Here's one I was looking at:
https://www.japaneseclassics.com/veh...-cbr250rr-mc22
Unfortunately, my purposes are crossed. While it would be better than N250J for 250-Superbike class, a TZ250 would be best with even less weight and even more power!
It would make a great street bike! But alas, not street-legal in U.S. My brother has a VFR400R, I gotta see how he got that licenced! I've seen 2-stroke NSR250s running around, maybe they're just rolling dice on getting caught!
http://amcn.com.au/editorial/honda-cbr250-rr-1990-2000