I have never had either of the engines mentioned apart to check them out, but basically the answer is yes. There is almost always room for improvement by blueprinting and "cleaning up" any mass produced engine. In the case of our conversion engines, there is generally a lot of room for improvement, because they were designed to be "idiot proof" in a machine that would work for hours at a time at high throttle settings in tough environments. Hence they are in a low state of tune to begin with in order to make them last.

I believe the Brilleli engines are all based on such engines, and I don't know how much they do to tweak them. I don't imagine it would be too much, as to do so would raise the price of the engine significantly. (Anyone that has direct experience with the Brillelis feel free to correct me here if I'm off base.)

AV8TOR