34 miles in and motor is clanking when i pull the rip cord?. its a 49cc 4 sroke huaseng motor or w/e the brand is called, i forget. I was revving it with the tire off the ground around the time it started happening. I was just cleaning it tho, and was trying to dry the tire off a bit. Does anyone know what is wrong with it?, or if this is normal?. Thanks.