The vendor sent a 15 tooth sprocket and also it's not for a 520 chain so I sent it back.
I'm trying again at a different site.


Back of stock sprocket stamped YX whatever that means.


Front of sprocket showing retaining ring.


Stock 13 tooth sprocket installed. 14 tooth is going to be a tight fit.


Inside of cover. Appears to be about 1/4" space for the 14 tooth. I guess the cover could be left off but I'm not going to do it and in fact I am going to install a chain guard to protect the family jewels.
Look down while you are riding and you will see why.

If the 14 is a no go then the reducing the size of back sprocket is next.

BTW, Got my Florida title in the mail today so all is good there.