Here's what you do.....
Search: Stadium Yamaha
Select: Kymco Parts / Xciting 250
Find: The body page that has the Mirror (Can't remember)
You will find an exploded picture of all the parts in that family
with P/N and Price. Order it on line. Takes about 2 weeks.
Very few people have all the parts and they usually come from Tiawan.
The mirror takes a 10mm socket. I had to machine the OD slightly
so it would fit in the mirror hole.
If you can afford it, order extra parts, oil change o-rings, filter basket,
etc. I have brake pads, belt, rollers already bought.
Stadium comes highly recommended.