A stock NSR250 should run OK on 91, but it's far from ideal.
The way the rev ceiling is dropping, I would put money on the reg/rec.
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!