It means "You should check the jetting after ANY modification...".
I would advise going up on the main jets a few of sizes once you open the airbox up, and then come back down slowly, a step at a time if it feels a bit flat.
There's no such thing as a "full power" setting for the NSR as they were only ever sold for the (restricted) Japanese market, so we cannot advise specific carburettor settings. Jet size discussion is not allowed in the public forums for this very reason.
There is a section in the Members Area for jetting discussion.
_________________
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!