My favorite engine has to be my Saito 45 I bought from this old guy in our club he said it was about 7 years old. I didn't think much of it because it has a straight pipe for a muffler and it leaked after run oil from the front bearing but the first time I started this engine I fell in love with it. It idles down to 1200 and reve a 11 X 7 to 10,000 it smokes like a chimney and sounds like a sewing machine at idle. I have it on a Kyosha Cub and it's the perfect match for this airplane. I have never had to make a single carb adjustment on it since I bought it all I do is fuel it flip it and fly it.