got a question about my nephews quad. got it out from the winter storage in the garage. changed the oil used 10 w 40 kawasaki 4stroke oil, lubed the air filter with maxima spray on filter oil. still running the original sparkplug. when this thing is idling there is no smoke but when he is winding it out it's leaving a little trail of white smoke. not anything major but still i'm concerned. this quad has about 40 or so hours on it, is it possible that it needs new rings? also the airscrew is 1.5 turns out!!!