I have a GSP Katana with an OS 160 and i am looking for a motor that is a little bit cheaper to run, I would like to install a MVVS 35 or similar. Has anybody done this and is it a suitable plane for this type of motor. I have had a ZDZ 40 (not in this plane) and didn't like the amount of vibration it produced. Is this what i should expect from gas motors, or are there smoother running motors?

Also i cna't fine any accurate dimensions for the MVVS 35

I had a new FPE 2.4 (40cc) gasser. It shook till the cows came home. I think that is how they are, until after they are broken in really good. I'm not too familiar with gassers, so maybe someone else can chime in.

I ran a G-26 on my Kantana. It balanced without any extra weight and flew very well.