Abstract: A drive assembly for a two-wheeled vehicle, wherein a closed chain is guided around a drive pinion and a sprocket for output. The chain is formed by pins, on each a bush rotatable about the center longitudinal axis of the pin, a roller provided on each bushing, for rotation around the bushing and has play, and the pins being connected to each other at two opposite ends by means of plates. The outer surface of the bushings and the rollers is coated with pure ta-C, having no further chemical elements except for unavoidable trace elements resulting from production in a PVD method. An Ra roughness between 0.03 ?m and 0.2 ?m and/or an Rz roughness between 0.3 ?m and 2 ?m is adhered to the surface of the coatings. The surfaces of the pinion and the sprocket in contact with the rollers do not have a coating of diamond-like carbon.

Abstract: A drive assembly for a two-wheeled vehicle, wherein a closed chain is guided around a drive pinion and a sprocket for output. The chain is formed by pins, on each a bush rotatable about the center longitudinal axis of the pin, a roller provided on each bushing, for rotation around the bushing and has play, and the pins being connected to each other at two opposite ends by means of plates. The outer surface of the bushings and the rollers is coated with pure ta-C, having no further chemical elements except for unavoidable trace elements resulting from production in a PVD method. An Ra roughness between 0.03 ?m and 0.2 ?m and/or an Rz roughness between 0.3 ?m and 2 ?m is adhered to the surface of the coatings. The surfaces of the pinion and the sprocket in contact with the rollers do not have a coating of diamond-like carbon.

Abstract: A shift device with an over-shift lock for a multi-speed transmission of a motor vehicle, in which individual gears are shifted incrementally, is provided. The shift device has a pivotable shifting element which is composed of an activation element and a driver element displaceably held thereon. Both elements have mutually aligned oblong holes which are penetrated by a shifting shaft leading to the transmission. A shifting process is limited by the striking of the shifting shaft against the end sides of the oblong holes. In this position, the alternating influencing of the shifting shaft and the contours of the oblong holes prevents a further rotation of the shifting shaft and thereby an over-shifting of the transmission.