RE: Set-up for YS 61 R?
By the way, I have the YS-61 aswell I have not operated the engine since 1997. I was using as far as I remember an APC 13x9 with a Bolly Carbon/Kevlar pipe. I'll try to find my setting and I'll post as soon as I can.
Here is the photo of my Robbe Saphir I powered by the YS-61 and Bolly pipe.