something that may help your research.

A guy called borut, had designed, built and sells programme able ignitions and povervalve controllers for two strokes for a few years, there manufactured under the name zeeltronics and have allowed big power gains to be made on a number of two strokes, rgv's and rd350 to name a couple.

Have a look at his gear, He dosnt do anything for the NSR, not sure why but have a look, might help with what your exploring http://www.zeeltronic.com