ok there is about half a quart in the box why? rode it about a month ago no problems, started it lastnight and checked everything over including air filter it was ok, looked in there today and its full of oil. it was never stood up or rolled, i searched and all i can find is some guy saying there is a check valve in the oil system that might be bad or stuck. the oil level is checked before every ride so its not over full. just wondering if anyone knows anything about this.