A friend had two of the SPE 26cc`s, both had faulty CDI units. Piece of thrash on other words. Don`t be scared of going gas just because you had a bad experience with the worst piece of crap gasser out there. There`s plenty of fantastic gas engines out there, I am in love with my MVVS 26cc with tuned pipe. 9100 rpm on MenzS 18-6 and starts at one or two flics and runs until it`s out of gas. Power is at 40cc level or higher