There were about 3 or 4 dirtbike decals from those years, and scans of them are hard to find.
The one with dirt behind the text and a spade on the seat tube
The budwiser one with the red bud shape thing behind the text
The cool one with sculls and stars on the downtube
The mexican "S Y M" decals (cos "Y" is mexican for "&", or so I was told)
Id say those mexican ones were the ones to use on your frame. I had a dirtbike with them on in 93ish.
The only ones I have scans of are the very first dirtbike (89-91) and some of the much later ones (95ish).
Oh, and look at that. The one in your pics has also got a coaster anchor. Its a flat land thing!