A rear drive transmission system for a motorcycle includes a driving wheel, a center wheel, and a driven wheel. The center wheel includes a transmission wheel A and a transmission wheel B that are coaxially arranged. The transmission wheel A is fixedly connected to an opposite surface of the transmission wheel B. The driving wheel is drivingly connected to the transmission wheel B. The transmission wheel A is drivingly connected to the driven wheel, and the driving wheel is detachably and fixedly connected to an output shaft of a motor or engine. The driven wheel is detachably connected with a rear wheel shaft of the motorcycle. The center wheel is rotatably connected with a rear fork rotation center shaft through a bearing. The motorcycle is with the motorcycle rear drive transmission system.

A human-powered vehicle control device includes first and second rotary bodies, a transferring member that transfers drive force between the first and second rotary bodies, and a component. At least one of the first and second rotary bodies includes a plurality of rotary bodies. The component includes a transmission that performs a shifting action to move the transferring member between the plurality of rotary bodies. The control device includes an electronic controller controls the shifting action in accordance with a control condition set based on a travel state of the human-powered vehicle and/or a state of a rider. The electronic controller includes a first state that determines whether the control condition is satisfied and a second state that does not determine whether the control condition is satisfied. The electronic controller switches between the first and second states in accordance with a rotational state of the plurality of rotary bodies.

An electric drive for a bicycle is disclosed. The drive includes an electric motor including an drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive, and a transmission structured and arranged to drivingly connect the drive shaft to the driven shaft. The transmission includes a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears. The at least two output gears includes a first output gear and a second output gear that each engage with the driven gear offset to one another in a circumferential direction to drive the driven wheel.

An electric drive for a bicycle is disclosed. The drive includes an electric motor including an drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive, and a transmission structured and arranged to drivingly connect the drive shaft to the driven shaft. The transmission includes a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears. The at least two output gears includes a first output gear and a second output gear that each engage with the driven gear offset to one another in a circumferential direction to drive the driven wheel.

An electric drive for a bicycle includes an electric motor having a drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive of the bicycle. The electric drive includes a transmission, which drivingly connects the drive shaft to the driven shaft. The transmission has a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears, the at least two output gears including a first output gear and a second output gear, which in each case engage with the driven gear offset to one another in the circumferential direction in order to drive the driven wheel; and wherein the transmission has a power distribution, which divides a drive power of the electric motor to the output gears.

An electric drive for a bicycle includes an electric motor having a drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive of the bicycle. The electric drive includes a transmission, which drivingly connects the drive shaft to the driven shaft. The transmission has a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears, the at least two output gears including a first output gear and a second output gear, which in each case engage with the driven gear offset to one another in the circumferential direction in order to drive the driven wheel; and wherein the transmission has a power distribution, which divides a drive power of the electric motor to the output gears.

An electric drive for a bicycle includes an electric motor having a drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive of the bicycle. The electric drive includes a transmission, which drivingly connects the drive shaft to the driven shaft. The transmission has a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears, the at least two output gears including a first output gear and a second output gear, which in each case engage with the driven gear offset to one another in the circumferential direction in order to drive the driven wheel; and wherein the transmission has a power distribution, which divides a drive power of the electric motor to the output gears.

An electric drive for a bicycle is disclosed. The drive includes an electric motor including an drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive, and a transmission structured and arranged to drivingly connect the drive shaft to the driven shaft. The transmission includes a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears. The at least two output gears includes a first output gear and a second output gear that each engage with the driven gear offset to one another in a circumferential direction to drive the driven wheel.

An electric drive for a bicycle is disclosed. The drive includes an electric motor including an drive shaft, a driven shaft connected in a rotationally fixed manner to a driving gear for coupling to a wheel drive, and a transmission structured and arranged to drivingly connect the drive shaft to the driven shaft. The transmission includes a driven wheel, which is connected in a rotationally fixed manner to the driven shaft in a rotational drive direction, and at least two output gears. The at least two output gears includes a first output gear and a second output gear that each engage with the driven gear offset to one another in a circumferential direction to drive the driven wheel.

The present invention relates generally to motorizing a bicycle, and more particularly to an assembly for a quick-release mid-mount motor assembly system. The present invention comprises a bicycle motor assembly system comprising: a bottom bracket; an upper bracket; an engine disposed on upper bracket; and a freewheel system. The present invention also comprises a method of installing a bicycle motor assembly system comprising: providing a bottom bracket; providing an upper bracket; providing an engine disposed on upper bracket; providing a freewheel system; and securably disposing upper bracket in bottom bracket. The bicycle motor assembly system provides an easily installed motor that allows for the bicycle to either be pedaled or motored.