FIELD OF INVENTION
[0001] The present invention relates to a two wheeled vehicle, and more particularly, but not exclusively to a fuel tank mounting for the two wheeled vehicle.
BACKGROUND OF INVENTION
[0002] Generally, a two wheeled vehicle includes a fuel tank which is present over the front portion of a frame unit of the two wheeled vehicle to store fuel in it. The fuel tank comprises of two portions in general, one is front and the other one is rear, where the rear portion of fuel tank is having a fuel tank mounting flange which is mounted on a cross member bracket disposed rigidly on a pair of rear tubes. A vehicle frame unit includes a head tube, a main tube, a down tube, a pair of rear tubes extending in rear direction from the main tube, and a pair of side tubes.
[0003] A dampener member is present in between the fuel tank mounting flange and the cross member bracket. Typically, the fuel tank is mounted over the cross member bracket. A pair of fastener member is used to mount the fuel tank mounting over the cross member bracket through the dampener member.
BRIEF DESCRIFHON OF DRAWINGS
[0004] The detailed description of the present subject matter is described with reference to the accompanying figures. Same numbers are used throughout the drawings to reference like features and components.
[0005]' Fig. 1 illustrates a left side view of an exemplary vehicle, in accordance with an embodiment of the present subject matter.
[0006] Fig. 2 illustrates a left side view of the exemplary frame unit assembly, in accordance with an embodiment of the present subject matter.
[0007] Fig. 3 illustrates an exploded view of a fuel tank mounting over a cross member bracket in accordance with an embodiment of the present subject matter.

[0008] Fig. 4a illustrates a top view of a dampener member and a cross member bracket in accordance with an embodiment of the present subject matter.
[0009] Fig. 4b illustrates a top view of a cross member bracket in accordance with an embodiment of the present subject matter.
[00010] Fig. 5 illustrates a left side view of a fuel tank mounting flange mounted over a pair of rear tubes in accordance with an embodiment of the present subject matter.
[00011] Fig. 6 illustrates a top view of the cross member bracket in accordance with an embodiment of the present subject matter.
DETAILED DESCRIPTION
[00012] Various features and embodiments of the present invention here will be discernible from the following further description thereof, set out hereunder. In the ensuing exemplary embodiments, the vehicle is a two wheeled vehicle with a straddle type frame colloquially called motorcycle. However it is contemplated that the disclosure in the present invention may be applied to any two wheeled vehicle such as motor-cycle or moped having a similar frame structure without defeating the spirit of the present subject matter. The detailed explanation of the constitution of parts other than the present invention which constitutes an essential part has been omitted at suitable places.
[00013] A two wheeled vehicle having a vehicle longitudinal axis comprises of a frame unit, an engine, a suspension system, a wheel assembly, a fender assembly, a steering assembly, a seat assembly, an electronic system, a body panel assembly, a chain drive, an exhaust assembly, a headlamp assembly, a tail-lamp assembly, and a fuel tank system. Out of which the frame unit is an essential part of the two wheeled vehicle. The frame unit includes a head tube disposed in a front portion of the two wheeled vehicle, a main tube extending gradually from the head tube in a rearward direction and takes a gentle curve towards the bottom near to the middle portion of

the two Wheeled vehicle, a down tube extending downwards from the head tube, a pair of rear tubes extending in the rearward direction from the main tube, and a pair of side tubes extending from a free end of the main tube to join the pair of rear tubes at a point located at predetermined distance from a starting point of the pair of rear tubes. The internal combustion engine is mounted between the ends of the down tube and the main tube and acts as a stressed member of the part of the frame assembly. Apart from the internal combustion engine, the frame unit provides supports for parts like the fuel tank system, the suspension system, the seat assembly, the wheel assembly, the electronic systems, the body panel assembly, the exhaust assembly, the steering assembly, the tail-lamp assembly, and the headlamp assembly.
[00014] The fuel tank system includes a fuel tank and a fuel tank cap, a shut-off valve, a fuel line system, a filter system, a carburettor and an air filter, and an intake manifold from the carburettor to the internal combustion engine. The fuel tank comprises of two portions in general, a front fuel tank portion which is disposed over the main tube towards the head tube and a rear fuel tank portion which is mounted over the pair of rear lubes, where the rear portion of fuel tank is having a fuel tank mounting flange which is supported on a cross member bracket rigidly attached to a pair of rear tubes which is a part of the frame unit.
[00015] A dampener member comprises of a portion made of a resilient material and a portion made of a hard material. The dampener member is disposed in between the fuel tank mounting flange and the cross member bracket to serve two purposes. Firstly, to reduce the effect of vibrations coming out from the internal combustion engine over the frame unit and further on the fuel tank. Secondly, to protect the swaying of the fuel tank in a long fun of the two wheeled vehicle when high stress is continuously inflicted on the fuel tank mounting by a rider through a seat.
[00016] Further, during the assembly of the fuel tank mounting flange over the cross member bracket through the dampener member, the dampener member has a minimal surface contact with the surface of the fuel tank mounting flange then the effect of lateral vibrations coming out from the internal combustion engine on the

fuel tank is very high and which results as a crack on the fuel tank and in some cases the swaying of the fuel tank occurs. The cross member bracket is having a profile which is gradually tapered from the vehicle width direction at the end and in between it is straight and parallel to a perpendicular line over the vehicle longitudinal axis. With the above-mentioned profile there is only one way to assemble the cross member bracket over the pair of rear tubes where the dampener member has a maximum surface contact with the surface of the fuel tank mounting flange. Although, when the cross member bracket is welded from the opposite direction to the profile, there is more gap at an one end of the cross member bracket and less gap at an other end of the cross member bracket during welding because the pair of rear tubes of the frame unit are converging from a rear end of the two wheeled vehicle to a front end of the vehicle in top view. This leads to poor strength, weld on weld and stiffness of the welded cross member bracket over the pair of rear tubes which causes a crack on the cross member bracket during vehicle usage. Hence, the present subject matter provides a solution for above-said problems and other problems. Hence, the present subject matter is to provide the maximum surface contact between the dampener member and the fuel lank mounting flange for reducing the effect of vibrations over the fuel tank, for minimizing the chances of cracks on the fuel tank mounting flange and to eliminate the swaying of the fuel tank.
[00017] Conventionally, the above-said problem and other problems are solved during the assembly of the dampener member and the cross member bracket over the two-wheeled vehicle by ensuring that the entire dampener member should have the maximum surface contact with the surface of the fuel tank mounting flange to overcome the effect of vibrations over the fuel tank and to eliminate the swaying of the fuel tank. In general, to achieve that the maximum surface contact, during the assembly of the two-wheeled vehicle the cross member bracket should be welded over the pair of rear tubes only in the profile direction to get an optimum gap between the pair of rear lubes and the cross member bracket. But still there is a possibility during assembly of the dampener member and the cross member bracket

over the two-wheeled vehicle that the dampener member does not have the maximum surface contact with the fuel tank mounting flange and especially when the cross member bracket is welded over the pair of rear tubes from the opposite direction of the profile.
[00018] In order to solve the above-said problems and other problems, the present subject matter is providing a center longitudinal axis parallel to the vehicle longitudinal axis, and a center lateral axis present perpendicularly to the center longitudinal axis on the dampener member. Also, a locating member is disposed over the dampener member and a receiving member is located over the cross member, bracket. The locating member is positioned radially outwards from an intersection point of the center longitudinal axis and the center lateral axis in a manner to match with corresponding said receiving member provided on the cross member bracket for ensuring the maximum surface contact between the dampener member and the fuel tank mounting flange. In addition to this, the presence of the protrusion over the cross-member bracket ensures the maximum surface contact between the dampener member and the fuel tank mounting flange. Finally, with the above-stated arrangement the effect of vibrations over the fuel tank is reduced and the chance of swaying of the fuel tank is eliminated. In the present subject matter, for reducing the effect of vibrations over the fuel tank, for minimizing the chances of cracks on the fuel tank mounting flange and to eliminate the chances of swaying of the fuel tank the locating member can also be disposed over the cross member bracket and the receiving member can also be located over (he dampener member for ensuring the maximum surface contact between the dampener member and the fuel tank mounting flange.
[00019] With the present subject matter having, the locating member and receiving member on the dampener member and the cross member bracket respectively, the assembly of the dampener member and the cross member bracket over the vehicle is hassle free and in all situations the maximum surface contact between the dampener member and the fuel tank mounting flange is achieved.

[00020] The aforesaid and other advantages of the present subject matter would be described in greater detail in conjunction with the figures in the following description.
[00021] Fig. 1 illustrates a left side view of a two-wheeled vehicle (100) typically called a motorcycle, in accordance with an embodiment of the present subject matter. A frontward direction is indicated by an arrow F, and a rearward direction indicated by an arrow R provided in the top center of first figure. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R).ln an embodiment; the two-wheeled vehicle (100) of the present subject matter includes an internal combustion (1C) engine (110). The vehicle further includes a front wheel (112), a rear wheel (122), a frame unit, a fuel tank (103) and seat (106). The frame unit includes a head pipe (101), a main tube (102), a down tube (116), and a pair of rear tubes (104). The head pipe (101) supports a steering shaft (121) with two brackets - upper bracket (not shown) and lower bracket (147) at each end. Two telescopic front suspension (144) (only one shown) is attached to the lower bracket (147) on which is supported the front wheel (112). The upper portion of the front wheel (112) is covered by a front fender (119) mounted to the lower portion of a front fork of the telescopic front suspension (144). A handlebar assembly (121) is fixed to upper bracket and can rotate to both sides. A headlamp assembly (139) is disposed in the front portion of the head tube (101). An exhaust assembly (not shown) is attached to the internal combustion engine (110) at a front end of the internal combustion engine (110) and extends rearwards from one side of the two wheeled vehicle in the opposite direction of the chain (in the present embodiment, the exhaust assembly is disposed towards the right side of the vehicle in the width direction). Down tube (116) is disposed in front of the IC engine (110) and stretches slantingly downward from head pipe (101). Main tube (102) is located above the internal combustion engine (110) and stretches rearward from head pipe (101) and connects to the rear of the internal combustion engine (110). The pair of rear lubes (104) is joined near to the middle of the main tube (102) and stretches rearward. The pair of rear tubes (104), which are joined to the main tube (102) and

stretching rearward to support a seat assembly (106) disposed above these pair of rear tubes. Generally, two rear wheel suspensions (113) (only one shown) are arranged between rear swing arm. A tail lamp assembly (108) is disposed on the rear end of the seat assembly (106). A grab rail (107) is also provided on the rear of the seat assembly (106). Rear wheel (122) is arranged below seat assembly (106) and rotates by the driving force of the internal combustion engine (110) transmitted through a chain drive (114) from the internal combustion engine (110). A rear fender (109) is disposed above the rear wheel (122) and attached to the pair of rear tubes (104).
[00022] Fig. 2 illustrates a left side view of the exemplary frame unit assembly (150) in accordance with an embodiment of the present subject matter. A frontward direction is indicated by an arrow F, and a rearward direction indicated by an arrow R provided in the top center of second figure. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R). In an embodiment; the frame unit assembly (150) comprises of a head tube (101), a main tube (102), a down tube (116), a pair of rear tubes (104), and a cross member bracket (120). The head tube (101) is disposed towards the front portion of the frame unit, wherein the main tube (102) extends gradually downwardly in rearward direction from the head tube (101). The down tube (116) is extending downwards from the head tube (101), the pair of left and right rear lubes ( 104a, 104b) extending in rear direction from the main tube, and the cross member bracket (120) positioned on the pair of rear lubes (104). In present embodiment, a receiving member (115) is located over the cross member bracket (120) with a protrusion (111) positioned in a rearward direction (R) of the two-wheeled vehicle (100) for indicating the orientation of said cross member bracket (120) during vehicle parts assembly. Also, the pair of rear tubes (104) is having a diverging portion extending from the main tube in rearward direction (R) of the two-wheeled vehicle (100) and a parallel portion in rearward direction (R) of the two-wheeled vehicle (100) connected by a bent portion (143).

[00023] Fig. 3 illustrates an exploded view of a fuel tank mounting over a cross member bracket in accordance with an embodiment of the present subject matter. A frontward direction is indicated by an arrow F, and a rearward direction indicated by an arrow R provided in the top center of third figure. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R).In an embodiment; the fuel tank (103) includes a rear fuel tank portion (103b) with a fuel tank mounting flange (140). The fuel tank mounting flange (140) comprises of a left side hole (142) and right side hole (132) for inserting a pair of fastener member (163) separately. The dampener member (130) is having a similar profile like the fuel tank mounting flange (140) for providing the maximum surface contact between the dampener member (130) and the fuel lank mounting flange (140). The dampener member (130) comprises of a resilient surface portion (130a) disposed on a top surface (not shown) of a back plate portion (130b) of said dampener member (130). The resilient surface portion (130a) comprises a resilient surface lower Left (146) and a resilient surface lower Right (147) for providing a way to the pair of fastener member (163) separately up to the cross member bracket (121). On the back plate portion (130b) a locating member (105) is present to make sure that the dampener member (130) is having the maximum surface contact with the fuel tank mounting flange (140) which is present at the rear portion of fuel tank (103b). The cross member bracket (121) is disposed on the bent portion (143) of the pair of rear tubes (104). The cross member bracket (121) is having a profile which is gradually tapered from the vehicle width direction at the end and in between the profile is parallel to a line which is perpendicular to the vehicle longitudinal axis (F-R), and comprises of a left bracket hole (186) and a right bracket hole (185) which are present at the straight end of the cross member bracket (121), and the receiving member (115). Over the cross member bracket (121) the receiving member (115) is positioned in such a manner that the receiving member (115) comes in contact with the locating member (105) to ensure that the dampener member (130) has the maximum surface contact with the fuel tank mounting flange (140). After arranging the fuel tank mounting flange (141), the dampener member (130), and the cross member bracket (121) over

the pair of rear tubes (104), the pair of fastener member (163) is inserted from the left side and right side holes (142,132) of the fuel tank mounting flange (140) passing from the resilient surface lower Left and Right (146,147) up to the left bracket and right bracket holes (186,185) of the cross member bracket (121). With above written arrangement the maximum surface contact between the dampener member (130) and the fuel tank mounting flange (141) is achieved. Jn other possible arrangement, the receiving member (115) is disposed on said dampener member (130), and the locating member (105) is disposed on said cross member bracket (121) in a manner to match therein. Since in present embodiment, the focus is on to resolve the issue of vibration failure and to isolate the internal combustion (1C) engine (110) induced the frame unit assembly (150) vibrations from the occupant on the fuel tank (103). Hence, there is need to have the rear mounting of the fuel tank (103) as much away as feasible from the internal combustion (IC) engine (110) center of gravity of the two-wheeled vehicle (100). However, extending the fuel tank (103) length has manufacturing and packaging difficulties in addition to aesthetics. This also leads to center of gravity shift of the two-wheeled vehicle (100) to rear side thereby causing detrimental effect on the handling performance of the two-wheeled vehicle (100). Thus the location and position of the dampener member (130) is optimum when it is at optimum distance from the internal combustion (LC) engine (110) and at optimum position under the fuel tank mounting flange (141).
[00024] Fig. 4a illustrates a top view of a dampener member and a cross member bracket in accordance with an embodiment of the present subject matter. Arrows provided in the top right of fourth figure depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Left denotes leftward direction, an arrow Right denotes righlward direction. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R). In an embodiment; the dampener member (130) comprises of the resilient surface portion (130a) disposed on a top surface (131) of the back plate portion (130b) of the dampener member (130). The resilient surface portion (130a) comprising of the resilient surface lower Left (146)

and the resilient surface lower Right (147). The dampener member (130) also includes a center longitudinal axis (Y-Y) parallel to the vehicle longitudinal axis (F-R), and a center lateral axis (X-X) present perpendicularly to the center longitudinal axis (Y-Y). On the back plate portion (130b) the locating member (105) is positioned radially outwards from an intersection point of the center longitudinal axis (Y-Y) and the center lateral axis (X-X) in a manner to match with corresponding said receiving member (115) provided on the cross member bracket (121) shown in the Fig. 4b. In present embodiment, the locating member (105) positioned over center longitudinal axis (Y-Y) and at an offset positioned from the center lateral axis (X-X) in a manner to match with the corresponding receiving member (115) provided on the cross member bracket (121) shown in the Fig. 4b. In other way, the locating member (105) can be positioned over center lateral axis (X-X) and at an offset position from the center longitudinal axis (Y-Y) in a manner to match with the corresponding receiving member (115) provided on the cross member bracket (121). The locating member (105) is made of a material selected from a group of natural rubber, synthetic rubber and plastic for supporting the dampening effect while placing the fuel tank ( not shown) over the cross member bracket (121) shown in the Fig. 4b. In present embodiment, said locating member (105) is of cylindrical shape with a cylindrical diameter of 25mm and cylindrical height of 14 mm. Also, cylindrical height of the locating member (105) would be extended up-lo 50 mm for achieving the optimum surface contact between the dampener member (130) and the fuel tank mounting flange (not shown).
[00025] Fig. 4b illustrates a top view of a cross member bracket in accordance with an embodiment of the present subject matter. Arrows provided in the top right of fourth figure depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Left denotes leftward direction, an arrow Right denotes rightward direction. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R). In an embodiment; the cross member bracket (121) is having a profile which is gradually tapered from the vehicle width direction at the end and in

between it is straight and parallel to a perpendicular line over the vehicle longitudinal axis (F-R), and comprises of a left bracket hole (186) and a right bracket hole (185) which are present at the straight end of the cross member bracket (121), and the receiving member (115). Over the cross member bracket (121) the receiving member (115) is positioned in such a manner that it conies in contact with the locating member (105) to make sure that the dampener member (130) has the maximum surface contact with the fuel lank mounting flange (not shown).
[00026] Fig. 5 illustrates a left side view of a fuel tank mounting flange mounted over a pair of rear lubes in accordance with an embodiment of the present subject matter. A frontward direction is indicated by an arrow F, and a rearward direction indicated by an arrow R provided in the top center of fifth figure. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R). In an embodiment; the rear fuel tank portion (103b) includes the fuel tank mounting flange (140) which is mounted over a cross member bracket (120) comprises of a lop surface (149) and the receiving member (not shown) and the cross member bracket (120) is disposed on the bent portion (143) of the pair of rear tubes (104) (only left one is shown) through a welding process. Then the pair of fastener member (163) (only left one is shown) is inserted after meeting the locating member (not shown) and the receiving member (not shown) for providing the maximum surface contact to the dampener member (130) with the fuel tank mounting flange (140). At Ihe same time, over the cross member bracket (120) ihe protrusion (111) extending in a perpendicular direction from the vehicle longitudinal axis (F-R) for indicating Ihe wrong position of the rear fuel tank portion (103b) during vehicle parts assembly. In present embodiment, the protrusion (111) is in S shaped where only a one-third part (Ilia) of the S shaped protrusion (111) is extended in a perpendicular direction from the vehicle longitudinal axis (F-R) and a remaining two-third part (111b) of the S shaped protrusion (111) is below to the top surface (149) of the cross member bracket (120). The one-third part (Ilia) of the S shaped protrusion (111) is rectangular in shape with height of 10 mm and width of 7 mm. Further, the height of the one-third part (Ilia) of the S shaped protrusion (111)

is extended up-to 30 mm. The S shaped protrusion (111) is made of a sheet metal material and rigidly attached with the cross-member bracket (120) for resisting the load coming through the rear fuel tank portion (103b). With the presence of the protrusion (111) over the cross member bracket (120), the rear fuel tank portion (103b) cannot rest properly over the cross member bracket (120) from either sides of the cross member bracket (120). So, there is only one way to assemble the rear fuel tank portion (103b) over the cross member bracket (120) in which the rear fuel tank portion (103b) can rest properly over the cross member bracket (120) for ensuring the maximum surface contact between the dampener member (130) and the fuel tank mounting flange (not shown) is achieved.
[00027] Fig. 6 illustrates a lop view of the cross member bracket in accordance with an embodiment of the present subject matter. A frontward direction is indicated by an arrow F, and a rearward direction indicated by an arrow R provided in the top center of sixth figure. The vehicle is extending from the front direction to the rear direction along the vehicle longitudinal axis (F-R). Jn an embodiment; the cross member bracket (120) is located over the pair of rear tubes (104). The cross member bracket (120) comprises a frontward edge (120b) along frontward direction F the two-wheeled vehicle (100) and a rearward edge (120a) along rearward direction R the two-wheeled vehicle (100). The cross member bracket (120) is having a profile which is gradually tapered from the vehicle width direction at the end and in between it is straight and parallel to a perpendicular line over the vehicle longitudinal axis (F-R), and comprises of the left bracket hole (186) and the right bracket hole (185) which are present at the straight end of the cross member bracket (120), the protrusion (111) which is on the rearward edge (120a) of the cross member bracket (120), and the receiving member (115). With the presence of all above-mentioned parts over the cross member bracket (120) the probability of wrong assembly of the fuel tank (not shown) over the pair of rear tubes (104) is null and through such arrangement the dampener member (not shown) is having the maximum surface contact with the fuel tank mounting flange (not shown) for reducing the effect of vibrations coming out of the engine over the fuel tank (not

shown), for minimizing the chances of cracks on the fuel tank mounting flange (not shown) and to eliminate the chances of swaying of the fuel tank (not shown).
[00028] While preferred embodiments of the present subject matter have been described above, it is to be understood that variations and modifications will be apparent to those skilled in the art without departing the scope and spirit of the present subject matter.

We claim:
1. A two-wheeled vehicle (100) comprising:
a frame unit (150) extending from a front portion to a rear portion along a vehicle longitudinal axis (F-R), said frame unit (150) comprising:
a head tube (101) disposed in a front portion of the two-wheeled
vehicle (100),
a main tube (102) extending gradually from the head tube (101)
in rearward direction,
a down tube (116) extending downwards from the head tube (101),
a pair of rear tubes (104) extending in rear direction from the
main tube (102), and
a cross member bracket (120,121) positioned on the pair of rear
tubes (104);
a fuel tank (103)disposed over the main tube (102) of the frame unit (150) and the pair of rear tubes (104), said fuel tank (103) includes a fuel lank mounting flange (140) configured to secure the fuel tank (103) on the cross member bracket (120,121); and
a dampener member (130) is disposed between the fuel tank mounting flange (140) and the cross member bracket (120,121), said dampener member (130) comprising:
a center longitudinal axis (Y-Y) parallel to the vehicle
longitudinal axis (F-R), and
a center lateral axis (X-X) present perpendicularly to the center
longitudinal axis (Y-Y);

wherein,
the cross member bracket (120,121) comprises a receiving member (115) and said dampener member (130) comprising of a locating member (105), said locating member (105) positioned radially outwards from an intersection point of the center longitudinal axis (Y-Y) and the center lateral axis (X-X) in a manner to match with corresponding said receiving member (115) provided on the cross member bracket (120,121).
2. The two-wheeled vehicle (100) as claimed in claim 1, wherein
said locating member (105) positioned over the center longitudinal axis (Y-Y) and at an offset position from the center lateral axis (X-X) in a manner to match with the corresponding receiving member(115) provided on the cross member bracket (120,121).
3. The two-wheeled vehicle (100) as claimed in claim 1, wherein
said locating member (105) positioned over the center lateral axis (Y-Y) and at an offset position from the center longitudinal axis (Y-Y) in a manner to match with the corresponding receiving member (115) provided on the cross member bracket(120,121).
4. The two-wheeled vehicle (100) as claimed in claim 1, wherein
said receiving member (115) is disposed on said dampener member (130), and wherein said locating member (105) is disposed on said cross member bracket (120,121) in a manner to match therein.
5. The two-wheeled vehicle (100) as claimed in claim I, wherein
said locating member (105) is made of a material selected from a group of natural rubber, synthetic rubber and plastic.

6. The two-wheeled vehicle (100) as claimed in claim 1, wherein
the dampener member( 130) includes a resilient surface portion (130a) disposed over a top surface (131) of a back plate portion (130b) of said dampener member (130).
7. The two-wheeled vehicle (100) as claimed in claim 1, wherein
said locating member (105) includes height varying in the range of 10-50 mm.
8. The two-wheeled vehicle (100) as claimed in claim I, wherein
the cross member bracket (120,121) is disposed on a bent portion (143) of the pair of rear tubes (104).
9. A two-wheeled vehicle (100) comprising:
a frame unit (150) extending from a front portion to a rear portion along a vehicle longitudinal axis (F-R), said frame unit (150) comprising:
a head tube (101) disposed in a front portion of the two-wheeled
vehicle (100),
a main tube (102) extending gradually from the head tube (101)
in rearward direction,
a down tube (116) extending downwards from the head lube
(101),
a pair of rear tubes (104) extending in rear direction from the
main tube (102), and
a cross member bracket (120,121) positioned on the pair of rear
tubes (104) and comprises a frontward edge (120b) and a
rearward edge (120a); wherein,
the cross member bracket (120) comprises at least a protrusion (111) on the frontward edge (120b) or on the rearward edge (120a) of the cross member bracket (120), and the protrusion (111) is extending in a

perpendicular direction from the two-wheeled vehicle (100) longitudinal axis (F-R).
10. The two-wheeled vehicle (100) as claimed in claim 9, wherein
the protrusion (111) is disposed on the rearward edge (120a) of the cross member bracket (120) and a one-third part (11 la) of the protrusion (111) has height within the range of 10-30 mm.