These are a very rare pair of skates manufactured sometime in the early 2000’s. They are called Motosk8s. I got a good price and these are almost new. The engine that comes with these is great, a Zenoah two stroke, which makes 1.5hp at 8000rpm, enough to get you to about 25mph. You could get an upgraded version with advanced engine timing, a nice air filter and an expansion chamber, that could get you to about 35mph. The Zenoah engine is also great, since it is the same engine that is used in my Redmax string trimmer, a very reliable engine that is easy to get parts for.