RE: Stainless steel or ceramic bearings for my Saito?
Ceramic and SS are not the best choice for bearings in our model engine environment. The Ceramics are fragile and the SS are soft and gall easier than chrome steal. Use high end chrome steel bearings with some kind of phenolic retainer especially in a 4 stroke where getting after run oil in there is a little more difficult than with a 2 stroke.
Denis