I checked the forum and it doesn't seem like anybody has had this same problem before. I just joined the forum and am actually a fairly new ct owner and I had gotten it running about a month and a half ago. It still had a few issues that I would work on in between little joy rides (nothing big just removing some surface rust, getting the rubber on the original air filter to bend again to fit on the carb, etc.). I then let my brother ride it down the street and shortly after saw him walking it back. He says when he tried to ride back it would no longer go into gear even with the engine still running. After talking to him more he confessed to trying to go into neutral with the engine at pretty high revolutions, I dont know if that's a problem I'm not too knowledgable on automotives yet, but it sounds like a bad idea. Upon further testing we found that it still rides fine in the low setting on the sub tranny but when we try to put it back on the high setting it just won't go anywhere. Does anybody have any ideas?