The present application relates to the field of electric scooter, and more particularly to a foldable electric scooter and a manufacture method of the same. Electric scooter 10 includes front wheel assembly 20, front fork assembly 30, headset assembly 50, handlebar assembly 60, throttle controller 70, gooseneck assembly 80, main body assembly 90, standing platform 100, drive train assembly 110, and rear wheel assembly 120. One purpose of the present application is to provide an electric scooter that has a flexible design, whose rear tire revolves inwardly and handlebar assembly collapses to minimize the whole volume of the electric scooter for facilitating transportation and storage. Another purpose of the present invention is to provide a method of manufacturing the electric scooter.

A motorcycle includes: a front end subassembly including a fork, a suspension support, a shaft, an axle, and a wheel, wherein the suspension support is coupled to the fork, wherein the shaft is rigid, rectilinear, and extends from the suspension support such that the shaft is (1) parallel to the fork and (2) transverse to the axle, wherein the wheel rotates about the axle; and a seat subassembly including a passenger seat, a gas tank, and a passage, wherein the gas tank is positioned between the passenger seat and the passage, wherein the shaft extends through the passage and thereby solely couples the front end subassembly to the seat subassembly such that the front end subassembly is able to steer the seat subassembly.

A motorcycle includes: a front end subassembly including a fork, a suspension support, a shaft, an axle, and a wheel, wherein the suspension support is coupled to the fork, wherein the shaft is rigid, rectilinear, and extends from the suspension support such that the shaft is (1) parallel to the fork and (2) transverse to the axle, wherein the wheel rotates about the axle; and a seat subassembly including a passenger seat, a gas tank, and a passage, wherein the gas tank is positioned between the passenger seat and the passage, wherein the shaft extends through the passage and thereby solely couples the front end subassembly to the seat subassembly such that the front end subassembly is able to steer the seat subassembly.

A swing arm structure for a saddle riding electric vehicle includes a swing arm pivotably supported by a vehicle body frame at a pivot section and extending rearward from the pivot section to rotatably support a rear wheel, an electric motor that drives the rear wheel, and a speed reduction mechanism that reduces an output of the electric motor and transmit the output to the rear wheel, and a housing installed separately from the swing arm and attached to the swing arm, wherein the speed reduction mechanism and the housing are configured as a speed reduction mechanism unit in which the speed reduction mechanism is attached to the housing and integrated with the housing.

A swing arm structure for a saddle riding electric vehicle includes a swing arm pivotably supported by a vehicle body frame at a pivot section and extending rearward from the pivot section to rotatably support a rear wheel, an electric motor that drives the rear wheel, and a speed reduction mechanism that reduces an output of the electric motor and transmit the output to the rear wheel, and a housing installed separately from the swing arm and attached to the swing arm, wherein the speed reduction mechanism and the housing are configured as a speed reduction mechanism unit in which the speed reduction mechanism is attached to the housing and integrated with the housing.

A bicycle can include a suspension system with a shock absorber. The shock absorber can have a sag position which can be adjustable. Sag refers to the amount of movement experienced by the suspension under a static load, such as that of the weight of a rider. Methods and systems to set sag can include at least one valve in fluid communication with a gas chamber of the shock absorber. In some embodiments, the at least one valve can be used to automatically set the sag position based on an individual's weight and riding position.

A bicycle can include a suspension system with a shock absorber. The shock absorber can have a sag position which can be adjustable. Sag refers to the amount of movement experienced by the suspension under a static load, such as that of the weight of a rider. Methods and systems to set sag can include at least one valve in fluid communication with a gas chamber of the shock absorber. In some embodiments, the at least one valve can be used to automatically set the sag position based on an individual's weight and riding position.

A bicycle can include a suspension system with a shock absorber. The shock absorber can have a sag position which can be adjustable. Sag refers to the amount of movement experienced by the suspension under a static load, such as that of the weight of a rider. Methods and systems to set sag can include at least one valve in fluid communication with a gas chamber of the shock absorber. In some embodiments, the at least one valve can be used to automatically set the sag position based on an individual's weight and riding position.

A bicycle can include a suspension system with a shock absorber. The shock absorber can have a sag position which can be adjustable. Sag refers to the amount of movement experienced by the suspension under a static load, such as that of the weight of a rider. Methods and systems to set sag can include at least one valve in fluid communication with a gas chamber of the shock absorber. In some embodiments, the at least one valve can be used to automatically set the sag position based on an individual's weight and riding position.

A hold down system for a vehicle is described. The vehicle comprises a chassis biased by a suspension in a first direction away from a supporting surface. The hold down system comprises a base for attachment to a linkage arm of the suspension. The hold down system can further include a pin slidably coupled with the base, where the pin is extensible in a second direction away from the base. The pin can be biased in a third direction opposite the second direction and toward the base. The hold down system can also include a latching mechanism for attachment to the vehicle. The latching mechanism can be configured to latch the pin when the pin is extended in the second direction away from the base, and to release the pin in the third direction toward the base when the chassis is deflected in a fourth direction opposite the first direction.