A one-way clutch for connecting and disconnecting an electric center motor to and from a drive of an electrically powered bicycle with a coaster brake, said drive comprising - a drive shaft having a longitudinal axis; - a sprocket arranged coaxially with the drive shaft; - a crank arm arranged on the drive shaft; and - an endless chain arranged over said sprocket, wherein the one-way clutch comprises - a sprocket member for transferring rotation from the one-way clutch to the sprocket; - a crank arm disc for transferring rotation from said crank arm to said sprocket; - a drive disc for transferring rotation from the electric center motor to said sprocket, said drive disc being rotatable relative to the crank arm disc and said sprocket member; - at least one displacement member journaled in a bearing through a portion of the sprocket member; - at least one first cavity formed as an indentation in a surface (42, 152) of a portion of said crank arm disc, and configured to receive and engage a first portion of said displacement member; - first inter-cavity surface portions formed adjacent to and between the first cavities; - a plurality of second cavities formed as indentations in a surface of a portion 56 of the drive disc, and configured to receive and engage a second portion of said displacement member; and - second inter-cavity surface portions formed adjacent to and between the second cavities, wherein said at least one displacement member is linearly slideably relative to said bearing between - a first position, where a first portion of the displacement member is received in and engages a first cavity, and where the displacement member is disengaged from any of the second cavities; and - a second position, where a second portion of the displacement member is received in and engages a second cavity, and where the displacement member is disengaged from the first cavity, and wherein a forward rotation of said crank arm disc relative to said sprocket member pushes the at least one displacement member out of said at least one first cavity and into engagement with a second cavity, where it is kept in place by the a first inter-cavity surface portion while the forward rotation of the crank arm disc is maintained, and where a backwards rotation of the crank arm disc displaces the at least first cavity into alignment with a bearing, a second inter-cavity portion pushes the at least one the displacement member into said first cavity. - a drive shaft having a longitudinal axis; - a sprocket arranged coaxially with the drive shaft; - a crank arm arranged on the drive shaft; and - an endless chain arranged over said sprocket, - a sprocket member for transferring rotation from the one-way clutch to the sprocket; - a crank arm disc for transferring rotation from said crank arm to said sprocket; - a drive disc for transferring rotation from the electric center motor to said sprocket, said drive disc being rotatable relative to the crank arm disc and said sprocket member; - at least one displacement member journaled in a bearing through a portion of the sprocket member; - at least one first cavity formed as an indentation in a surface (42, 152) of a portion of said crank arm disc, and configured to receive and engage a first portion of said displacement member; - first inter-cavity surface portions formed adjacent to and between the first cavities; - a plurality of second cavities formed as indentations in a surface of a portion 56 of the drive disc, and configured to receive and engage a second portion of said displacement member; and - second inter-cavity surface portions formed adjacent to and between the second cavities, - a first position, where a first portion of the displacement member is received in and engages a first cavity, and where the displacement member is disengaged from any of the second cavities; and - a second position, where a second portion of the displacement member is received in and engages a second cavity, and where the displacement member is disengaged from the first cavity, and