I have a 04 kawasaki Prairie 700. It cranks up fine but after that it goes down hill. It won't hardly idle and the motor boggs down and backfires when you give more than just a little gas. I'm talking it boggs down so bad in high I can only get to 11 mph. It has am fmh pro comp pipe that was on it when I bought it also. Anyone with any ideas would be greatly appreciated.