move

What should I do? loosen the nut? I have it set down to the lowest height anyways....

I have looked everywhere i could find on the site and just couldn't find an answer. I got my 4-stroke kit from Daemon Bikes running. It worked fine. I waited over night and then worked on the back sprocket a bit, (needed centering) and now it won't move. It starts fine and when i twist the...