Hi Tom
The big advantage tuning wise in our sport, Land Speed Racing, is I can use leaded fuel and Sunoco Supreme fuel is fast burning and is stable enough to advance the timing way further than I can with Unleaded. We got a Torque reading of about 36 ft/lbs around 10000 rpm. The numbers are all relative to the Dyno you use, but it is a 14hp increase over my Stock set up. I am really happy with the way the Curve goes is really smooth and straight above 8000rpm.
I use a Zeeltronic Ignition system that gives me the capacity to program in a 3D Ignition map, and control the opening of the Power Vales in the Exhaust ports. This sort of technology was once only available for Factory and later over the counter Road Race bikes like RS Hondas or TZ Yamahas,and was pretty expensive. Now it is both available and affordable.
I also have a set of Expansion Chambers designed for high RPM and not mid range Street Spec type pipes. I think I just did the research and eventually got all the Ducks lined up
The disadvantage with 2 strokes is you need to tune to avoid seizing. Being able to get Carbs with Power Jet circuits in them makes a big difference. The Main Jet Circuit is helped by an extra Jet that adds fuel in the high RPM WOT range, so Jetting is less compromised. Still is a juggle.
Pete