- The kick-starting device, change-speed gearing, and transmission and driving mechanism for a cycle or road vehicle are enclosed in casings secured to the crank chamber of an engine so that the whole comprises a unitary structure. As shown in Fig. 1, a four-cylinder two-stroke engine is secured to a casing b enclosing a plate clutch g; the casing is divided adjacent to a partition b Courtesy Sergio Scalerandi
A.M. Low Motorcycles