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 throttle i can hear it working, but the chain doesn't move and the bike goes nowhere. I tried pedaling it to make sure the chain wasn't stuck and it works fine. I was wondering if it was maybe the spark plug. How do i check? I am very new to this so please be specific. Thank you everyone!