Thanks for the replies guys.
I've just bought myself an MC21 and I intend to do a full resto job on it, (I need to ask Silikesguinnes some questions about your front end also).

What's the best way to upgrade the rear to something more modern with full adjustment?

On an RGV, late model GSXR shocks will fit - will something like a CBR600 shock fit the NSR? I understand that I'd have to change spring and valving.

On a side note - I'm not having much success with the search function on this forum - is there a way to search topic titles only?