Abstract: An improved drive for use as between the engine and the clutch or transmission of a motorcycle and as between the clutch or transmission and the drive wheel. Instead of a metallic chain, a toothed timing belt of flexible or synthetic fabric material is used. The belt teeth of the pulleys on the shaft of the engine, on the shaft of the clutch or transmission and on the shaft of the rear wheel are machined to have a shape and configuration to adapt them to receive the teeth on the timing belt. The same type of belt is used between the engine and the clutch or transmission and between the clutch or transmission and the rear wheel. In the preferred form of the invention a sleeve housing is provided with peripheral teeth and of a shape to fit back over the clutch or transmission.