We have a 06 250 arctic cat, the one made by Kymco. It's been cold blooded right from new. Now that the temps are colder in this so-called Minnesota winter, I had to turn the air pilot screw all the way in just to get it to run decent. I'm thinking about going up one size in the pilot jet. I was wondering if anyone has changed the jetting on this ATV, and what did you find to work the best?