Hey all, My Slingshot not running great right now. Take a look at these pics of the spark plugs. 3 Black Spark Plugs and 1 White Spark Plug. I just took them out today to look at them. I have labeled them 1-4 and you will notice the 3nd one is "White" and the other 1, 2 and 4 are very "black". What do you think is wrong?