If you want great performance for a 2 stroke check out the Tower Hobbies 75 engine. Its an easy to adjust strong running engine. This is one one case where the quality and performance far exceeds the low selling price. The other engines are top quality no question, but cost twice the price for the 2 stroke or 2 1/2 times extra $$ for the 4 stroke. You have to ask yourself if the slight extra power that you "may" get worth that to you? [8D]