A high performance synchronous transmission to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, comprising on the crankshaft a centrifugal clutch, for the automatic engagement of the first speed above a predetermined rotation regime, and a driving pulley apt to transmit the motion through a subsequent kinematic chain, is provided with a coupling between crankshaft and driving pulley which connects them directly, by determining with its own engagement the exclusion of said centrifugal clutch, said coupling being controlled in disengagement when a control lever is in active position.

An aspect of the invention provides a folding bicycle (10) comprising a first frame section (12a); a second frame section (12b) movably mounted to the first frame section so that the first and second frame sections may be moved relative to each other from an unfolded position to a folded position; a front wheel (40) mounted to the first frame section; a rear wheel (42) mounted to the second frame section; a chainset (48) mounted to the first frame section comprising a pair of crank arms (48a) fixed to a bottom bracket axle (74) and defining a crank shaft axis orthogonal to the first and second frame sections; wherein, the bottom bracket axle comprises first and second axle members (74a) extending orthogonally to the crank arm axis and a bridge portion (74b) connecting the first and second axle members, the bottom bracket axle defining a void between the first and second axle members, and wherein, when in a folded position the front and rear wheels are positioned at least partially within the void defined between the first and second axle members.

A multi-stage transmission bicycle, comprises: a transmission plate which rotates with the pedals and has a plurality of transmission gear teeth formed concentrically on the surface and driving gear teeth on the outer peripheral side; a transmission unit having an input shaft, which is coupled to the driving teeth and is for receiving transmission of the rotational force, a ring gear, which rotates by means of the input shaft, an output shaft, which is disposed inside the ring gear, has a sun gear, and is coupled to the rear wheel, pinion gears, which are coupled to the sun gear and inner gear teeth of the ring gear, a carrier, which couples the pinion gears, and a driving gear which is gear coupled to the carrier; and a number-of-revolutions changing module for changing the rotational direction of the driving gear and the number of revolutions of the driving gear.

A multi-stage transmission bicycle, comprises: a transmission plate which rotates with the pedals and has a plurality of transmission gear teeth formed concentrically on the surface and driving gear teeth on the outer peripheral side; a transmission unit having an input shaft, which is coupled to the driving teeth and is for receiving transmission of the rotational force, a ring gear, which rotates by means of the input shaft, an output shaft, which is disposed inside the ring gear, has a sun gear, and is coupled to the rear wheel, pinion gears, which are coupled to the sun gear and inner gear teeth of the ring gear, a carrier, which couples the pinion gears, and a driving gear which is gear coupled to the carrier; and a number-of-revolutions changing module for changing the rotational direction of the driving gear and the number of revolutions of the driving gear.

A high performance synchronous transmission (1) to be used aboard a motorcycle for transmitting the motion generated by an engine to a driving wheel, between a crankshaft (2) and a hub shaft parallel therebetween and perpendicular to the median plane of the motorcycle, providing a driving pulley (13) arranged at the crankshaft and a driven pulley (17) arranged at a hub shaft (75) and connected kinematically to an input clutch (40), the two pulleys (13, 17) being connected by a belt (18) so as to guarantee a substantially synchronous transmission, the belt (18) being equipped with a tensioning device (30) having a tensioning wheel (34) pressed on a branch of the belt (18), said tensioning wheel (34) being assembled on an eccentric element (32) the position thereof is variable, wherein the tensioning device (30) has a fixed pin (31), integral to a fixed portion of the transmission (1), whereon a circular and eccentric supporting element (32) is assembled, which forms a circular periphery whereon a bearing (33) is assembled, whereon, in turn, a pressing wheel (34) is assembled, positioned so as to exert a pressure between the outer periphery thereof (35) on the outer face (36) of the belt (18).

A bicycle drive system includes a front face gear, a rear face gear, a drive shaft, and a front roller-toothed gear assembly coupled to the first end of the drive shaft, and a rear roller-toothed gear assembly coupled to the second end of the drive shaft. Both the front roller-toothed gear assembly and the rear roller-toothed gear assembly include one or more roller elements. The roller-toothed gear assemblies are advantageous in ensuring the bicycle drive system is highly efficient, and is only minimally or not at all affected by dirt, water, contaminants, or other foreign matter typically experienced in un-clean riding conditions.

Provided is a motorcycle including a frame, a front ground-engaging wheel, rear ground-engaging wheel and a steering assembly. The steering assembly includes handlebars, an upper steering stem, a lower steering stem and a lever assembly intermediate the upper steering stem and the lower steering stem and wherein the steering assembly is operably connected to the front ground-engaging wheel.

Provided is a motorcycle including a frame, a front ground-engaging wheel, rear ground-engaging wheel and a steering assembly. The steering assembly includes handlebars, an upper steering stem, a lower steering stem and a lever assembly intermediate the upper steering stem and the lower steering stem and wherein the steering assembly is operably connected to the front ground-engaging wheel.

In an aspect, a self-balancing two-wheeled vehicle is provided, having a body, and first and second wheels rotatably coupled to the body. The second wheel has at least one lateral roller rotatable about an axis that is one of oblique and orthogonal to a rotation axis of the second wheel. At least one motor is coupled to the second wheel to control rotation of the second wheel and the at least one lateral roller. At least one sensor is coupled to the body to generate orientation data therefor. A control module is coupled to the at least one motor to control operation thereof at least partially based on the orientation data generated by the at least one sensor.

Provided is a motorcycle including a frame, a front ground-engaging wheel, rear ground-engaging wheel and a steering assembly. The steering assembly includes handlebars, an upper steering stem, a lower steering stem and a lever assembly intermediate the upper steering stem and the lower steering stem and wherein the steering assembly is operably connected to the front ground-engaging wheel.