by 1902 the quadrant cycle co was making their own engines, their advert claiming "the engine and carburettor throughout, as also the bicycle, are made in our own works". these were ahead of their time as the engines were not just fixed on to a bicycle frame. instead, the frame was purpose-built to properly hold the engine, and the quadrant motorcycles also pioneered a suction inlet valve, hand oil pump and direct drive, contact breaker ignition replacing trembler ignition in 1902, as well as a spray carburetor in 1904 and magneto ignition in 1907. a famous long-distance motorcycle rider called tom silver was contracted by the company and gained them a lot of publicity through his success on quadrant motorcycles in long distance events and in 1907 he became the managing director. the arrangement was not a success, however, and the company collapsed from internal disputes in 1907, with silver leaving to form silver motors.