Can't seem to find the Dyna-Jet problems page. I would think that it would be the best set-up since there is such a BIG difference in jetting needed for the 2 cylinders. My V-Force seemed to load up after I installed the HMF full duals and Jetted to their specs. I am not lazy, but do not have the time to try jetting and then rejetting to try to get it absolutely right. The Dyna-Jet seems to be a whole lot easier, time efficient and make adjustability for the elevation changes here in W.Va.