Just fitted one and it is very easy.
I used a complete front end wheel,rotors,calipers and forks.
All you need to do is grind the old weld off the bottom of the nsr triple clamp push out the steerer.
Get the RVF triple clamp remove steerer and press the nsr one in to the same height.
Weld the steerer on and fit to the bike.
Thats it you can still use the nsr front wheel if you like as it fits just juggle the spacers of the two bikes around and the wheel should line up.
Next send forks to ohlins dealer and get them revalved and sprung and you will be pleased.
A good conversion and thanks to you all for your previous posts