Pretty much everywhere in the world apart from the US (well, Europe, Britain and Oz at least, maybe Canada too?) never got the K3-K5, so you could still buy a new K2 here in 1975.
The engine numbers and frame numbers for non US bikes would be similar to the numbers for the US bikes made for that year, i.e., K3 (US) numbers would be similar to those of a 1973 K2 in Oz, Europe or Britain. Cheers, Terry.
