120/160 (or even 165 slicks) can work OK with 3.5"/5" rims*, as long as the geometry is set up correctly, but 110/150 Pirelli Diablo Supercorsas are available, and IMHO, you won't find a better tyre [that are a direct fit on NSR rims].
*160, and particularly 165, are very susceptible to interference with the chain run.
_________________
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!