Rover 1912 499 cc side valve with Armstrong 3-speed hub gear frame # S32715 engine # 1923 The Rover safety bicycle creates a breakthrough in bicycle design at the end of the 19th century. In November 1903 the company presents its first motorcycle, which is much ahead of its time: a well-designed side valve engine with mechanically operated valves, spray carburettor, strong frame with double front down tubes and excellent finish. It creates a lot of interest and a thousand or so are sold in 1904. ...