I was considering the purchase of a new YS 110 in the near future, but it concerns me that many people on this forum have had issues not only with the 110, but with most of the YS engine line. I have read hundreds of threads and have come to the conclusion that 20 or 25% of these engines don't run properly right out of the box.
I think that you have used your info to come to the wrong conclusion. How many folks are you expecting to come to a forum such as this simply to say how happy they are with a product, whether it's a YS engine of a stick of butter? All you are seeing are those who are complaining, and from all of my reading most of them aren't willing to actually read the instructions that come with the engine and that are available from YS, such as the ones that follow.