This is my first build. I purchased the Flying Horse two-stroke kit about 7-8 years back on sale for $89.95 if I remember right. It sat around for a couple of years before I finally got around to buying a bike to put it on (It was actually purchased for my shaft drive Progressive but after buying it I realized that wasn't going to work). The bike is a Target cheapy, about the same price as the engine. I'm not sure how old the build is, something like 5-6 years now. I've no idea of the amount of miles on it, enough that I'm going to need a new back tire soon.