So Mr. Reid---how did you set the valve timing on your engine? I am setting mine up so that when one cylinder is on the power stroke, the other cylinder is on the intake stroke---more or less. Actually, I'm setting it up as if the two cylinders are completely independent of each other. When the first cylinder is set up, I will then set the second cylinder up the same way I set up the first cylinder. As far as I can see, there are only two ways to do this valve timing thing. Either correctly, as I have outlined, or 360 degrees out of phase. I have no trouble setting up a dual opposed cylinder engine, nor a twin cylinder engine with both cylinders side by side, but this 50 degree difference in the two cylinders has me questioning myself.---Brian