ORIGINAL: Alex7403
90 2 stroke engine seems to be too big for 7 lb airplane, besides I dont like supertigers they seem to need special adjustments with the high and low end valves.
I've owned a lot of them and haven't really done anything extraordinary to get them to run right....not anything I haven't done with any other brand of engine.
Personally, Super Tigre is my favorite two stroke. A .90 is a little on the large side, but Super Tigre also makes a .75 and it would be cheaper than an OS. Close to $100 cheaper.