When I had my NT I did a bunch of research on how to get more power from the engine. In the end it was going to take a lot of money for little improvement, ie, 10-15% for $1000-2000.
Unless you are going to do something with the exhaust and intake then using a PC will probably get you about 5%, and that might be stretching it. Most people I know have used it on other bikes to 1) smooth up a stock system or 2) compensate for upgrades they have made to the engine. My experience was the NT did not need to be smoothed up.
I'd look at some of the forums for the Honda Hawk (IIRC) the one with basically the same engine as the NT. When I looked though them they were 'improving' their engines to get the amount of power that the NT has as stock. That was with carbs and custom exhaust.
Many dyno shops will tweak the engine to run hotter to get a few HP to justify their expense. Reliability is not their concern.