A friend just let me know that his rather nice 1931 Sunbeam Model 9 is now for sale. Obviously in lovely condition and fitted with a highly desirable 1929 single port engine. A great bike for someone? Send an email if you would like contact details.
People are often asking about the correct carburettor model and settings for their pre-war Marston Sunbeam motorcycles. Well, those helpful people over at Amal have long produced free catalogues that offer just such information. The “Amal Pre War Supplement” being of particular interest.
Here is a scan of the relevant page for the Sunbeam models covered by the catalogue.