Used but fully functional. 50 bucks, you pick up in Scotts Valley or I ship (plus 10 bucks).
From the Speedo-healer site:
Kawasaki-I plug-n-go kit: Fits ALL Kawasaki motorcycles with electronic speedometer, such as:
Ninja ZX-6R (2004 and earlier), ZX-636R (2004 and earlier), ZX-6RR (2004 and...