How you crack the NGK code
The combination of letters and numbers assigned to every NGK spark plug socket is not only the type designation, it is a logical formula which contains the important details for the function of the spark plug socket.
With this formula NGK has standardised its entire assortment and made the specific characteristics of the respective product clearly recognisable. This, in turn, simplifies handling and the right selection of NGK spark plug socket.
The precise explanation of the individual components of the code can be gathered from the graphic.
Explanation of the NGK code for spark plug sockets for motorcycles (pdf, 51 KB).