A motorcycle frame including a left side frame member, a right side frame member, and a steering head member positioned along a longitudinal center plane of the frame between the left and right side frame members. The steering head member includes a steering head portion defining a steering axis. A plurality of fastener joints are established between the steering head member, the left side frame member, and the right side frame member, the plurality of fastener joints positioned rearward of the steering head portion. A fastener joint, separate from the plurality of fastener joints, is established rearward of the plurality of fastener joints between the steering head and the left side frame member. A fastener joint, separate from the plurality of fastener joints, is established rearward of the plurality of fastener joints between the steering head and the right side frame member.

An electric vehicle includes a battery having a housing. The housing includes a rear side which is defined as a side facing away from a forward travelling direction of the electric vehicle. The electric vehicle further includes a frame, a motor having a housing, and a pivot shaft stack-up assembly co-aligned along a pivot shaft axis. The pivot shaft stack-up assembly includes first and second portions of the frame, a swingarm extending therebetween, and an idler bracket. A shock mount is integral with the battery housing. The shock mount extends from the rear side of the battery housing. The battery housing is configured as a stressed chassis member in which each of the motor housing, the frame, and the pivot shaft stack-up assembly are aligned thereof. The shock mount provides a path along which a load is directed to the battery housing.

A two-wheeled vehicle includes a frame assembly, a plurality of ground-engaging members for supporting the frame assembly, and a cooling assembly positioned below a head portion of the frame assembly and intermediate vertically-extending frame tubes of the frame assembly. A lower end of the cooling assembly is coupled to a lower end of the vertically-extending frame tubes, and an upper end of the cooling assembly is frictionally retained at an upper end of each of the vertically-extending frame tubes.

A two-wheeled vehicle includes a frame assembly, a plurality of ground-engaging members for supporting the frame assembly, and a cooling assembly positioned below a head portion of the frame assembly and intermediate vertically-extending frame tubes of the frame assembly. A lower end of the cooling assembly is coupled to a lower end of the vertically-extending frame tubes, and an upper end of the cooling assembly is frictionally retained at an upper end of each of the vertically-extending frame tubes.

Provided is a seat frame for a saddled vehicle capable of increasing the coupling rigidity at the separable rear end and having aesthetic aspect. A seat frame of a vehicle body frame includes a front part fixed to the vehicle body frame and a rear part that can be disconnected from the front part, the front part and the rear part being separated at a rear part of the vehicle body. The front part and the rear part are fixed with a fastening member that engages from the inside of the vehicle width direction. The front part has a hollow rear end, and the rear part includes a solid engagement part at the front end. The fastening member as a bolt penetrates through the lateral wall at the rear end to be screwed with the engagement part inserted into the rear end. The rear part includes the engagement part and a pipe member to be connected to a rear part of the engagement part.

According to one aspect of the present invention there is provided an adjustable mechanism for connecting two or more shafts, including at least a first shaft having an external surface with an outer diameter and a second shaft which is hollow at a first end, wherein a spring is anchored to the first end of the second shaft, the spring having an inner diameter of similar dimensions to the outer diameter of the first shaft, the spring configured such that when a force is applied to the spring its inner diameter is greater than the outer diameter of the first shaft so that the second shaft can move over the first shaft to a desired position relative to the first shaft, and when the force is no longer applied to the spring it is biased to return to its original inner diameter to bear against the external surface of the first shaft.

According to one aspect of the present invention there is provided an adjustable mechanism for connecting two or more shafts, including at least a first shaft having an external surface with an outer diameter and a second shaft which is hollow at a first end, wherein a spring is anchored to the first end of the second shaft, the spring having an inner diameter of similar dimensions to the outer diameter of the first shaft, the spring configured such that when a force is applied to the spring its inner diameter is greater than the outer diameter of the first shaft so that the second shaft can move over the first shaft to a desired position relative to the first shaft, and when the force is no longer applied to the spring it is biased to return to its original inner diameter to bear against the external surface of the first shaft.

A multi-wheeled vehicle (e.g., bicycle, tricycle, quadricycle) frame includes a head tube, a seat tube, a top tube, a brace tube, and a down tube. The seat tube is disposed away from the head tube. The top tube is pivotally coupled to the seat tube and pivotally coupled to the head tube. The brace tube is pivotally coupled to the seat tube and pivotally coupled to the head tube. The down tube is pivotally coupled to the seat tube and pivotally coupled to the head tube.

A main frame has a pair of left and right main rails that respectively include left and right front portions, left and right middle portions, and left and right rear end portions. One end portion of the left main rail and one end portion of the right main rail are connected to each other, whereby a head pipe is formed. A first coupling member is attached to the left and right front portions with a plurality of the first bolts, so that the front portions are coupled to each other. A second coupling member is attached to the left and right middle portions with a plurality of the second bolts, so that the middle portions are coupled to each other. A third coupling member is attached to the left and right rear portions with a plurality of the third bolts, so that the rear portions are coupled to each other.

A main frame has a pair of left and right main rails that respectively include left and right front portions, left and right middle portions, and left and right rear end portions. One end portion of the left main rail and one end portion of the right main rail are connected to each other, whereby a head pipe is formed. A first coupling member is attached to the left and right front portions with a plurality of the first bolts, so that the front portions are coupled to each other. A second coupling member is attached to the left and right middle portions with a plurality of the second bolts, so that the middle portions are coupled to each other. A third coupling member is attached to the left and right rear portions with a plurality of the third bolts, so that the rear portions are coupled to each other.