You do not want to put a 26cc gas in this plane. I have the Venus II with an OS 120 4 - stroke and even with the servos in the rear it is nose heavy. I also had a MVVS 26 cc gasser and it is at least 16 ozs. heavier than the 120 when you include every thing. Actually my 26 cc weighed 60 ozs. with header and tuned pipe. I sold the engine because it was just too heavy for anything I had and had a lot less power without the tuned pipe.

My Venus comes in at 8.5 lbs. and has unlimited vertical with the 120 and only uses about 12 ozs. of fuel per 10 min. flight. I couldn't be happier with it.