Hello everyone I am in need of help. I got my bike running once. Since then I get the bike pedaling but when i let out the clutch it sounds like its running but when I try and give it gas it just has a low rumble but doesn't do much when gas is applied and then dies out. I've tried it with the choke on and off. Its getting fuel. I have checked the spark plug and it looks fine. Im using the stock spark plug that came with it. Also its getting fuel because it started nicely once and also the bowl on the bottom of the carburetor is getting fuel... Any suggestions would be much appreciated, thanks!