Does anybody know what year a cr jug with the circle v code is?

a circled V on the reed cage boss is a 2001 CR250 cylinder

Thanks mod.

Do the other years have a marking indicating the year like the case's do?

yes they all should have a mark unless engine builder took it off. The single leter on the reed cage determins the year.

what year cylinder is for the letter M

V-2001, T-2000, S-1999, P-1998, N-1997, M-1996. I think that is how it goes.

I believe 92-96 are the same 97-98 are the same and 99, 2000, 2001, are different. I think 92-96 is a j?

96 to 01 are all marked different

What year is L?