portion 63 and the exhaust pipes 31 and 32.
[0025]
The procedure for assembling the fuel tank 35 described above will now be described.
FIG. 10 is a first operation view for explaining the fuel tank assembly procedure according to the present invention. The fuel tank 35 is inserted into the seat cowl 34 from the front of the seat cowl 34 in the direction of the arrow. At this time, the bent portion 72 of the seat cowl 34 guides the stepped portion 71 of the fuel tank 35.
[0026]
FIG. 11 is a second operation view for explaining the assembly procedure of the fuel tank according to the present invention. After the fuel tank 35 is inserted into the seat cowl 34, the L-shaped rubber 61 is attached to the receiving portion 57 as indicated by the arrow (1). The receiving portion 57 with the L-shaped rubber 61 is attached to the front portion of the seat cowl 34 as shown by the arrow (2), and the protruding portion 56 of the fuel tank 35 is received, and the fuel tank 35 is attached to the seat cowl 34. Is completed.
[0027]
Next, the seat cowl 34 to which the fuel tank 35 is attached is attached to the four seat cowl attachment portions 55 of the main frames 12 and 12 as indicated by arrows (3) and (3) , and the seat cowl to the main frame 12 is attached. Installation of 34 is completed.
[0028]
As described with reference to FIGS. 2 and 5 above, the present invention extends the seat cowl 34 also serving as a seat from the pair of left and right main frames 12 and 12 (the rear side reference numeral 12 is not shown) to the rear of the vehicle body. The fuel tank 35 is attached to the inside of the seat cowl 34 via a rubber 68.
[0029]
By attaching the fuel tank 35 to the inside of the seat cowl 34 via the rubber 68, in the present invention, the fuel tank 35 is more centrally located in the vehicle body (for example, compared to the case where the fuel tank is attached to the rear part of the vehicle body as in the prior art). It can be arranged on the vertical line 75 (see FIG. 7) side, the fuel tank 35 does not swing greatly, and vibration transmitted to the fuel by the rubber 68 can be suppressed, thereby suppressing the foaming of the fuel. it can.
[0030]
In addition, the heavy fuel tank 35 can be disposed near the center of the entire length of the motorcycle 10 (see FIG. 1), and the influence of centrifugal force acting on the center of gravity when the motorcycle 10 turns can be reduced. Therefore, the turning performance of the motorcycle 10 can be enhanced.
[0031]
Furthermore, by arranging the fuel tank 35 under the seat cowl 34, the space under the seat can be used effectively. Furthermore, for example, when the fuel tank is arranged on the upper part of the main frame, the shape of the upper part of the engine is restricted. In the present invention, there is no fuel tank above the engine. The degree of freedom of arrangement can be increased.
[0032]
FIG. 12 is a side view showing another embodiment of the fuel tank mounting structure for a motorcycle according to the present invention, and seat cowl is provided on the upper surface of each of the main frames 12, 12 (the main frame 12 on the back side is not shown). Attachment portions 81 and 82 (rear side seat cowl attachment portions 81 and 82 are not shown) are attached, and seat cowls 83 that also serve as seats are not shown in the four seat cowl attachment portions 81, 81, 82, and 82, respectively. The state where it attached with the bolt is shown. Reference numeral 85 denotes a receiving portion attached to the front portion of the seat cowl 83 in order to receive the front portion of the fuel tank 35 when the fuel tank 35 is attached to the seat cowl 83.
[0033]
FIG. 13 is an enlarged view of a part A in FIG. 12 and shows a seat cowl attaching part 81.
The seat cowl attachment portion 81 includes a frame side attachment portion 87 attached to the main frame 12 and a cowl side attachment portion 88 to which the seat cowl 83 is attached. The cowl side attachment portion 88 includes a boss portion 92 with a bolt hole 91 opened. The front of the vehicle body from the boss portion 92 (the white arrow in the figure indicates the front of the vehicle body; the same applies hereinafter). Specifically, the front surface of the main frame 12 is extended from the boss portion 92 to the front of the vehicle body. And a protrusion 93.
[0034]
The seat cowl 83 is a component provided with an engaging portion 95 that engages with the projection 93 of the seat cowl attaching portion 81 on the inner surface.
The locking portion 95 of the seat cowl 83 is continuous with the front upper edge 96 of the seat cowl 83 and the front end of the front upper edge 96 and is bent in a V shape with respect to the front upper edge 96. And a protrusion 97.
[0035]
14 is a cross-sectional view taken along line 14-14 of FIG. 13, and shows a state in which the locking portion 95 of the seat cowl 83 is locked to the protrusion 93 of the seat cowl mounting portion 81. FIG.
In a state where the locking portion 93 is locked to the protrusion 93, the entire seat cowl mounting portion 81 is covered with the seat cowl 83, and the locking portion 95 of the seat cowl 83 is provided on the inner surface of the seat cowl 83. Therefore, when the driver sits on the seat cowl 83, the driver does not get in the way and the appearance is not impaired.
[0036]
The procedure for assembling the seat cowl 83 described above will be described next.
FIG. 15 is an operational view of another embodiment of the fuel tank mounting structure for a motorcycle according to the present invention, and shows the procedure for assembling the seat cowl 83.
The front end of the seat cowl 83 to which the fuel tank is attached, that is, the locking portion 95 of the seat cowl 83 is lowered from above the seat cowl mounting portion 81 as indicated by an arrow, and the front protrusion 97 of the locking portion 95 is moved to the seat cowl. The locking portion 95 is locked to the protrusion 93 by being moved to the lower side of the protrusion 93 of the mounting portion 81. The back side locking portion 95 is similarly locked to the back side projection 93.
[0037]
Then, the rear part of the seat cowl 83 is also lowered, and the rear part of the seat cowl 83 is aligned with the left and right seat cowl attachment parts 82 (see FIG. 2).
In this state, the seat cowl 83 is temporarily fixed to the main frame 12 inclined downward and the operator removes his hand from the seat cowl 83 and has two positions on the both sides of the seat cowl 83 from the side of the vehicle. The bolts are screwed into the respective bolt holes 91 of the seat cowl mounting portions 81 and 82 through the mounting holes 83a that are opened one by one, and the seat cowl 83 is permanently fixed to the seat cowl mounting portions 81 and 82, whereby the seat to the main frame 12 is secured. The assembly of the cowl 83 is completed.
[0038]
As described above with reference to FIGS. 12 and 13, in the present invention, the seat cowl mounting portion 81 for mounting the seat cowl 83 is provided on the upper surfaces of the left and right main frames 12. The seat cowl 83 is provided with a locking portion 95 that is provided on the seat cowl 83.
[0039]
The seat 95 can be temporarily fixed to the seat cowl mounting portion 81 by locking the locking portion 95 to the protrusion 93, and the weight of the fuel tank 35 attached when the seat cowl 83 is assembled to the main frame 12. There is no need to work while pressing the large seat cowl 83, and the seat cowl 83 can be easily assembled.
[0040]
Therefore, for example, by adopting the structure of the present invention, a seat cowl that has been assembled by two people so far can be assembled by one person, and work efficiency can be improved.
[0041]
Further, as shown in FIGS. 2, 5, 10 and 11, the present invention applies the seat cowl 34 to the upper wall, the left and right side walls, and the lower wall of the rear portion of the fuel tank 35 via rubber 68. An upper wall, left and right side walls, and a lower wall that are in close contact with each other are provided, and the space between the upper wall and the lower wall of the seat cowl 34 is formed so as to narrow toward the rear.
[0042]
The seat cowl 34 and the fuel tank 35 can be coupled to each other simply by inserting the fuel tank 35 from the rear to the rear of the seat cowl 34, and the rubber 68 supports a wide area in the upper, lower, left, and right sides. Therefore, it is not necessary to partially increase the strength of the fuel tank 35.
[0043]
In the embodiment of the present invention, the stepped portion 71 of the fuel tank 35 is guided by the bent portion 72 of the seat cowl 34 in FIG. A groove may be provided, and the fuel tank 35 may be attached to the seat cowl 34 by inserting the bent portion 72 into the groove. Thereby, the capacity of the fuel tank 35 can be increased.
In FIG. 13, the protrusion 93 is extended forward of the vehicle body. However, the present invention is not limited to this, and the protrusion may be extended to the side of the vehicle body.
[0044]
【The invention's effect】
The present invention exhibits the following effects by the above configuration.
The fuel tank mounting structure for a motorcycle according to claim 1 includes an upper wall, left and right side walls, and a lower wall in the seat cowl, and the distance between the upper wall and the lower wall of the seat cowl becomes narrower toward the rear. In addition , a rubber is provided on the inside of the seat cowl, the rear part of the fuel tank is inserted into the seat cowl to elastically support the fuel tank via the rubber, and a protrusion is provided at the front of the fuel tank. Is engaged with the seat cowl receiving portion via the rubber piece to elastically support the fuel tank via the rubber piece, the seat cowl is attached to the seat cowl mounting portion provided on the main frame, and the rear end of the seat cowl Since the fuel tank is elastically supported also in the front-rear direction by providing a rubber on the inside, the fuel tank is more More can be placed on the vehicle body center side, without increasing the oscillating fuel tank, also it is possible to suppress the vibration transmitted to the fuel in the rubber, it is possible to suppress the foaming of the fuel.
[0045]
In addition, the heavy fuel tank can be arranged near the center of the entire length of the vehicle, and the influence of centrifugal force acting on the center of gravity when the vehicle turns can be reduced, so that the turning performance of the vehicle can be improved. it can.
[0046]
The fuel tank mounting structure for a motorcycle according to claim 2 is such that the seat cowl has a U-shaped cross section, a bent portion is provided at the edge, and a lower surface provided with step portions on the left and right walls is convex. The seat cowl is provided with an upper wall and left and right side walls that are in contact with and supported by the upper wall and the left and right walls of the rear part of the fuel tank via rubber, and a bent portion is hung on the step part via the rubber. A fuel tank was fixed in the seat cowl.
[0047]
According to the fuel tank mounting structure for a motorcycle of claim 3, since the recess for passing the fuel pipe is provided on the side surface of the fuel tank, the fuel pipe does not protrude to the side of the fuel tank due to the recess. In addition, interference with others can be prevented.
[0048]
The fuel tank mounting structure for a motorcycle according to claim 4 includes an upper wall, left and right side walls, and a lower wall in the seat cowl, and the distance between the upper wall and the lower wall of the seat cowl becomes narrower toward the rear. In addition , a rubber is provided inside the seat cowl, the rear part of the fuel tank is inserted into the seat cowl to elastically support the fuel tank via the rubber, and the seat cowl for attaching the seat cowl to the upper surface of the main frame Since the mounting part is provided, the seat cowl mounting part is provided with a projection, and the locking part that locks the projection is provided at the front part of the seat cowl. The seat cowl can be temporarily fixed, and when assembling the seat cowl to the main frame, it is necessary to work while holding the relatively heavy seat cowl with the fuel tank attached. Without the assembly of the seat cowl it can be easily performed.
[Brief description of the drawings]
FIG. 1 is a side view of a motorcycle adopting a fuel tank mounting structure according to the present invention. FIG. 2 is a side view of an essential part illustrating a fuel tank mounting structure according to the present invention. First perspective view (partial sectional view)
4 is a second perspective view of a fuel tank according to the present invention. FIG. 5 is a sectional view taken along line 5-5 in FIG. 2. FIG. 6 is a sectional view taken along line 6-6 in FIG. FIG. 8 is a perspective view illustrating the lower arrangement of the fuel tank according to the present invention. FIG. 9 is a rear view illustrating the lower arrangement of the fuel tank according to the present invention. FIG. 11 is a first action diagram illustrating the fuel tank assembly procedure according to the present invention. FIG. 11 is a second action diagram illustrating the fuel tank assembly procedure according to the present invention. FIG. 13 is an enlarged view of a part A in FIG. 12; FIG. 14 is a cross-sectional view taken along line 14-14 in FIG. 13; Operational diagram of another embodiment of fuel tank mounting structure [Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Motorcycle, 12 ... Main frame, 34 ... Seat cowl, 35 ... Fuel tank, 55 , 81 ... Seat cowl attaching part, 56 ... Projection part, 57 ... Receiving part, 61 ... Rubber piece (L-shaped rubber), 64 , 65 ... Fuel pipe (supply side pipe, return side pipe), 67 ... recess, 68 ... rubber, 71 ... stepped part, 72 ... bent part, 83 ... seat cowl, 93 ... projection, 95 ... locking part.

Claims (4)

In a fuel tank mounting structure of a motorcycle in which a seat cowl that also serves as a seat frame is extended from a pair of left and right main frames to the rear of the vehicle body, and a fuel tank is mounted on the seat cowl.
The seat cowl includes an upper wall, left and right side walls, and a lower wall, and the distance between the upper wall and the lower wall of the seat cowl is narrowed toward the rear, and a rubber is further provided inside the seat cowl. Provided,
By elastically supporting the fuel tank via the rubber by inserting the rear portion of the fuel tank into the seat cowl,
Providing a protrusion at the front of the fuel tank, and elastically supporting the fuel tank via the rubber piece by engaging the protrusion with a receiving portion of the seat cowl via the rubber piece,
The seat cowl is attached to a seat cowl mounting portion provided on the main frame,
A fuel tank mounting structure for a motorcycle, characterized in that the fuel tank is elastically supported also in the front-rear direction by providing the rubber inside the rear end of the seat cowl.   The seat cowl has a U-shaped cross section, a bent portion is provided at an edge, a bottom surface provided with steps on left and right walls is formed in a convex shape, and a rear portion of the fuel tank is provided on the seat cowl. An upper wall and left and right side walls that abut on and support the upper wall and the left and right walls via the rubber are provided, and the fuel tank is fixed in the seat cowl by hanging the stepped portion via the rubber. The fuel tank mounting structure for a motorcycle according to claim 1, wherein the fuel tank mounting structure is used.   The fuel tank mounting structure for a motorcycle according to claim 1 or 2, wherein a recess for passing a fuel pipe is provided on a side surface of the fuel tank. In a fuel tank mounting structure of a motorcycle in which a seat cowl that also serves as a seat frame is extended from a pair of left and right main frames to the rear of the vehicle body, and a fuel tank is mounted on the seat cowl.
The seat cowl includes an upper wall, left and right side walls, and a lower wall, and the distance between the upper wall and the lower wall of the seat cowl is narrowed toward the rear, and a rubber is further provided inside the seat cowl. Provided,
By elastically supporting the fuel tank via the rubber by inserting the rear portion of the fuel tank into the seat cowl,
A seat cowl mounting portion for mounting the seat cowl is provided on the upper surface of the main frame, a projection is provided on the seat cowl mounting portion, and a locking portion for locking to the projection is provided on the front portion of the seat cowl. A fuel tank mounting structure for a motorcycle characterized by the above.

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