That's two Echo 23.6cc cylinders for a total displacement of 47.2. However, the one I am working on now, my second one, has a longer stroke crank, and will displace about 50cc.

Thanks Terry. I know about the reed block. What I am wondering about is carb size, and I don't recall if Keith ever gave a recommendation on carbs for this engine. I have a 13.5mm carb on my first twin. I am thinking it would benefit from a larger, say a 15.8mm, carb.


AV8TOR