Hi Gerard,
I am not sure I understand your question, are you looking for the length of the double cut front fender?
Here is best advice. Front top of fender from center of top stay bolt hole length to front cut is 71mm.
The bottom of fender from center of bottom stay to cut edge is 93mm.
It is possible to cut the front of a KO fender to correct length, but bottom of K2 fenders are not long enough to make it the correct 93mm length, they are to short on the bottom to make the correct length.
Hope all this makes sense when translated.
Best,
DW