RE: SuperTigre mid-range problems?
dennis- the 2300 should be broken in by about 1 hours running well enough to go to a lower idle- 2100 or so. mine were. If you need a lower idle than 2000 then very few 2 strokes will work for you. Super tigers won't do 1500 rpm idle unless you run a massive prop, and even then I doubt they would idle reliably at 1500.
Clockshop - the thing you need is more muffler back pressure. There is not enough pressure in the fuel tank to feed enough fuel to the 2300 at full throttle. Look at the outlet tubes on your muffler. Compare them to the muffler that comes with the 2300. block off enough of the muffler outlet tubes so the total area of the slimline is about the same as the original muffler. This will give you enough back pressure so you should get control with the high end needle. If you don't then there is a problem outside the engine with the fuel system (tank height, line size, distance from the engine, etc.)
Ed