• 1925 Sports model
  • slide3
  • slide4
  • 1936 Calthorpe Ivory model 500cc
  • 1925 Calthorpe Sports model
  • 1930 Calthorpe Ivory model 350cc
  • 1929 sales brochure


Welcome to the Calthorpe Motorcycle Group, dedicated to motorcylces produced between 1909-1947. The website is free to join so please sign up below to gain access to additional information and members forum.

We are building a comprehensive directory of Calthorpe models which will allow you to view:

  • CalthorpeCatalogue illustrations
  • Specifications
  • Road tests and press comment
  • Contemporary photos
  • Frame and engine number ranges
  • Photos of surviving machines
  • Restoration and maintenance notes

Join us for further disccussion on our facebook group


Machine Dating

Date your Calthorpe to the exact year and model from the frame/engine numbers, photos or machine description.                         

Find out here!

Resources/Download Area

Members gain access to view and download original Sales Brochures, Parts List and Instruction Manuals, Road Tests and much more... Its free to join!

Sign up here!

New Spares!

Now available for members, here you will find for sale, reproduction parts which we have had manufactured or parts which other members and businessess can produce on demand.