Volume Two in the Shop Dope Series contains numerous informations about sidevalve and overhead valve twins as well as single cylinder models. Included is a complete roller bearing identification chart with sizes and numbers used in motor and transmission applications. The clutch and transmission sections of the book have the only available service data on pre-1940 45“ transmissions and Servi-Car rear axle assemblies. Of special interest to 61“ OHV owners will be the special section of information and drawings on the 1936-39 Knucklehead motors.