"The Workshop" is a fantastic web resource that chronicles each and every make of speedway bike from the 1920s until the late 1990s. It is not entirely clear who painstakingly assembled this online history, as it appears that the site has been dormant for quite some time, but it is now archived on cybermotorcycle.com. Although it is not possible to view some of the photographs on the site, all of the original text is intact.
It would be interesting to find out more about who created this site in the first place and it begs the question, whether it would be possible for a group of like minded enthusiasts to add to this important mechanical history of the sport, as it would be a great shame if the contents of this site were lost.