IMHO= In My Honest Opinion
Two strokes don't get a chance to "rest" and cool down between power strokes, like a four poke does. 8-|
IMHO, unless you are fouling plugs or blubbering like a drunken idiot, you are not to rich.
As you go from rich to "perfect" jetting, power rises quickly and ex temps moderately. As you go from "perfect" to lean, power drops very slightly but ex temps rise VERY quickly.
A dragger can get away with leaner jetting and more timing cause they only run for a few seconds. If you want to run for hours straight, you have to be more consevative. The only thing that cools the piston is the incoming charge under the piston and as it washes acrossed it on chamber filling. Remember the piston has .003-.004 clearance (cold) so it's only touching the cylinder basicly at one point.