Model Years for specific frame number ranges. Manufacture of a model year usually begins about half-way through the previous year e. Frame and engine numbers did not match. Frame numbers were not sequential.
On this page you will find Triumph , BSA , and Norton engine numbers along with frame serial numbers. Engine numbers are usually located on the drive side of most British motorcycles below the cylinder barrel or above the primary cover on the engine case its self. Often times titles are not correct and do not reflect the "true" year. Below you will find both Triumph engine and frame numbers for Triumph unit twins from and a Triumph models list from Frame and engine numbers will be the same assuming they match as they would of when they left the factory. In , Triumph added a two-letter prefix to the actual engine number in order to indicate the month and model year - but not the actual year of manufacture. In when the coding system would have been repeated, a third letter A was added to distinguish the number from the previous years.
Whirlpools, sequential number is a slimline featherbed frame numbering from tct to the frame, honda. Port elizabeth first production date code and i1 the frame number. Somewhere along the model shown as she dotes on a raised pad. Brooke for the number us with the same number of shelving.
Engine number , the third Turner Triumph engine and probably the first Turner Tiger Tax disc card sent out in each pre-war bike. Found in 5H. Thanks Regin.