Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 138,125 pages of information and 223,035 images on early companies, their products and the people who designed and built them.
The former built racing two-stroke engines, the latter produced frames and the basis came from work carried out by Barry Hart, of Caernarfon, in Gwynned, North Wales, who tuned Suzuki triples.
In 1975 a machine was built that had a 500cc square-four engine modelled on the Suzuki RG500, but with very different detail. From this came the Phoenix 500cc and 750cc fours that became famous as the Silver Dream Racer in the film that starred David Essex.