ORIGINAL: MinnFlyer
My rule of thumb is: I'll go up to a 75 2-stroke and a 125 4-stroke. Anything above that is gas
.91 two stroke and 1.20 four stroke then gas. I just really like the SK .91s. As to the make of the gas engine it would pay anyone wanting to go gas to look in the gas engine forum and see what is going on. New gas engines are coming out very fast and hard to keep up with. Other then my Zinoahs I don't think any of mine are still made?? RCS and Brison, even a Fox twin.