i'd go out on a limb and say a properly setup pv cheeta even a stock stroke 65mm would be much easier to use and make power than the rz junk..
yes i dealt with one of these it was a neat motor but after fighting electrical issues with it all the time it wasnt worth it plus all the extra do do to make it all work sucked..
NOW maybe using a litium battery, and a proper programer/ cdi for the electrics would change my mind on one.. BUT after dealing with other designs using pv's i think i would rather waste my time on a two stroke shop pv setup in a modern cylinder.. using the same other items.. a more modern pv setup with proper pipes, electrics and controll based on rpm AND engine load would be very cool. i think it could be done with carbs with tps sensors..