I have the adjustable OEM Kawasaki N1TC Needle, spacer and clip for the Keihin CVK34 carburetor.
I paid nearly $30 for these + tax your price $15 shipped to your door USPS Priority.

Part #'s
16009-1912--------Needle-Jet,N1TC
92143-1667--------Needle Collar
92037-1401--------Clip, Needle Jet

These parts replace the stock fixed needle jet to help you dial in the carb's midrange properly.
Parts are brand new but removed from plastic package, however the packaging and orignal sales receipt will be included.
My Ebay username is: c-9b if you would like to check out my feedback, if you are weary I can set up a private auction for you.
Please PM me with any questions.