I am not trying to be a wiseguy. I am telling you the truth.

YS engines are great until a minor problem crops up. Most sport flyers are not meticulous enough to learn the drill. Maybe you are, but maybe you are not. I have no way of knowing.

I do know that any YS user that is intent upon using these engines will have to learn how the engines work at a level they never dreamed of before. Some would be better off with a simpler engine design, such as the Saito .72, or any non YS engine.

My only suggestion to those that still insist upon using YS engines, even though they lack the talent to maintain them, is to buy several so that they can keep one or two in the mail.