I just bought this thing today. She starts up like a new bike and runs like a champ. Doesnt make any weird noises and the all the plastic is in great shape. But she is a smoker. When I got her home I rode her around the block once, got back to the house and the county boys were there trying to give me a check for all the mosquito spraying I was doing. The guy I bought her from swore that she did not burn a lot of oil. So where is the first place to take a look at to stop the smoke? Valves?? Rings??