Race Tech (http://www.race-tech.com) makes valve kits, as well as can source springs for front and rear on the NSR.

Not sure, but you can also try Traxxion Dynamics (http://www.traxxion.com/) to see if they have an AK-20 kit that will work on the NSR. THey can also source shock springs for you.


For the ride height, you are stuck to the point where there is no true ride height adjustment on the stock shock. The HRC shock has it, but you will need to find one. Ohlins can make you a rear shock (just need to convince them they can for the most part) with proper ride height adjustment.
_________________
Charles Gallant