So Rolex doesn't have to pull his hair out, let me state this;
Set ALL the carb settings back to factory (see owner's manual) and then tune ONLY the HSN, 1/8th at a time. However, disregard this advice if you have NOT followed the proper Traxxas break-in procedure as per the owner's manual. If you have not broken in the motor with the 5 step Traxxas procedure, do it now, anyhow. Follow it to the "T" and then tune for performance. Also, give yourself about 1-1 1/2 hours to do it. If you get it done in less than one hour you did not follow the instructions, and all 5 of the steps must be done one right after another, not over 2, or 5, or more days.