Hi I am new to small engines and this forum but I have looked around and I could not find an answer. I recently bought a go kart online to fix up and it was running ok. I decided to put a stage 1 kit on it (including gov deletion) and cleaned out the carb. That night it ran like a beauty but it was dark and rainy so i wasnt able to ride it very much. The next day when i tried to start it, the pull chord was locking up and I could not start it. I reset the valve lash at least 10 times and nothing changed. It pulls fine when the spark plug is out so i think it is a valve problem. However, after this didnt work, I took off the side cover (the cam shaft fell out and i put it back in. Idk if it was set properly before) and checked if there was any debris in there jamming it up. After finding nothing, I reassembled the side cover and tried to start it. It worked perfectly and started right up in one easy pull. So I put back together the whole go kart and tried to start it again. And the problem was back for some reason. It was locking up and I could not pull it. Is there anything else I can try to fix this problem. (Oh and I forgot to mention that it was not hydrolocked either). Sorry if this has been answered already but I have looked everywhere... Thanks!