OK I haven't had much time to ride but have about 8 hours on it. 6 hours of forrest riding and the rest just playing around in front of the house. My friend has about the same time on his. First the problems: My chain guide did not line up and rubbed the chain on the side. After looking at both our bikes we found the mount on the swing arm is not welded on strait. Had to bend it for a fix. My rear brake adjusting screw vibrated loose and caused the rear brake to overheat from dragging. Quick fix no other problems with it. My buddy had a oil seal/plug just above the counter shaft sprocket pop out and leak oil. Also a quick fix. He said he has a problem with popping out of gear, but mine does not. He has big feet so he thinks it could just be him. Next time we go hes going to ride mine and see if it still happens. My only problem with the trans is its hard to find neutral with the motor running. Not much of a problem if you ask me. Other than that the bikes have been great. Fun to ride and lots of power. I just ordered a 12in rear rim and spokes to lift up the rear some. It does sit too high in front. I may change the gearing sometime in the future. Right now first is a bit too low. Also I plan to ditch the key and install a kill button. I'm really happy with it. I think it was a good deal.