Up until the introduction of the Mono-Shock models, engine and chassis numbers were matched, however, the introduction of the K Series machines heralded the demise of this simple means of identification and currently the engine and frame numbers bear no relation to each other over the whole model range. One advantage of the change is that with the later models, it is now possible to tell the year of manufacture of the engine.

As I understand it - no guarantees here!!! A years model production begins after the workers return from the main summer works shut down in the previous year - I believe production starts around the beginning of September for the next years model production.

Ultima Engine Serial Number Location Near Me

All Monoshock R Series engine numbers will look something like this: 08/87/0128 - the first two digits refer to the week of production, the second pair indicate 1987 as the production year and the final four digits represent the number in that weeks production.

A K Series engine number will look something like this: 104EA 1799 2032 - the first two digits refer to the engine capacity (1000cc); the third digit shows the number of cylinders; EA is some reference to a Federal Emission Code; sixth & seventh digits are the production week number (week 17); eighth & ninth digits are the year of manufacture (1999); the final four digits are the production number on that weeks production.