I only have two EPROM chipped CDI's one is off a factory RC30 (around 1992) and a 1995 one off a RC45. I know Matt has one for a NSR250.

I got a selection of chips for the RC45 one which altered the ignition curve as well as hard and soft rev limiters. As far as I know only Factory teams got these units to start with but they did filter down. They were not available as part of the public race kit though.
_________________
If I have to take the carbs off once more...