Hello
I have my Poulan 25 cc stock inside, original throat carb enlarged at 9.5 mm diameter.
Nice, more than 50 hours flown, logged in a small book each flight and the problems I have , only one bad plug and dirt in the carb because use cheap filter, now use MANN motorcycle filter.
Very sweet, I am use props hand made because the props are expensive, with the price of 5 props(yes five) I can buy a new Poulan. For this reason number can not compare.
Have a plane, a bit more than 6 kilos, 1600 sq in, 80 in wing span, very relaxing flights, the plane fly better than I.
Happy landings
Jose