NH3 PGMII's are in short supply. I've got a few, and a couple of the other usual suspects will have some hidden away. Not for sale though. I've hidden mine under a pile of hen's teeth.

Plotting the ign curve is a bit of a task. I wouldn't like to do it on the bike. I made a 'mechanical black box' to imitate the flywheel, so I can do all my NSR electronic testing on the bench. It's much less hassle than sitting there trying to hold the engine at a steady 11,500rpm while reading a timing light.

You'll find some very interesing curves while comparing open and closed throttle timing/spliced timing etc.