Sheldon's Emu began as a collection of articles, letters and emails about European motorcycles, the result of research and correspondence dating back to 1994. It now covers several thousand different marques, many of which have extensive archives including images and specifications. The site relates to vintage, veteran and classic motorcycles, scooters and mopeds, with many pages on road-racing and off-road competition machines.
There is a wealth of information for motorcycle enthusiasts, restorers and historians, and the site continues to amass data at a steady pace.