It is a 49cc motor. When I got a hold of the guy he said he already had 6 guys wanting to look at it and I was first in line. So I got down there as soon as I could. It has the ring at the bottom so from what I can find from other models it is a Barracuda Plus. I measured the with of the ring at the bottom and it measured 9 inches so hopefully it will work for me for a while!