No disrespect intended but so far, the discussion has been focused on performance as it relates to the CV carb, i.e., poor mileage and partial throttle response with no mention of carb icing which may be an issue in your environment but has nothing to do with the OPs issue. However, I will file the carb icing information away for future reference should I relocate to an environment similar to yours but I doubt that I will relocated from south Texas. JMHO but I don't believe the OP has systematically approached the problem by investigating other reasons for the poor mileage and partial throttle hesitation; AFAIK at this point, the A/F idle adjustment has never been adjusted from the factory settings which is a necessary part of a Stage I upgrade. Carb tuning requires time and patience, only one change can be made at a time between test rides and the motor must be up to operating temperature before the effect of the most recent "tweak" can be evaluated. Tuning any carb by the seat of the pants is tough; much easier if the "tuner" has an A/F meter to check readings at idle, partial throttle positions and WOT before making the next "tweak".