Steve at Performance Engineering in Plymouth is quite probably the best in the country for NSRs.

St. Neots would probably do it too, and turn out some fantastic restorations, however they're focussed on GP250s, not street bikes. While the NSR motor is very similar to the RS in many ways, it's not a given that RS specs and procedures directly transfer. Steve, on the other hand, has intimate knowledge of both the NSR and GP motors.
_________________
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!