First I put theie polaris muffler on and my bike ran great. Then I went with the K&N air filter. I followed the directions to the T. Started up my bike and started to smoke out the muffler. I thought oh, time to re-jet. Take my bike to get re-jetted at dealership. They said all they needed to do was put a 150 main jet and that was it. Brought bike home and started it up and still smokes. Called dealership and they said oh that's normal, it's burning more gas, that's why. I put stock filter back in and the smoke disappeared. What is going on? should I forget the K&n filter or what.