There is provided a vehicle body frame of a straddle-type vehicle. A tank rail extends rearward from a head pipe at an upper side of a power unit. A body frame has a pair of side frame parts extending downward from a rear end side of the tank rail, an upper coupling part couples upper parts of the side frame parts, and a lower coupling part couples lower parts of the pair of side frame parts. Front and rear mount parts support the power unit. Swing arm support parts are provided in the side frame parts. A link member connecting part connects a link member configured to couple the swing arm and a rear cushion each other. The rear mount part is formed at a front part of the lower coupling part, and the link member connecting part is formed at a rear part of the lower coupling part.

What is disclosed is a drive device for a bicycle driven by an electric motor, having a main frame having a swing arm bearing, and a rear linkage element arranged at the swing arm bearing. The drive device has a pedal crank as a first drive for providing a first drive force, having a first drive shaft, a center electric motor as a second drive for providing a second drive force, and an output element having an output shaft, configured to receive the first and/or second drive forces and transfer same to the bicycle wheel to be driven. The center axis of the output shaft is radially distanced from the center axis of the first drive shaft and the output shaft is arranged relative to the swing arm bearing such that a radial distance between the center axis of the swing arm bearing and the center axis of the output shaft is smaller than a radial distance between the center axis of the swing arm bearing and the center axis of the first drive shaft.

What is disclosed is a drive device for a bicycle driven by an electric motor, having a main frame having a swing arm bearing, and a rear linkage element arranged at the swing arm bearing. The drive device has a pedal crank as a first drive for providing a first drive force, having a first drive shaft, a center electric motor as a second drive for providing a second drive force, and an output element having an output shaft, configured to receive the first and/or second drive forces and transfer same to the bicycle wheel to be driven. The center axis of the output shaft is radially distanced from the center axis of the first drive shaft and the output shaft is arranged relative to the swing arm bearing such that a radial distance between the center axis of the swing arm bearing and the center axis of the output shaft is smaller than a radial distance between the center axis of the swing arm bearing and the center axis of the first drive shaft.

A driving system for an electric vehicle comprises a motor (3) comprising a first output shaft (11) and a gearbox (17) comprising a second output shaft (27) attachable to a wheel (33) of the electric vehicle. The first output shaft (11) is capable of driving the second output shaft (27) to rotate by engagement of gears of the gearbox (17). The first output shaft (11) is hollow, and the second output shaft (27) extends through the first output shaft (11) so that the second output shaft (27) is disposed coaxially with the first output shaft (11). An electric vehicle comprising the driving system is disclosed. The driving system is possible to improve the balancing, the passing ability and the visual appearance of the electric vehicle.

A bicycle may include a front triangle and a rear suspension system that couples the front triangle to a rear wheel and is dampened by at least one shock absorber. The rear suspension system includes a six-bar linkage having two ternary links separated from each other by one or more binary links, such that the two ternary links do not share a common joint. One of the ternary links may comprise a chain stay. In some examples, the other ternary link may comprise the front triangle. In some examples, the other ternary link may comprise a rocker arm coupling a seat stay link to the shock absorber.

A bicycle may include a front triangle and a rear suspension system that couples the front triangle to a rear wheel and is dampened by at least one shock absorber. The rear suspension system includes a six-bar linkage having two ternary links separated from each other by one or more binary links, such that the two ternary links do not share a common joint. One of the ternary links may comprise a chain stay. In some examples, the other ternary link may comprise the front triangle. In some examples, the other ternary link may comprise a rocker arm coupling a seat stay link to the shock absorber.

The present disclosure relates to a suspension arrangement for a vehicle, the vehicle comprising a wheel arranged on a swing arm adapted to be pivotable relative a vehicle part about a swing arm pivot point, the suspension arrangement comprising: a shock absorber adapted to be arranged relative the vehicle part and the swing arm so that a first mounting member provides a first pivot point and a second mounting member provides a second pivot point, a pivot point adjustment device adapted for enabling position adjustment of the first pivot point and/or the second pivot point relative the swing arm to change a steady-state position of the shock absorber relative the swing arm in response to a load change. A vehicle and method of adjustment is also disclosed.

The present disclosure relates to a suspension arrangement for a vehicle, the vehicle comprising a wheel arranged on a swing arm adapted to be pivotable relative a vehicle part about a swing arm pivot point, the suspension arrangement comprising: a shock absorber adapted to be arranged relative the vehicle part and the swing arm so that a first mounting member provides a first pivot point and a second mounting member provides a second pivot point, a pivot point adjustment device adapted for enabling position adjustment of the first pivot point and/or the second pivot point relative the swing arm to change a steady-state position of the shock absorber relative the swing arm in response to a load change. A vehicle and method of adjustment is also disclosed.

A high performance motorcycle having a frame, engine suspension, and rear wheel drive system that enables rider foot positioning close to the longitudinal centerline of the motorcycle and an overall aerodynamic profile. The engine suspension, centering and damping system allows for lateral movement while damping vibration and unwanted oscillations. The rear wheel drive includes a driven pulley axially disposed on a rear wheel axle, a drive pulley configured to receive motive output from the motorcycle engine, an idler pulley disposed above a line between the axes of rotation of the drive pulley and the rear wheel axle, and a belt or chain disposed around and operatively connecting the drive pulley, the driven pulley and the idler pulley, wherein the idler pulley and the drive pulley configured so as to provide substantially constant tension to a belt or chain over the range of travel of the rear suspension.

A high performance motorcycle having a frame, engine suspension, and rear wheel drive system that enables rider foot positioning close to the longitudinal centerline of the motorcycle and an overall aerodynamic profile. The engine suspension, centering and damping system allows for lateral movement while damping vibration and unwanted oscillations. The rear wheel drive includes a driven pulley axially disposed on a rear wheel axle, a drive pulley configured to receive motive output from the motorcycle engine, an idler pulley disposed above a line between the axes of rotation of the drive pulley and the rear wheel axle, and a belt or chain disposed around and operatively connecting the drive pulley, the driven pulley and the idler pulley, wherein the idler pulley and the drive pulley configured so as to provide substantially constant tension to a belt or chain over the range of travel of the rear suspension.