Factory Manuals were written by the original machine manufacturer. The level of information is very detailed & includes not only assembly instructions but items such as checking frame straightness, torque values, use of special tools, electrical diagrams & checking for wear. There are many b&w illustrations. These manuals come supplied in a hard-backed ring binder, plastic covered with a printed front cover. This allows you to insert your own pages if required. 250mm x 295mm, 150-200 pages.

Norton Commando Factory Manuals are very similar in content to the Triumph ones shown above, except they are ring bound & have soft covers.

These are a spiral bound copy of the original Lockheed Brakes Service Manuals which provide detailed information on the servicing of hydraulic brake systems as were fitted to Triumph disc brake models. Much of the information is also relevant to the Norton Commando models too. Separate sections deal with the overhaul of calipers & master cylinders, including correct assembly & fitting of seals, brake bleeding procedures & trouble shooting. A very useful guide for an important part of any bike. 11 pages.