My quad is stock with slip-on exhaust. I'm having a low acceleration stutter and then it turns off. I installed a DynoJet Kit LS Jet 144 / RS Jet 146. I'm below 3000 feet. I turned the mixture screws out 2 turns. I also tried 3. The needle jet clips are set to 3 from the top and I tried 4 also. But I am still having the same problem. Please Help!!