Remembering the Aurora Automatic Machine Company ...
· In 1911, the company added a freewheel engine clutch and beltdrive option was limited to only the singlecylinder engines. In 1912, the vtwin design became more standardized with push rods and thin, tin rocker arms added to the cylinder head, while the position of the cylinders was moved rearward, into a 50degree "v" shape. Competitors in the business, like .