A motor device for an electric bicycle may include an electric motor, a first connector unit, and/or a second connector unit. The electric motor may include an axis of rotation. The first connector unit may include a first motor connector and a first connecting part. The first connecting part may surround the first motor connector regionally and/or outwardly. The first connector unit may be mounted on the electric motor and may be electrically conductively connected to the electric motor via the first motor connector. The second connector unit may include a second motor connector and a second connecting part. An electrical conductive connection may be established and released directly between the first motor connector and the second motor connector.