I'm trying to decide what i want to do with my ultimate 120. I currently have a saito 150 on it and it is lacking for 3d performance. I was going to make the switch to a os fx 1.60, but now i've run across the MVVS gasser which puts out a rated 3.8hp and weighs in at 37.04 ounces with out the muffler. Anyone have any experience with the MVVS gas engines, to me that HP number sounds very optimistic for this size engine. Love to hear some opinons...
Al