I don't think so, but after about an hour of riding for about 10 mins, letting cool, riding again, I came to a stop sign and the engine revved up super high. The kill switch would not shut it off, closing the choke wouldn't shut it off. I had to grab the brake and let the clutch fly. This has happened before on previous runs. The kill switch always works except when this runaway revving takes place.So whats the problem now? Your plug is looking pretty good. Is it still lean surging?
I saw a video of a guy on a two stroke motorcycle who had the same problem. He said he had an air leak but that the reason the motor revved uncontrollably was because the head or the spark plug were so hot that the engine was dieseling.