A vent flap, in particular for venting an interior of a vehicle, includes a frame consisting of a first material and at least one non-return flap. The jaw-like opening is located on a longitudinal side of the clamping head. To facilitate digital signing or encryption of position data, an encryption key may be embedded within a positioning device by a manufacture of the positioning device. The plurality of MR signals are sent to a plurality of receivers wherein the receivers are each adapted to adjust their respective center frequencies at a rate commensurate with a rate of translation of the positioning device. The mechanical linkages, electrical connections and motorcycle-securing mechanisms are designed to they can be easily connected and disconnected in a manner so that the biker can easily transition between the three-wheeled motorcycle-powered vehicle and the standard motorcycle without tools.