I'd speak to Mr. Matt from TYGA!
In fact, I know MikeNye is after a set for his MC16 too, so a worthwhile enquiry for you both!
All the NSR's share similar bore sizes, so you'll probably find that, although not a perfect match, one of the MC18 pistons should do the job. It's just a case of knowing which one has the closest measurement to the MC16 - and if he doesn't know, I'm sure he'll make the effort to find out!!!
Andy.
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