You are not going to get much from anyone on recommended settings. Every bike is different. Lets say yours tends to run leaner than the rest out there, just because the way it came out of the casting molds and was assembled a little different. If someone like Tyga said, "Run 145 mains, 40 pilots, and stock needles" and you seized your bike immediately, wouldnt you be a little upset?? In fact, most Americans tend to sue over little things like that.

Most important #1 with these bikes: learn to jet. Like some of these guys say, "If I have to take the carbs off once more....!!"

By the way, jetting has WAY more to do with combustion chamber heat than fuel composition. And different fuel compositions atomize differently, so just switching types of fuel can richen or lean your combustion chamber air/fuel ratio. If the fuel does not atomize, it passes through the engine and never burns properly (taking with it unburnt oil in the form of "spooge" out the tailpipe). Running rich lowers the combustion temps, and running lean increases them. Avgas is known for haveing a slow atomization rate, because it was designed for airplanes turning no more than 5000 rpm. In a 12000 rpm engine, the fuel does not have enough time to atomize properly and tends to lean the air/fuel ratio.

Bottom line is this: you will get the most power from picking a particular fuel source and sticking with it, and jetting accordingly. Race gas will net you more power than any other fuel (provided you pick the race gas blend designed for your 12000 rpm 2-stroke). But most people have great results just from ordinary pump fuel.

And then there is the compression ratio and squish clearance factors that help the fuel burn.... ....but we will be getting into several pages of tech data to cover all that!

Hope this helps!
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
MY BIKE PICS