Not a minibike but this is what iv been working on. Its a Rockford Tora I had a 2 stroke yamaha engine on it was a death trap the engine ran bad had no second gear or kick starter. Before that I had a saxonette on it for a short while. The original engine was toast I dragged it off the scrap pile at the junk yard and got it for weight price back in 2004 or so. I was looking at dirtbikes like a honda crf150f and decided Since i had the bike and the engine already id put them together and save myself the money. Its a 90cc 4 speed semi auto kick start honda clone i got from ebay a few years ago for like 130$ The bike works beautifully.