My 2003 Polaris 250 Trailblazer had to be tuned to run rich on sand because the sand was hot and soft so i needed higher rpms to make it through the sand. We had to switch air filters while we were down there because the one that was on it still had dust in it from the gravel roads it usually drives on. when i got back I tuned it back down to its original speed and realized that the 250 was really squirely and the air filter would squealing at full throttle and when first started it will try and die on me. Its completely stock except a performance spark plug and a new air filter. Im getting ready to throw an old DG exhaust on it because the other one has a crack in the silencer. IDK how to fix this problem