I'm having a heck of a time locating a 12T sprocket for my 04 MC250. 13 and 14T's are easily found. I did find a 12 that says it's for a 2010-2013. From what I've read, they are the same shaft up until 2015-ish? If so, then I'll just start ordering for a newer bike. Anyone have a solid answer for this?