Well, I fly a 1/4 scale super cub with a homelite 25cc and it weighs 17 lbs dry. Wing span is 104 " and alot of chord. I am not sure what the area is but the 25 is good for this plane. It was not at first however. I had to open the exhaust and replace the carb to get 8000 rpms with a 16x6 to get a good climb out but after those two mods and as the engine breaks in, it is great.The cub is a dynaflight, you may be be able to find out the wing area on my plane and compare it to your bipe and make a decision. The big cub will do loops and rolls from level flight now and the homelite is very reliable after a few mods.

Just my 2 cents,

Travis