That's the correct fuel tap for a yz250a and the tank stripes look fine I just had a look at a nos tank on my yz360a and all of my other yz'a models not resprayed and they are all over the place even from side to side they differ as really they are just decals put on by hand and clear coated etc.
So I would say it is just you.
And yes this is a awsome example I wish I owned it.
The fuel tap our thinking of comes on yz250c's and other models they were late 1975 and on.
Adam