does the bogging sound like is gasping for air? if so its too lean in the mid throttle range.
if it sounds like a 4 stroke or close to 4 stroke, then its too rich in the mid throttle range.
adjust the needle, and forget that setup, ur better off with a bing on the stock intake, u gain nothing (or very little top end) with a huge carb on the end of a small intake but tuning issues