Summerfield motorcycles have been in production since 1989, constructed by a large engineering firm located in Derbyshire.
The company is run by three brothers who are classic racing enthusiasts and who turned to producing spares for Manx Nortons in 1986.
In 1989 they, together with Bernie Allen, obtained permission to build complete machines. The results were very successful.
They produce both 350cc and 500cc models, and engines are sold separately, as well as all the individual parts.