A lot of us get this without turbos also. Last I heard from James he recommended:
"Based on the inconsistencies I'm seeing in the map, I am suspecting electrical or mechanical issues. Since the ThunderMax is making adjustments while you ride, it is relying on perfect data coming from the motorcycle. Possible causes of your issues could be worn or bad sensors, broken or damaged wiring, corrosion, worn out pins, broken throttle shaft, the possibilities are endless. The first step would be to disconnect all of the sensors, clean all of the connections with alcohol and lubricate with dielectric grease."
Huge cop out, but I've been expecting this more and more. Kind of like Apple with their antenna problems, lol.