I bought my Son a CFmoto 110 and in reverse the bike has all kinds of power and will spin the tires. In forward, if the bike is on a slight incline, it needs a push to get going. I've seen videos and other people complaining about this issue on my search, but I have not been able to find anything to resolve the issue. I'm wondering if others have found a solution to this problem? Different Clutches? Sprockets?