Lets, hypothetically think that we have several engines. All burning at the right a/f mixture level. None of them are rich, and none of them are lean. Lets also assume they also all use the same type and model of carb, but they all require different jetting to get to their optimal spot where they are not rich or lean. These engines being 2 strokes, I will for example say we have a tecate engine, a tri-z engine, a 250r engine. Lets say the 250R needs a 165 main jet to be in its spot. The Tri-Z needs a 152, and the Tecate needs a 178. Everything else being equal, the Tecate should be burning and using the most amount of fuel because it has the largest main jet, correct? So can we use main jet size as a rule of thumb for power ouput (again, supposing the mixture level is right, and its not over or under jetted)?
Heres another hypothetical, How about a Tri-Z motor with a 185 main jet and a KX500 motor with a 168. Is the smaller Tri-Z motor in theory actually making use and power from the additional fuel then the KX500? I've seen some discussion here in the past about the jetting differences between small bore 250s and the big bores on how the big bore engines do not seem to need as much main jet as the smaller motors, I tend to agree with this from my experience. But, its also my experience that the big bore motors out perform the smaller ones even with the smaller jetting. So what is the cause of this? Are the big bore motors more efficiently using the less amount of fuel? Or Does a larger bore and stroke produce a stronger intake resonance and pulse that does not require as large of jetting because its pulling in the mixture "quicker"?